KEIHIN CARBURATORS FOR 4-CYLINDER HONDA MOTORCYCLES
|
|
- Solomon Dalton
- 6 years ago
- Views:
Transcription
1 KEIHIN CARBURATORS FOR 4-CYLINDER HONDA MOTORCYCLES Set of 4 Keihin carburetors marked 089A and used on 1976 CB550K GENERAL NOTES: All carburetors perform the same function: mixing air and fuel for supply to the combustion chamber (cylinder). The ideal carburetor would do this in the perfect ratio of about 15:1 all the time. I say air and fuel putting air before fuel for emphasis. Air is crucial to the combustion process. The fuel (gasoline) cannot burn without oxygen or will burn only partially if there isn t sufficient amount of oxygen. In turn, your engine will run inefficiently. How well the carburetor takes in air is important. Carburetors utilize the exact same principle of operation as the one employed in a spray bottle. When you press the lever on your Windex bottle, air from outside is forced in. This pressurizes the air inside. The pressurized air applies a force on the liquid inside, which then travels up the tube and out the spray nozzle.
2 It is the pressure differential that does the trick. Higher pressure inside the reservoir, lower pressure outside. The reservoir in a carburetor sits at the bottom and is normally called a bowl. The fuel inside is at atmospheric pressure (since the bowl is open to the atmosphere via an overflow pipe). In order for the fuel to come out of the bowl and go into the combustion chamber, the pressure above the bowl must be made lower than the pressure inside. Creating such a pressure differential is the chief principle in carburetor design. When the piston in the cylinder starts moving from its highest to its lowest position it creates suction (like a syringe). With the intake valve in the cylinder head open, this suction pulls air through the carburetor. A wind, in essence, is generated moving from the outside through the carburetor and into the engine. This wind moves through what is termed a Venturi (an open pipe more or less) and passes right over the bowl containing the fuel. Now, according to what is known as Bernoulli s principle, the faster the wind the lower its pressure. So, the air in this wind is at a lower pressure than the pressure inside the bowl and there we have it: our desired pressure differential. The fuel in the bowl now moves up a tube (called a jet), mixes with the air in the wind and into the cylinder the mixture goes. A spark, a powerful explosion, a gorgeous rumble in the exhaust pipe and you are under way. WHAT S WHAT IN A CARBURETOR AND WHAT IT DOES: Considering the simple job a carburetor needs to do, it s shocking to discover how intricately complex it is. But watches are like that too. To perform a simple job (transfer the tension of a spring to a mechanical movement of two hands telling the time), a watch must employ some 100 parts. A typical ROLEX watch has about 150 parts; all of them precision-machined. Well, the bank of four Keihin s on your HONDA CB bike has over 300 parts (some 70 or so per carburetor and about 40 on the rack/stay) all of which must be put together with precision and tuned perfectly in order to perform as intended. I like to know how things work. I wish all service manuals took the time to explain how things work and why you are doing the work they describe. It is frustrating to simply follow a procedure (loosen nut A, undo bolt B, remove part C, etc.) without knowing the principles behind it. And so, what are these 300 parts and what do they do?
3 Let s take a look. Top cap. Covers and protects the throttle valve. Carburetor body. Air Screw. It regulates the air that mixes with the fuel from the slow jet. Choke lever. It opens and closes a choke valve in order to restrict or allow air to come into the carburetor. Fuel bowl. It houses fuel and is directly connected to the fuel tank via a fuel hose. Drain plug. Used for draining the fuel out prior to long term storage. The fuel bowl is also called float bowl. HONDA manuals refer to it as float chamber body. It operates on the same principle as a toilet bowl: Fuel flows into it by gravity. As the fuel level rises, it lifts a float. The float then pushes a float valve, which eventually shuts off the fuel supply from the tank when the fuel is at a certain level. When fuel is consumed by the engine, the fuel level in the bowl drops, the float drops too, the float valves opens, more fuel flows in from the tank and the cycle repeats. Inside the fuel bowl chamber, there are some very important components, so let s remove it and take a look:
4 Main Jet Slow Jet Float Pin. Float. Leaf Spring. It keeps the main jet in position and it also prevents the screws securing the bowl to the carb body from loosening. Float Valve. A tang on the float pushes the float valve upwards to shut off fuel. The float valve drops down by gravity as the level in the bowl drops. A quick word about the hot topic of jets, jetting and re-jetting. The main jet (a small brass piece with a hole in the middle) provides an outlet for the fuel to leave the bowl when the pressure above it drops. The diameter of the hole determines how much fuel can go through. Hence, the jet numbering/nomenclature. Main jet #100 means the diameter of the hole is 1.00 mm, #98 means a diameter of 0.98 mm, etc. The main jet (and its associated important components) does an excellent job of providing fuel to the engine at almost all RPMs except
5 very low and idle. To solve this problem, designers added another jet and called it slow jet. The slow jet s job is to provide a little bit of additional air/fuel mix so when combined with that from the main jet at fully closed throttle, the engine can idle smoothly. It is also a brass piece with a hole in the middle. But in this case the hole is much smaller and its cross-sectional area is about 7 times smaller than that of the main jet meaning that the amount of fuel going through the slow jet is at least 7 times smaller than the corresponding amount going through the main jet. Both the main and slow jets are constantly submerged in fuel and the air/fuel mix they provide is routed through different passages inside the carb, but their individual mixes, of course, end up the same place. Both jets provide air/fuel mix to the engine at all times. It is a mistake to think that the slow jet (also called idle jet) stops functioning as soon as the motorcycle starts moving. To re-jet or not to re-jet. Much has been written about this and much fuss has been made about it too. My advice is: don t do it. Unless you know exactly what you are doing and why, I would advise that you leave the jets alone. If you must re-jet, always use genuine Keihin jets. Many people say they can t think of anything worse than replacing a perfectly good original jet with a smaller or larger cheap aftermarket jet. Genuine Keihin products always carry the Keihin logo on them. Here is an example. Shown above are the air screw and its spring (whose function is to keep the air screw in position).
