KARTSPORT NEW ZEALAND MANUAL SECTION N SPECIFICATIONS RULE N14 ROTAX FR125 JUNIOR MAX

Transcription

1 KARTSPORT NEW ZEALAND MANUAL SECTION N SPECIFICATIONS RULE N14 ROTAX FR125 JUNIOR MAX N14 Rotax FR125 Junior Max Issue published and effective N14.1 Engine Technical Specifications are under the control of KartSport New Zealand Executive in conjunction with Rotax. The KartSport New Zealand Executive reserves the right to alter the class specifications to ensure fairness of competition, safety and the wishes of the competitors. Only written submissions will be accepted for changes, with the Executive acting on them if considered necessary. VARIANT OPTIONS: Pre EVO Rotax FR125 Junior Max with option of Series 1, 2 or 3 (new) exhaust system. OR Pre EVO Rotax FR125 Junior Max with full EVO Kit except for: new Series 3 exhaust system, new crankshaft, new con rods and new piston which are all optional. OR Complete new Rotax FR125 Junior Max EVO engine with new Series 3 exhaust only. NOTE: No Mixing and Matching The mixing of pre EVO and EVO components is limited to: A new EVO engine must be run with ALL components supplied including the new Series 3 exhaust system. A pre EVO engine with an EVO Kit upgrade must run with ALL EVO Kit components except the new Series 3 exhaust system, new con rod, new crankshaft and new piston which are all optional. A pre EVO engine (circa Dec 2014 specifications) without the EVO Kit must run with ALL pre EVO components with the following exceptions: new Series 3 exhaust system, new crankshaft, new con rod and new piston are optional. N14.2 The engine is a single cylinder, liquid cooled, reed valve 2 stroke. UNLESS IT STATES THAT YOU CAN DO IT, YOU CANNOT. Unless otherwise specified filing, grinding, polishing, surface treating, machining or lightening of any component is expressly forbidden. All measurements given in these engine rules are for technical references only; you must not machine any parts to the dimensions given. The addition of material to any component is not allowed. Only genuine Rotax components that are specifically designed and supplied for the FR125 Max engine may be used in or on the engine and its ancillaries, unless otherwise specified. The use of either red or green OEM gaskets is permitted. The engine is to be used with intake silencer, carburettor, fuel pump, radiator, wiring loom, ignition system, clutch, gears and exhaust system as supplied by the manufacturer. Unless otherwise specified position and method of mounting the battery, wiring loom, exhaust system and fuel pump are free provided they are securely fixed and comply with Kartsport New Zealand Sprint chassis (Rule K1). The ignition coil must be mounted in the original position as supplied by Rotax. The use of thermal barrier coatings/ceramic coatings on or in the engine or exhaust system is not allowed. 1

2 Fitting of helicoil type thread repair inserts to repair damaged threads is allowed, providing such repairs are not used to derive any benefit other than rectification of damage. The use of silicon type sealant between the ball and socket joint of the exhaust is permitted. The use of ceramic / ceramic hybrid bearings or bearings containing any ceramic component, are not permitted. The use of anti-friction coatings in or on the engine/engine components is prohibited. Welding of the external water jacket only is allowed to repair cracks. The welding may only be carried out on the external surface of the water jacket. Only localized spot facing the external water jacket/cylinder head cover mating surface is permitted to restore the cylinder sealing surface as required where the weld intrudes. The fitting of couplings (to enable pre heating or pre cooling the coolant) to the cooling system hoses, radiator or engine is not permitted. Information in Rotax Technical Bulletins may be used to confirm compliance or otherwise. N14.3 EXHAUST SYSTEM: Must be as supplied by Rotax and cannot be modified except for the replacement of the silencer absorption material and the use of threaded fasteners in place of the rivets for securing the silencer end cap. The exhaust system may be welded for repair purposes. The weld must not exceed more than half the exhaust s circumference at the point of the weld. It is permitted to paint the exhaust system with black paint. The use of any other coating or plating is not permitted.replacement items must be OEM Rotax parts. Exhaust Headers: Standard exhaust headers(s) must be used. Two versions of original exhaust headers are legal to be used. Version 1, without gasket ring (left illustration) Version 2 (EVO) with gasket ring (middle and right illustrations) For version 2 the measurement (C) must be at least 15.5 mm. The use of maximum 4 pieces of original Rotax exhaust springs, to fix the exhaust system to the cylinder is allowed. (a safety wire in the exhaust flange area is not allowed). Permitted modifications on the original exhaust systems are: Replacing the original rivets of the silencer end cap by 4 mm metric screws and corresponding locking nuts. Replacing the isolating mat (just one original isolating mat may be fitted) inside the silencer and the silencer end cap with perforated tube by original Rotax spares parts. Welding a socket (in a distance of mm from the ball joint) on the top of the exhaust system for measuring the exhaust gas temperature (EGT). Additional to the standard isolation mat a steel isolation mat (Rotax part no ) of the square dimension of mm is legal (not mandatory) to be assembled underneath the standard isolation mat according to the illustration. Clamp (1) must be fitted at a distance of 18+/-2mm, measured from the end of the tube. Clamp (2) must be fitted at the end area of the steel isolation mat. The measurement mm from the end of the perforated tube to the beginning of the steel isolating mat is a specification for assembly purpose only! Both clamps (1 and 2) are mandatory to be fitted and tightened. 2

