Please note that any machine outside the specifications may be put into a consolation class. This class will not receive any school points nor prizes.

Transcription

1 New Zealand National Secondary Schools Minibike Racing Club Inc. Specifications of Bike Classes. Standard Air-Cooled Bikes: 50CC. Aim: To encourage accurate construction and provide a predetermined overall standard so no competitor can obtain an unfair advantage, by unacceptable modifications. This may be determined by the specifications committee. Please note that any machine outside the specifications may be put into a consolation class. This class will not receive any school points nor prizes. 1 Frames: All frames must be of mild steel construction and made in the school workshop with suitably braced headstock. No commercial frames allowed. 1.1 Bare metal steel frames must be protected from the elements i.e. painted, powder coated etc 1.2 Racing numbers to be visible on the front of the minibike for identification purposes. 2 Front Forks/Head stocks or Triple clamps: Steel or alloy construction, produced by the student. No commercial components allowed. This includes any Triple clamps supplied with the kit. HEAD STOCK ANGLES. SHOULD BE BETWEEN 22 TO 25 DEGREES. Angles greater than 25 degrees will be placed in the Out of Specs consolation class. 2.1 Triple clamps must be produced by the students in a school workshop environment. 50cc Motard triple clamps that come with the kit can be copied but not used. 3 Engines: The standard RSA115 engine is the only acceptable engine in this class, in 50cc form. The engine cannot be modified in any way, this includes the following: No alterations to the engine s transfer ports or adding of extra ports. This includes inlet and exhaust ports. No alterations to the combustion chamber that will result in a change of compression ratio The replacement of the standard steel reed valve with a carbon fibre or glass fibre replacement is not acceptable. Alteration of the ignition timing by the use of timing keys is not allowed. Lightening of the flywheel is not allowed, this includes removal of cooling fins. Race ignition coils are not acceptable. 4 Carburettor/ Fuel Tank, Air filter: The standard E3 carburettor of the round piston type is the only acceptable variant. No flat slide carbs. No intentional modification or adjustment of standard jet size needles (no drilling, filing or other intentional modification) No adjustable carb needle jets. The standard air filter as supplied with the NRCD Kit can be used. FUEL TANKS MUST BE RETAINED IN A WAY SO THAT WHEN THE FUEL CAP IS REMOVED THE TANK CANNOT FALL OUT OF THE SEAT UNIT. Note: A tight fit into the seat unit is not good enough. 1 Copyright 2019 N.Z.N.S.S.M.B.R.C.INC.

2 5 Gearing and Clutches: Acceptable gear ratios are. 6 x 68 7 x 68 8 x 68 Clutches should be of the standard type. Adjustable race style will not be allowed. ENGINE DRIVE SPROCKETS MUST BE COVERED TO PREVENT STUDENT BODY PARTS FROM HITTING THE CHAIN DURING OPERATION. 6 Exhausts: The only acceptable system will be the small black system as supplied in the Newmanz kits unmodified. No aftermarket exhausts. No S shaped expansion chambers. 7 Leading Dimensions: Maximum wheel base 850mm. Measured from the centre of the front axle to the centre of the rear axle. ANY MACHINES WITH A WHEEL BASE THAT EXCEEDS THE MAXIMUM BY MORE THAN 10 MM WILL BE PUT IN THE OUT OF SPECS CONSOLATION CLASS. Maximum seat height 500mm measured from a point immediately to the rear of the fuel tank, on top of the seat. Maximum height to front yoke 550mm. Not including fairing. Maximum handlebar height to highest point from ground 560mm. [10mm above top yoke] Maximum width of handlebars is 550mm. HANDLE BARS MAY NOT BE FITTED LOWER THAN THE BOTTOM TRIPLE CLAMP/BOTTOM YOKE. RIDING/ SEATING POSITION. The riders foot pedals will be fastened to the frame. The foot rests may not be any further backwards than 150 mm behind the engine drive gear and 150 forward of the rear axle. Foot rests in awkward positions, as decided upon by the testers, will be forwarded to the Specifications/ safety committee. 8 Brakes/ Axles. Standard brake calliper s, one only fitted to the front and rear wheels. Front/rear wheels must both be braked. REAR AXLE RETAINING NUTS MUST BE HELD IN PLACE WITH SUITABLE LOCKING DEVICES. For example: Use of castellated nuts and split pins, use of new nylock nuts, drilled axle and wired, R clips, drilled axle and wiring to rear fork. Any of the above locking devices can be used to prevent movement of the rear axle during use whilst racing and to prevent movement of set chain adjustment. 9 Attention: It is not our intention to stop the pupils from innovating or to dampen their enthusiasm. Far from it, we will actively encourage that sort of approach. We wish that pupils who spend money and modify their machines do so in a spirit of honesty and fair play. To this end they should enter the modified air-cooled class. The organising committee will reserve the right to request that the first 3 placed bikes in any standard class be dismantled and inspected at the conclusion of racing and before prizes are presented. If any modifications occur, the student will be disqualified, all points will be forfeited, and they will be excluded from participating in the following years event. The committee s decision will be final. A standard gasket set will be provided so the student can reassemble the bike at no cost to the student. 2 Copyright 2019 N.Z.N.S.S.M.B.R.C.INC.