6 Choke Valve. When closed, no air can enter the carburetor except air through the air pipe. And here is the Venturi opening extending from the air intake side of the carb all the way to the other end. Air Pipe. Supplies air to mix with fuel from the main jet when the choke valve is closed. Air hole (passage) for the air screw. The only air that can be regulated by the air screw must pass through this hole. We ve done the bottom and middle of the carburetor so let s take a look at what we find at the top. Once you ve removed the top cap, here is what you ll see: Tanged Washer
7 Pry open the tanged washer and remove the hex screw (bolt). Now the throttle valve and the link arm can be removed. They look like this: THROTTLE VALVE LINK ARM: The many components of the link arm.
8 Before explaining what is what on the throttle valve and how it works, let s take a look at its components: Throttle Valve Needle. Throttle Valve And here is a close-up of the needle itself: Notice the taper in the needle.
9 We need a look at two more things before putting the picture together. Looking down into the carburetor s body where the throttle valve came out of, here is what we see: Notice the hole in the middle with the brass material around it. This brass piece (at the bottom of which is the main jet) is called an emulsion tube and looks like this:
10 Okay. Too many components, indeed, but a very easy to understand function. As the throttle valve moves up and down in the carburetor s body (it s a snug fit), the needle moves in and out of the emulsion tube (whose job is to help turn the fuel into tiny droplets, vaporize it so to speak or as they call it sometimes, atomize it. It s much easier to ignite vaporized fuel). Because the needle is tapered, it allows more fuel to come out of the bowl when the needle moves up and less fuel to come out when the needle moves down. The needle s movement up and down is directly linked to the throttle grip via the throttle cable, which itself operates the link arm. As you twist the grip, the needle moves up, more fuel comes in, the engine revs up and the bike moves faster. Release the grip and the needle moves down restricting the amount of fuel coming in and consequently slowing the bike. The needle regulates the amount of fuel. But what regulates the amount of the all-important air? The throttle valve does that. As it moves up and down in the Venturi opening (in sync with the needle because they are connected together in one assembly), the throttle valve changes the size of the Venturi opening and that allows more or less air to be sucked in. Again, twist the grip and the throttle valve goes up. More air comes in and more fuel comes in. Exactly what we want. I hope this gives a good argument against plunging ahead and re-jetting your carbs because you put in a new exhaust system or changed the air intake by installing pods or velocity stacks. The main jet, emulsion tube, needle length and taper, the throttle valve shape, degree of taper and height (as well as other factors such as the level of the fuel in the bowl) are all designed carefully by experts in order to ensure the most practical compromise. Changing only a single component (the main jet in the majority of the cases) will certainly impact the performance of all other components and will cause the engine to run less efficiently. Keep in mind that the ideal air to fuel ratio is around 15:1. Carburetors are normally not very good at putting in those 15 parts of air to 1 part of fuel. That s why superchargers, turbo charges, compressors, etc. were developed. To summarize, here is a very crude description of what a carburetor does:
Днепр) Russian Motorcycle Carburetors Part 2B: PZ-24 and PZ-28 Carburetor Assembly and Jet Drilling
Ural (Урал( Урал) - Dnepr (Днепр( Днепр) Russian Motorcycle Carburetors Part 2B: PZ-24 and PZ-28 Carburetor Assembly and Jet Drilling (applies also to K-37 K and K-38 K carbs) Ernie Franke eafranke@tampabay.rr.com
More informationUse these modules to gain valuable knowledge about STIHL policies, procedures and products that will be a benefit to you on the job immediately.
Bronze Level Training Lesson 09 This is Bronze Level 09 of 10. Welcome to the Service Advantage Bronze Level Training on icademy. These modules are designed to enhance your knowledge base on topics such
More informationMotorcycle Carburetor Theory 101
Motorcycle Carburetor Theory 101 Motorcycle carburetors look very complex, but with a little theory, you can tune your bike for maximum performance. All carburetors work under the basic principle of atmospheric
More informationJetting and understanding your CV carburetor
Jetting and understanding your CV carburetor What do all these pieces do? You may also ask, how or why would I do this to my carb? The goal of this article is to unravel the mystery of carburetor jetting
More informationУрал) - Dnepr (Днепр) Russian Motorcycle Carburetors
Ural (Урал( Урал) - Dnepr (Днепр) Russian Motorcycle Carburetors Part 8A: Adjustment and Overhaul of the Pekar K-65 Carburetors (see also Part 8-8 K-65 Carburetor and Part 8B- Setting Up K-65 K Carbs)
More informationFUEL AND LUBRICATION SYSTEM
AND LUBRICATION SYSTEM 4-1 A-PDF Split DEMO : Purchase from www.a-pdf.com to remove the watermark AND LUBRICATION SYSTEM CONTENTS SYSTEM... 4-2 PUMP... 4-2 TANK/ COCK... 4-3 REMOVAL... 4-3 INSPECTION...
More informationTypes of Carburetors. How they work. This presentation is from Virginia Tech and has not been edited by the Georgia Curriculum Office.
Types of Carburetors How they work This presentation is from Virginia Tech and has not been edited by the Georgia Curriculum Office. Performance Objectives Students will be able to list and describe the
More informationAREA 51 - Project Deep Water Foreman!
AREA 51 - Project Deep Water Foreman! Submitted By: Mike Smith of www.shed-headz.com This year marks a very important mile stone for me, that my 1998 Honda Foreman 450s turns 10 years old. Its important
More informationMikuni RS Carburetor Conversion
Mikuni RS Carburetor Conversion After putting your carbies on the bench or the kitchen table if the wife is out, you will see that the linkages may be in different positions depending on which brand of
More informationSimple Carburettor Fuel System for a Piston Engine. And how it works
Simple Carburettor Fuel System for a Piston Engine And how it works Inlet Exhaust Tank PISTON ENGINE Carburettor Fuel System Filler Cap COCKPIT FUEL GAUGE E FUEL 1/2 F Filler Neck Tank Cavity FUEL LEVEL
More informationREBUILDING KEIHIN CARBURETORS
REBUILDING KEIHIN CARBURETORS KEIHIN CARBURETORS (marked 087A and used on 1976 HONDA CB550) PRIOR TO RESTORATION There is a wonderful sense of satisfaction at the end of a carburetor re-building/restoration
More information4. FUEL SYSTEM CK 1 4-0
4 4 4-0 SERVICE INFORMATION... 4-1 FLOAT LEVEL INSPECTION... 4-5 TROUBLESHOOTING... 4-2 CARBURETOR INSTALLATION... 4-6 THROTTLE VALVE DISASSEMBLY... 4-3 THROTTLE VALVE ASSEMBLY... 4-6 CARBURETOR REMOVAL...
More information5. FUEL SYSTEM 5-0 FUEL SYSTEM MXU 250R/300R
5 FUEL SYSTEM 5 SERVICE INFORMATION------------------------------------------------ 5-2 TROUBLESHOOTING----------------------------------------------------- 5-3 FUEL TANK -----------------------------------------------------------------
More informationThe All-New BIG97 Tri-Power. In Detail.
The All-New BIG97 Tri-Power. In Detail. The all-new Stromberg BIG97. On the outside, it s Genuine 97 all the way. But on the inside, we re talking 250cfm, new improved fuel circuits, ported distributor
More informationHOW TO REBUILD HONDA CB550 CARBURETORS
HOW TO REBUILD HONDA CB550 CARBURETORS This is a step by step procedure for a complete rebuild of a set of HONDA CB550 carburetors. It can be used by anybody: from those who just need to do basic maintenance
More informationAutomobile section, showing different parts in detail. and miscellaneous devices.
SECTION VII Nos. 97 112 Automobile section, showing different parts in detail. and miscellaneous devices. Hydraulic jack MECHANICAL MODELS 43 Section VII 97. Automobile engine starter. This device known
More informationHW Prowler Carburetor Installation Instructions
HW Prowler Carburetor Installation Instructions Page 1 of 6 Carb Kit Contains: HW modified Mikuni 36mm pumper style carb Custom choke cable Fuel Line Clamp Instructions (2) Leaner and (2) richer main jets
More informationTHE IDLE CIRCUIT AND THE PROGRESSION. We have seen how in a "basic"
THE IDLE CIRCUIT AND THE PROGRESSION Manufacture and operation of two very important systems, which allow the practical use of a carburetor for motorcycles We have seen how in a "basic" (simplified) carburetor,
More informationTHE IDIOT S GUIDE TO TUNING SU CARBURETTERS
THE IDIOT S GUIDE TO TUNING SU CARBURETTERS There are four distinct phases to tuning SU carburetters (carbies). The first is to set the fuel level in the float bowl, the second is to centre the needle
More informationTuning A Walbro Carb. Walbro Carb TUNE UP & Illustrated Guide
Tuning A Walbro Carb Walbro Carb TUNE UP & Illustrated Guide by M. B. Fuess Walbro carbs aren t too difficult to tune up if you know what you re doing. First of all, you need to know how the carb works
More informationINSIDE YOUR HOLLEY CARBURETOR FUEL INLET SYSTEM
INSIDE YOUR HOLLEY CARBURETOR The carburetor is quite simply a fuel metering device that operates under the logical and straightforward laws of physics. It has evolved over the years from a very simple
More informationFuel tutor notes. What students will learn. check fuel tanks, lines and primers. check and replace fuel filters. know about safety with fuel
Fuel tutor notes Fuel Tutor notes Tutor What students will learn When they have finished the Fuel module, students should be able to: Choose the right fuel for their engine mix the right petrol and oil
More information4. FUEL SYSTEM 4-0 FUEL SYSTEM NEXXON 50
4 FUEL SYSTEM SERVICE INFORMATION ------------------------------------------------ 4-2 TROUBLESHOOTING----------------------------------------------------- 4-3 AIR CLEANER REMOVAL -----------------------------------------------
More informationTHE FOUR STROKE CYCLE BUT HOW DOES IT WORK EXACTLY? LET S LOOK IN MORE DETAIL 1. INDUCTION SUCK 2. COMPRESSION 3. COMBUSTION 4.