3 All competitors need to have riding experience practice to ensure stable riding control before orientation laps at the race circuit Handle bar ends must be plugged and foot pegs with rounded ends. All competitors need to have riding experience practice to ensure stable riding control before orientation laps at the race circuit. 3 Copyright 2019 N.Z.N.S.S.M.B.R.C.INC.

4 Classification of Modified Air-Cooled Bikes: Aim: To encourage accurate construction and provide a predetermined overall standard so no competitor can obtain an unfair advantage, by unacceptable modifications. This may be determined by the specifications committee. Please note that any machine outside the specifications may be put into a consolation class. This class will not receive any school points nor prizes. 1 Frames: All frames must be of mild steel construction and made in the school workshop with suitably braced headstock. No commercial frames allowed. Bare metal steel frames must be protected from the elements i.e. painted, powder coated etc Racing numbers to be visible on the front of the minibike for identification purposes. Handle bar ends must be plugged. Footrests must be rounded. Racing numbers must be visible 2 Front Forks/Head stocks or Triple clamps: Steel or alloy construction, to be produced by the student. No commercial components allowed. FORK ANGLES / HEAD STOCK ANGLES AS STANDARD AIR-COOLED FRAMES DEGREES. 3 Engines: The RSA115 engine is the only acceptable engine in this class. The engine can be modified in any way. MODIFIED BIKES MUST ENTER THE MODIFIED CLASS. 4 Carburettor/Air filter/ Fuel tank. Carb air filter Completely open. Fuel tank fitment as standard air-cooled i.e.. fuel tank must be retained in a way so that when the fuel cap is removed the tank cannot fall out of the seat unit a tight fit into the seat unit it not good enough. 4 Copyright 2019 N.Z.N.S.S.M.B.R.C.INC.

5 5 Gearing and Clutches: Gear ratios are over to the student. Adjustable race style clutches are allowed. DRIVE SPROCKETS MUST BE COVERED TO PROTECT THE RIDER. 6 Exhausts: Any system will be acceptable, after market exhausts and S shaped expansion chambers can be used. 7 Leading Dimensions: Maximum wheel base 850mm. Measured from the centre of the front axle to the centre of the rear axle. AXLE POSITION NO MORE THAN 10 MM OUTSIDE SPECIFICATIONS. FOOT REST POSITION AS STANDARD BIKES, 150 MM BEHIND DRIVE GEAR AND 150 FORWARD OF THE REAR AXLE. Maximum seat height 500mm measured from a point immediately to the rear of the fuel tank, on top of the seat. Maximum height to front yoke 550mm. Not including fairing. Maximum handlebar height to highest point from ground 560mm. [10mm above top yoke] Maximum width of handlebars is 550mm. HANDLE BARS Mounted NO LOWER THAN BOTTOM TRIPLE CLAMP. 8 Brakes Axle s: Front/rear wheels must be braked. REAR AXLE NUTS MUST BE WIRED. Nylock nuts are acceptable. 5 Copyright 2019 N.Z.N.S.S.M.B.R.C.INC.