THE FOUR STROKE CYCLE BUT HOW DOES IT WORK EXACTLY? WE KNOW ABOUT:- WHICH WE KNOW AS:- LET S LOOK IN MORE DETAIL 1. INDUCTION SUCK 2. COMPRESSION 3. COMBUSTION 4. EXHAUST SQUEEZE BANG BLOW Inlet valve
More informationSherco Carb Jetting Instructions
Sherco Carb Jetting Instructions This manual provides instructions on how to remove and reinstall the stock carburetor, it also shows you how to change the pilot jet and the main jet. It is intended to
More information13. FUEL SYSTEM/CARBURETOR/
13 FUEL SYSTEM/CARBURETOR/FUEL PUMP FUEL SYSTEM --------------------------------------------------------- 13-1 SCHEMATIC DRAWING ---------------------------------------------- 13-2 OPERATION OF CARBURETOR
More information"F" SERIES (Cont.) AIR FILTER ASSEMBLY NOTE NOTE. To remove grasp the cover, loosen snap and. If engine is flooded, fuel can drain back into
CARB.-AIR-FILTER ASSEMBLY GASKET RETAINER PASSAGE AIR FILTER ASSEMBLY AIR FILTER If engine is flooded, fuel can drain back into filter. As filter becomes saturated, incoming air picks up more fuel, causing
More information03. Fuel and Air Feed System
Page 11 of 03. Fuel and Air Feed System Content (16 Marks) 3.1 Petrol fuel supply system. 8 Marks Conventional Petrol Engine: Gravity feed, Pump feed (Layout,Function of Components and location). Construction
More informationJOB AID INTRODUCTION TOOLS REQUIRED: GC160 GC190 GS190 GCV160 GCV190 GSV160 GSV190 CARBURETOR CLEANING
JOB AID GC160 GC190 GS190 GCV160 GCV190 GSV160 GSV190 CARBURETOR CLEANING INTRODUCTION Service engineering has discovered that many GCV carburetors returned for warranty were improperly cleaned. Eighty
More informationPhil s Ear Shave Procedure
http://06vn750.blogspot.com/2011/05/ear-shave-procedure-different-format.html 06VN750 Thursday, May 19, 2011 Ear Shave Procedure Phil s Ear Shave Procedure Preface: GENERALLY speaking: If you change the
More information5. FUEL SYSTEM FUEL SYSTEM 5-0
5 FUEL SYSTEM 5-0 SERVICE INFORMATION GENERAL INSTRUCTIONS SERVICE INFORMATION...5-1 CARBURETOR INSTALLATION...5-9 TROUBLESHOOTING...5-1 PILOT SCREW ADJUSTMENT...5-10 CARBURETOR REMOVAL...5-2 AUTO BYSTARTER...5-3
More informationEngine Project. These engines are typically used in lawn mowers, snow blowers, go-carts, etc
Engine Project Your team is going to dissect and assemble a 3.5 HP single cylinder, 4 cycle engine, made by Briggs and Stratton in Milwaukee, Wisconsin These engines are typically used in lawn mowers,
More informationExhaust Gas CO vs A/F Ratio
Title: Tuning an LPG Engine using 2-gas and 4-gas analyzers CO for Air/Fuel Ratio, and HC for Combustion Efficiency- Comparison to Lambda & Combustion Efficiency Number: 18 File:S:\Bridge_Analyzers\Customer_Service_Documentation\White_Papers\18_CO
More informationCarburetor Instructions
Carburetor Instructions for HUDSON SUPER SIX ESSEX SIX CYLINDER Hudson Motor Car Co. DETROIT, U.S.A. Carburetor The carburetor is a device for metering correct amounts of fuel and air for the various
More informationTHE CARBURETOR: THE ADDITIONAL SYSTEMS
THE CARBURETOR: THE ADDITIONAL SYSTEMS From the acceleration pump to the power jet: the special configuration of circuits that apply to some carburetor models As stated in the previous article, a carburetor
More informationWEBER CARBURETOR TROUBLESHOOTING GUIDE
This guide is to help pinpoint problems by diagnosing engine symptoms associated with specific vehicle operating conditions. The chart will guide you step by step to help correct these problems. For successful
More informationSetting up and adjusting SU/Hitachi carbs on the Datsun Roadster by Keith Williams. Service screw
Setting up and adjusting SU/Hitachi carbs on the Datsun Roadster by Keith Williams Service screw This is the service screw it s only use it to raise the engine speed while adjusting the carbs. In normal
More informationHonda Accord/Prelude
Honda Accord/Prelude 1984-1995 In Tank Fuel Pumps TEST 1. Turn the ignition OFF. 2. On the Accord, remove the screws securing the underdash fuse box to its mount. Remove the fuel cut off relay from the
More informationSECTION 4 - FUEL SYSTEMS AND CARBURETION
SECTION - FUEL SYSTEMS AND CARBURETION FUEL SYSTEMS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -62 FUEL PUMP - - - - - - -
More informationI.C Engine Topic: Fuel supply systems Part-1
I.C Engine Topic: Fuel supply systems Part-1 By: Prof.Kunalsinh Kathia Essential parts of carburetor Fuel strainer Float chamber Metering and idiling system Choke and throttle Fuel strainer As gasoline
More informationHSR Carburetor. Total Kits. Installation Instructions. # Evo Big Twin # present Twin Cam
HSR Carburetor Total Kits Installation Instructions HSR42 Kits: HSR45 Kits: #42-8 84-99 Evo Big Twin #42-19 99 - present Twin Cam #45-2 84-99 Evo Big Twin #45-3 84-99 Evo Big Twin #45-4 99 - present Twin
More informationBasic Requirements. ICE Fuel Metering. Mixture Quality Requirements. Requirements for Metering & Mixing
Basic Requirements ICE Fuel Metering Dr. M. Zahurul Haq Professor Department of Mechanical Engineering Bangladesh University of Engineering & Technology (BUET) Dhaka-1000, Bangladesh zahurul@me.buet.ac.bd
More informationPractical Exercise for Instruction Pack 2. Ed Abdo
Practical Exercise for Instruction Pack 2 By Ed Abdo About the Author Edward Abdo has been actively involved in the motorcycle and ATV industry for over 25 years. He received factory training from Honda,
More informationHSR Carburetor. Total Kits. Installation Instructions. # Evo Big Twin # present Twin Cam
HSR Carburetor Total Kits Installation Instructions HSR42 Kits: HSR45 Kits: #42-8 84-99 Evo Big Twin #42-19 99 - present Twin Cam #45-2 84-99 Evo Big Twin #45-3 84-99 Evo Big Twin #45-4 99 - present Twin
More informationBackwater Performance Systems Large Vanguard Mikuni Twin Carburetor Kit
Backwater Performance Systems Large Vanguard Mikuni Twin Carburetor Kit 1. Throttle Cable Twin (CKC-41) 2. Carburetor VM30mm (CKC-40) 3. Loctite 242.5mL (A-210) 4. Air Cleaner Filter 6000 (EC-86) 5. Rev
More informationUral (Урал) - Dnepr (Днепр) Russian Motorcycle Carburetors. Ernie Franke 05/2011
Ural (Урал) - Dnepr (Днепр) Russian Motorcycle Carburetors Part 2: K-37 K and K-37AK Ernie Franke eafranke@tampabay.rr.com 05/2011 K-37 and K-37A K Carburetor Used in Dnepr M-72, MB-750 and K-750 750 cc
More informationUNDERSTANDING 5 GAS DIAGNOSIS
UNDERSTANDING 5 GAS DIAGNOSIS AND EMISSIONS Gas Diagnostic Steps This procedure will help in your efforts to figure out what the five-gas reading are telling you. In order for five gas analyses to be conclusive
More informationSPECIFICATIONS 4.1 ITEM TORQUE NOTES. Air Cleaner Cover Screws in-lbs Nm LOCTITE THREADLOCKER 222 (purple), page 4-21
4 SPECIFICATIONS 4.1 CARBURETOR JET SIZES CARBURETOR ADJUSTMENTS Main Jet 195 Slow Jet 42 FUEL TANK CAPACITY GALLONS LITERS Total (including reserve) 5.0 18.93 Reserve 0.6 2.2 Engine Fast Idle Speed (using
More informationDo not bend or twist the control cable. Damaged control cable will not operate smoothly and may stick or bind.
XL200 4. FUEL SYSTEM SERVICE INFORMATION 4-1 TROUBLESHOOTING 4-2 CARBURETOR 4-3 PILOT SCREW ADJUSTMENT 4-14 ACCELERATOR PUMP ADJUSTMENT 4-15 AIR CLEANER HOUSING 4-15 FUEL TANK 4-16 SERVICE INFORMATION
More informationAN EXPLANATION OF CIRCUITS CARTER YH HORIZONTAL CLIMATIC CONTROL CARBURETER
AN EXPLANATION OF CIRCUITS CARTER YH HORIZONTAL CLIMATIC CONTROL CARBURETER The Carter Model YH carbureter may be compared with a Carter YF downdraft carbureter with the circuits rearranged to operate
More informationДнепр) Russian Motorcycle Carburetors Part 11: VM 28mm Mikuni
Ural (Урал( Урал) - Dnepr (Днепр( Днепр) Russian Motorcycle Carburetors Part 11: VM 28mm Mikuni (See Also Part 11A: VM Mikuni Carb Manual) Ernie Franke eafranke@tampabay.rr.com 04/2011 Mikuni VM-28 Round-Slide
More informationPrerequisites: Shop Manual (recommended) pages 3-9 through 3-13.