6 Classification of Modified Water Cooled Bikes: : To encourage accurate construction and provide a predetermined overall standard so no competitor can obtain an unfair advantage, by unacceptable modifications. This may be determined by the specifications committee. Please note that any machine outside the specifications may be put into a consolation class. This class will not receive any school points nor prizes. 1 Frames: All frames must be of mild steel construction and made in the school workshop with suitably braced headstock. Handle bar ends must be plugged, & footrests rounded. No commercial frames allowed. 2 Front Forks/Head stocks or Triple clamps: Steel or alloy construction to be produced by the student. No commercial components allowed. 3 Engines: The basic 38cc. water-cooled engine is the only acceptable engine in this class. The engine can be modified in any way. 50cc, Big bore kits can be used. BUT MUST BE ENTERED IN THE MODIFIED CLASS 4 Carburettor/Air filter: Completely open. 5 Gearing and Clutches: Gear ratios are over to the student. Adjustable race style clutches are allowed. 6 Exhausts: 6 Copyright 2019 N.Z.N.S.S.M.B.R.C.INC.

7 Any system will be acceptable, after market exhausts and S shaped expansion chambers are to be encouraged. 7 Leading Dimensions: Maximum wheel base 850mm. Measured from the centre of the front axle to the centre of the rear axle. AXLE POSITION NO MORE THAN 10 MM OUTSIDE SPECIFICATIONS. FOOT REST POSITION AS STANDARD BIKES, 150 MM BEHIND DRIVE GEAR. Maximum seat height 500mm measured from a point immediately to the rear of the fuel tank, on top of the seat. Maximum height to front yoke 550mm. Not including fairing. Maximum handlebar height to highest point from ground 560mm. [10mm above top yoke] Maximum width of handlebars is 550mm. HANDLE BARS Mounted NO LOWER THAN BOTTOM TRIPLE CLAMP. 8 Brakes: Front/rear wheels must be braked. REAR AXLE NUTS MUST BE WIRED. 7 Copyright 2019 N.Z.N.S.S.M.B.R.C.INC.

8 Classification of Standard Water Cooled Bikes: Aim: : To encourage accurate construction and provide a predetermined overall standard so no competitor can obtain an unfair advantage, by unacceptable modifications. This may be determined by the specifications committee. Please note that any machine outside the specifications may be put into a consolation class. This class will not receive any school points nor prizes. To encourage accurate construction and provide a predetermined overall standard so no competitor can obtain an unfair advantage, by unacceptable modifications. This may be determined by the specifications committee. 1 Frames: All frames must be of mild steel construction and made in the school workshop with suitably braced headstock. No commercial frames allowed. 2 Front Forks/Head stocks or Triple clamps: Steel or alloy construction produced by the student and made in the School Workshop. No commercial components allowed. 3 Engines: The standard water-cooled engine is the only acceptable engine in this class, in 38cc form. The engine cannot be modified in any way. No alterations to the combustion chamber. No alterations to the compression ratio. The replacement of the standard steel reed valve with 8 Copyright 2019 N.Z.N.S.S.M.B.R.C.INC.

9 a carbon fibre or glass fibre replacement is not acceptable. Alteration of the ignition timing by the use of timing keys is not allowed. Lightening of the flywheel is not allowed. Race ignition coils are not acceptable. 4 Carburettor/Air filter: The standard carburettor of the flat side type is the only acceptable type. No alteration to the carb jets. No adjustable carb needle jets. The standard pod filter supplied with the kit is to be used. 5 Gearing and Clutches: As supplied in the kit. 6 Exhausts: The only acceptable system is the water-cooled expansion chamber as supplied by Newmanz. 7 Leading Dimensions: Maximum wheel base 850mm. Measured from the centre of the front axle to the center of the rear axle. Maximum seat height 500mm measured from a point immediately to the rear of the fuel tank, on top of the seat. Maximum height to front top yoke 550mm. Not including fairing. Maximum handlebar height to highest point from ground 560mm. [10mm above top yoke] Maximum width of handle bars 550mm. 8 Brakes: Standard brake callipers one to be fitted to both the front/rear wheels. REAR AXLE NUTS MUST BE WIRED. 9 Handle bar ends must be plugged, & footrests rounded. 10 Attention: It is not our intention to stop the pupils from innovating or to dampen their enthusiasm. Far from it we will actively encourage that sort of approach. We wish that pupils who spend money and modify their machines do so in a spirit of honesty and fair play. To this End they should enter the modified water-cooled class. The organizing committee will reserve the right to request that the first 3 Placed bikes in any standard class be dismantled and inspected at the conclusion of racing and before prizes are presented. If any Modifications occur, the student will be disqualified, all points will be forfeited, and they will be excluded from participating in the Following year s event. The committee s decision will be final. A water-cooled gasket set will be provided so the student can reassemble the bike at no cost to the student. 9 Copyright 2019 N.Z.N.S.S.M.B.R.C.INC.