Prerequisites: Order your gaskets average about $25.00 bucks X 2 so $50.00 4NK-11193-00-00 Obtain a shim kit (Should have several 265 and 270s) (Some dealers will exchange) Obtain a Valve Bucket Tool YM-33961
More informationVM Carb Rebuild Paul Musser October 2005 v1.0
VM Carb Rebuild Paul Musser October 2005 v1.0 A big thank you to all the folks at GS Resources (www.thegsresources.com) for their invaluable assistance. Much of the information for his document came from
More informationunit 10 lubricating systems
FUEL TANK unit 10 lubricating systems An engine needs oil between its moving parts. The oil keeps the parts from rubbing on each other. When the parts do not rub on each other they do not wear out as quickly.
More informationHandout Activity: HA170
Basic diesel engine components Handout Activity: HA170 HA170-2 Basic diesel engine components Diesel engine parts are usually heavier or more rugged than those of similar output gasoline engines. Their
More informationSPECIFICATIONS ITEM TORQUE NOTES. Air cleaner backplate screw 7-9 ft-lbs Nm LOCTITE THREADLOCKER 242 (blue), page 4-19
4 SPECIFICATIONS CARBURETOR JET SIZES CARBURETOR ADJUSTMENTS Main jet 195 Slow jet 42 FUEL TANK CAPACITY GALLONS LITERS Total (including reserve) 4.0 15.14 Reserve 0.6 2.27 Engine fast idle speed (using
More informationInternal Combustion Engines
Internal Combustion Engines The internal combustion engine is an engine in which the burning of a fuel occurs in a confined space called a combustion chamber. This exothermic reaction of a fuel with an
More information2) Rich mixture: A mixture which contains less air than the stoichiometric requirement is called a rich mixture (ex. A/F ratio: 12:1, 10:1 etc.
Unit 3. Carburettor University Questions: 1. Describe with suitable sketches : Main metering system and Idling system 2. Draw the neat sketch of a simple carburettor and explain its working. What are the
More information12. CARBURETOR 12-0 CARBURETOR VITALITY 50
12 12 CARBURETOR SERVICE INFORMATION (2-STROKE)... 12-2 SERVICE INFORMATION (4-STROKE)... 12-3 THROTTLE VALVE (2-STROKE)... 12-5 CARBURETOR (2-STROKE)... 12-7 AIR SCREW ADJUSTMENT (2-STROKE)... 12-13 REED
More informationFUEL SYSTEM/CARBURETOR/FUEL PUMP
13 FUEL SYSTEM/CARBURETOR/FUEL PUMP FUEL SYSTEM-------------------------------------------------------------------------------------13-1 SCHEMATIC DRAWING-------------------------------------------------------------------------13-2
More informationMIXTURE FORMATION IN SPARK IGNITION ENGINES. Chapter 5
MIXTURE FORMATION IN SPARK IGNITION ENGINES Chapter 5 Mixture formation in SI engine Engine induction and fuel system must prepare a fuel-air mixture that satisfiesthe requirements of the engine over its
More informationTECH INFORMATION EMPI D Performance 2-Barrel Carburetor
TECH INFORMATION EMPI D Performance 2-Barrel Carburetor The New EMPI D 2-Barrel Performance Carburetor.Built specifically for the VW Aftermarket. With all the features that you have asked for More Progression
More informationWide Band EFIE Installation Instructions. Locate the wide band oxygen sensor current wire
Wide Band EFIE Installation Instructions Install your fuel efficiency device The EFIE is not intended to be a fuel saver by itself. You should install a device that is designed to get more energy out of
More informationVacuum Readings for Tuning and Diagnosis
Vacuum Readings for Tuning and Diagnosis -Henry P. Olsen Once you learn to properly interpret its readings, a vacuum gauge can be one of the most useful tools in your toolbox. 22 FEATURE Some people consider
More informationMAXI-BORE TM CARBURETTORS
MAXI-BORE TM CARBURETTORS 26mm/28mm Mik bored to 30.5mm 33mm Smoothbores bored to 38.5mm Don t just rebuild your carbs MAXI-BORE TM them! MAXI-BORE TM carbs are more than just cleaned, rebuilt, or bored,
More informationBronze Level Training
Bronze Level Training Engine Principles of Operation While not everyone at the dealership needs to be a top rated service technician, it is good for all the employees to have a basic understanding of engine
More informationThrottle Setup by Jason Priddle
Throttle Setup by Jason Priddle This article is written around JR Radio convention. The numbers noted are for illustrative purposes, and the same principles apply to all radios Ever feel like all your
More informationThermo-Bob 3 Installation on a 2015-and-newer Versys 650
Thermo-Bob 3 Installation on a 2015-and-newer Versys 650 Thank you for purchasing the Thermo-Bob 3 radiator bypass system for the Kawasaki Versys 650. Proper installation is critical: if you are not familiar
More informationInstallation Instructions Jeep CJ-7
Retrofit Steering Column Installation Instructions 1976-86 Jeep CJ-7 For Part # s 1520800010, 152800020, 1520800051 www.ididitinc.com 610 S. Maumee St., Tecumseh, MI 49286 (517) 424-0577 (517) 424-7293
More informationInduction, Cooling, & Exhaust Aviation Maintenance Technology
Induction, Cooling, & Exhaust Aviation Maintenance Technology INDUCTION Induction = There are two basic types 1. 2. Non-supercharged components 1. 2. 3. 4. 5. 6. 7. 8. Air Scoop Air filters. Ducting Hot
More informationFUEL LEVELS (and how to set them)
FUEL LEVELS (and how to set them) 1 Before we begin, it should be known that this writeup is not intended to provide detailed instructions on breaking down and cleaning the carbs; by this point, your carbs
More informationCARBURETOR. Preliminary Check. Removal of DuraForce Carburetor
Fuel Leaks From Carburetor (Leaking starts after running, stops after shutdown) Note: This condition which does NOT drain the fuel tank is called spit-back. Possible Causes Engine RPM out of proper range
More information11. CARBURETOR 11-0 CARBURETOR ZX / SCOUT 50
11 CARBURETOR SERVICE INFORMATION... 11-2 TROUBLESHOOTING... 11-2 THROTTLE VALVE DISASSEMBLY... 11-3 THROTTLE VALVE INSTALLATION... 11-4 CARBURETOR REMOVAL... 11-5 AUTO BYSTARTER... 11-6 FLOAT CHAMBER...
More informationInternal Combustion Engines.
Internal Combustion Engines. Here's a quick description of a typical internal combustion engine, along with basic vocabularies that describe the components and their functions. This stuffs serve as a quick
More informationCommon Terms Types of Intake Manifolds... 5
INDUCTION SYSTEMS Common Terms... 2 Plenum... 2 Helmholtz Resonator... 2 Intake Runners... 2 Carburetor Spacers... 2 Individual Runners (IR)... 2 Tuned Port... 3 Manifold Heat... 3 Venturi... 3 Booster
More informationHE Stewart Vacuum Gasoline System employs a small tank, installed under the hood. This tank is connected by brass tubing to the intake manifold, also
T HE Stewart Vacuum Gasoline System employs a small tank, installed under the hood. This tank is connected by brass tubing to the intake manifold, also to gasoline supply tank, and to carburetor. Every
More informationInside a typical car engine. Almost all cars today use a reciprocating internal combustion engine because this engine is:
Tech Torque HOW PETROL ENGINES WORK The Basics The purpose of a gasoline car engine is to convert gasoline into motion so that your car can move. Currently the easiest way to create motion from gasoline
More informationRetro it Steering Column
Retro it Steering Column INSTALLATION INSTRUCTIONS for 1976-86 CJ5 & CJ7 FOR PART NUMBER S: 1520800010, 1520800020, 1520800051, 1526800010, 1526800020, 1526800051 S I NCE 1986 Instruction # 8000000010
More informationOBJECTIVE: GENERAL ASPECTS ABOUT ENGINES MECHANISM:
LANDMARK UNIVERSITY, OMU-ARAN LECTURE NOTE 3 COLLEGE: COLLEGE OF SCIENCE AND ENGINEERING DEPARTMENT: MECHANICAL ENGINEERING Course code: MCE 211 Course title: Introduction to Mechanical Engineering Credit
More informationGASOLINE DIRECT INJECTION IN SI ENGINES B. PAVAN VISWANADH P. ASHOK KUMAR. Mobile No : Mobile No:
GASOLINE DIRECT INJECTION IN SI ENGINES SUBMIT TED BY B. PAVAN VISWANADH P. ASHOK KUMAR Y06ME011, III/IV B. Tech Y06ME003, III/IV B. Tech Pavan.visu@gmail.com ashok.me003@gmail.com Mobile No :9291323516
More informationSpiritPFC Torque/Horsepower Comparison Dynamometer Test Date: 5/7/2006
SpiritPFC / Comparison Dynamometer Test Date: 5/7/2006 Dynamometer Test Outline: Contained within this document you will find data collected using a Dyno Datamite engine dynamometer hardware and software
More information1 In all circumstances, it can be easily ignited by the spark. 2 The maximum possible amount of chemical energy can be
SIE: Requirements for Metering & Mixing ICE Fuel Metering Dr. Md. Zahurul Haq Professor Department of Mechanical Engineering Bangladesh University of Engineering & Technology (BUET) Dhaka-1000, Bangladesh
More informationCARBURETOR SERVICE INFORMATION TROUBLESHOOTING THROTTLE VALVE DISASSEMBLY THROTTLE VALVE INSTALLATION...
11 CARBURETOR SERVICE INFORMATION... 11-2 TROUBLESHOOTING... 11-2 THROTTLE VALVE DISASSEMBLY... 11-3 THROTTLE VALVE INSTALLATION... 11-4 CARBURETOR REMOVAL... 11-5 AUTO BYSTARTER... 11-6 FLOAT CHAMBER...
More information3. Fuel System FUEL SYSTEM FUEL INJECTION (FUEL SYSTEM) A: GENERAL. FU(STi)-7
W1860BE.book Page 7 Tuesday, January 28, 2003 11:01 PM 3. Fuel System A: GENERAL The fuel pressurized by the fuel tank inside pump is delivered to each fuel injector by way of the fuel pipe and fuel filter.
More informationI suggest you read through this guide first to familiarise yourself with what you need to do before doing it. Let s get into it!
This guide was written for those with standard (or close to standard) NC30 s that have yet to get up close and friendly with their bike s fuelling system. It was put together using a few different bikes
More informationTask 4: Read the texts, look at the illustrations and do the activities below.
Task 4: Read the texts, look at the illustrations and do the activities below. 4 BASIC OPERATIONS The Induction Stroke On the induction stroke, the inlet valve opens and the piston, moving down, creates
More informationThe Zenith Stromberg Water Choke
Page 1 of 16 The Zenith Stromberg Water Choke Rick Jaskowiak Bemidji, MN 11/24/2001 Click here to email me. Return to my home page When my last Midget project ran poorly after an engine rebuild due to
More informationTwo Cycle and Four Cycle Engines
Ch. 5 Two Cycle and Four Cycle Engines Feb 20 7:43 AM 1 Stroke of the piston is its movement in the cylinder from one end of its travel to the other Feb 20 7:44 AM 2 Four stroke cycle engine 4 strokes
More informationQUICK FUEL TECHNOLOGY HOT ROD SERIES CARBURETORS SLAYER SERIES CARBURETORS SUPER STREET SERIES CARBURETORS
QUICK FUEL TECHNOLOGY Installation Instructions HOT ROD SERIES CARBURETORS SLAYER SERIES CARBURETORS SUPER STREET SERIES CARBURETORS HR-580-VS 580 CFM Vac. Secondary!!! SS-680-VS 680 CFM Vac. Secondary
More informationEngine Construction and Principles of Operation
Ch. 4 Engine Construction and Principles of Operation Gasoline Engine A gasoline fueled engine is a mechanism designed to transform chemical energy into mechanical energy It is an internal combustion engine.
More informationINSTALLATION INSTRUCTIONS
INSTALLATION INSTRUCTIONS PERFORMANCE AT THE WHEELS KITS W156-6 & W156-7 1965-74 MOPAR B & E BODY Thank you for choosing STAINLESS STEEL BRAKES CORPORATION for your braking needs. Pleases take the time
More informationHSR Carburetor Easy Kits Installation Instructions For Evo Big Twin Kit: # 42-7 Twin Cam Kit: # 42-18
HSR Carburetor Easy Kits Installation Instructions For Evo Big Twin Kit: # 42-7 Twin Cam Kit: # 42-18 Revised 5/01/01 EK-1 Easy Kit Installation Instructions The HSR series carburetors are precise yet
More informationENGINES ENGINE OPERATION
ENGINES ENGINE OPERATION Because the most widely used piston engine is the four-stroke cycle type, it will be used as the example for this section, Engine Operation and as the basis for comparison in the
More informationFit a Japanese Regulator Rectifier unit to a 12v AC/DC Royal Enfield Bullet
Fit a Japanese Regulator Rectifier unit to a 12v AC/DC Royal Enfield Bullet The standard, seperate regulator and rectifier units on the later model Royal Enfield Bullet are not noted for their reliability.
More informationTwoStep linkage. Installation guide Read this first. 2. Tools required for installation WARNING!
TwoStep linkage Installation guide HOT ROD CARBURETION CLOTHING & COLLECTIBLES SERVICE PARTS LINKAGE & FUEL DELIVERY If you need further information or assistance, please contact your Genuine Stromberg
More informationSales : Mobile : The Zenith 24 T-2 carburettor
The Zenith 24 T-2 carburettor is an up draught carburettor, developed principally for use on your Ferguson TEA20 (Vaaljapie) tractor. It can be supplied in several versions, the main variations being the
More informationBASIC INSTRUCTIONS SHIFTER KZ1 / KZ2 e X30 SHIFTER-TaG
BASIC INSTRUCTIONS SHIFTER KZ1 / KZ2 e X30 SHIFTER-TaG FEEDING: by fuel mixture 98NO (min. 95NO) and 4% oil (CIK homologated). ATTENTION: the engine is supplied without oil in the gearbox. GEARBOX OIL
More informationTONY S TECH REPORT. Basic Training
TONY S TECH REPORT (Great Articles! Collect Them All! Trade them with your friends!) Basic Training OK YOU MAGGOTS!! Line up, shut up, and listen good. I don t want any of you gettin killed because you
More informationAdjusting Carbs For Re-Jetting (Procedure written for an Intruder 1500 LC) NEWLY UPDATED: APRIL 2003
SECTION ONE: Get Prepared - Tools Adjusting Carbs For Re-Jetting (Procedure written for an Intruder 1500 LC) NEWLY UPDATED: APRIL 2003 Courtesy of: Half-Crazy Get a manual impact driver (the kind you hit
More informationTILLOTSON LTD., CLASH INDUSTRIAL ESTATE, TRALEE, CO. KERRY, IRELAND PHONE: FAX:
TILLOTSON LTD., CLASH INDUSTRIAL ESTATE, TRALEE, CO. KERRY, IRELAND PHONE: +353 66 7121911 FAX: +353 66 7124503 e-mail: sales@tillotson.ie HU SERIES SERVICE MANUAL INTRODUCTION To keep apace of new market
More information