3 Exhaust pipe with after muffler as shown in illustrations. There are three versions of exhaust system: Version 1: tuned pipe and silencer are one piece. The silencer is welded to the 180 elbow and the tuned pipe (top illustration). Version 2: tuned pipe and silencer are one piece. The silencer is welded to the 180 elbow. Two springs fix the silencer to the tuned pipe (bottom illustration). Following measurements are valid for version 1 and 2: Silencer end cap, diameter of hole: 21,0 mm (maximum). Length of inlet cone: 592 mm +/-5 mm (measured on outside from beginning of exhaust pipe until beginning of cylindrical part). Length of cylindrical part of exhaust pipe: 125 mm +/-5 mm. Length of end cone: 225 mm, +/-5 mm. Version 1 and 2 can also use the perforated tube and silencer end cap with the 90 degree elbow. Outside diameter of 180 bent tube: 41mm +1,5 mm/ 1,0 mm (measured at beginning and end of bend). 3

4 Version 3 (EVO): tuned pipe with 180 elbow and silencer are two separate pieces. The silencer is fixed with 2 springs to the 180 elbow and two springs to the tuned pipe. Silencer end cap with 90 elbow is mandatory to be used for version 3. To fit a 3rd original spring (crosswise at the ball joint connection between 180 elbow and silencer) is an allowed option. The silencer has to be mounted in a position where the direction of the 90 elbow outlet (direction of the hot exhaust gasses) does not harm any component of the chassis. Dimensions to be checked are: Length of inlet cone: 590 mm +/-5 mm Length of cylindrical part of exhaust pipe: 130 mm +/-5 mm Length of end cone: 230 mm +/-5 mm 4

5 N14.4 INTAKE SILENCER: Intake silencer with integrated, washable air filter has to be used with all parts as shown at the illustration and has to be mounted on the support bracket with two screws (in dry and wet condition). An 8mm maximum drain hole is permitted. Intake silencer tube (pos 2) and carburettor socket (pos 6) are marked with the wording "ROTAX". Intake silencer case bottom is marked on the inside with the Rotax part no Intake silencer case, top is marked on the inside with the Rotax part no Air filter (pos 4) must be installed as shown in the illustration between the two holders (pos 3) and must cover the complete area of the intake silencer case bottom (pos1). Two versions of air filters (pos 4) are legal to be used (Rotax or ). Single layer air filter - 'fine' version only (black) and double layer air filter (green/black) marked TwinAir. At intake silencer cover (pos. 2, Rotax part no ), it is mandatory to fit the O-ring (pos. 6) on the intake silencer tube (pos. 5). In wet conditions it is not permitted to attach anything to the intake silencer to protect the air inlet from water spray. N14.5 CARBURETTOR: DELLORTO carburettor VHSB 34 cast in the housing of the carburettor. QD, QS or XS (EVO) stamped in the housing of the carburettor. The complete inlet bore in the casting of the carburettor must show cast surface. All jets must be correctly seated and securely fitted at any time (tightened)! Settings of the carburettor adjustment screws (idle and idle air) are free. The position of the jet needle is free. Genuine OEM Dellorto Main Jets must be used. The Main Jet size is free. The two carburettor vent fittings can be connected with the original air vent hose minimum length 155mm (Rotax part no ). The location of the hose opening has to be placed at the rear of the carburettor. Or the two carburettor vent fittings can be connected with hoses. They must be leak proof venting into an overflow container as per Rule K1.23. One of the above options must be used. N Needle Valve Assembly: stamped "150". Needle of needle valve marked with diamond symbol INC" only. N Start Jet: is stamped with the digits 60. 5

6 N Optional Carburettor Plug Screw: marked "ROTAX" (ROTAX ) is legal to be used. N N N N Specific specifications for Dellorto VHSB 34 QS and QD Slide: must show with size 40 in casting and the bottom end of the slide must show cast surface. Jet Needle: stamped with K98 only. Floats: Only floats marked 3.6 gr or "5.2 gr" are legal to be used. N Needle Jet: stamped with FN 266. Total length: /- 0.3 mm. Length of bottom section: /- 0.2 mm 6

7 Top bore diameter / mm (measured 2mm inside) 4 x 4 cross holes diameter: Plug gauge 0.90 mm NO GO any of the 16 cross holes N Idle Jet: Only Idle jet permitted is stamped 60. Plug gauge 0.65 mm NO GO the bore of the idle jet 60. N Idle Emulsion Tube: The only Idle Emulsion Tube permitted is stamped 60. Plug gauge 0.65 mm NO GO the bore

8 Plug gauge 0.65 mm NO GO any of the 4 cross bores N Carburettor Insert: must show stamping "8.5". Angular bore: Plug gauge 0.60mm NO GO Vertical bore: Plug gauge 0.90mm NO GO

9 N Atomizer: Remove atomizer from carburettor body by means of venturi tool set (ROTAX ); Atomizer, total length: / mm Atomizer, length of cylindrical part: / mm Atomizer, dimension of cutaway: / mm 9

10 Atomizer, diameter of cross bore: / mm N Carburettor Float Height: The height of the two arms of the float lever must be within the slot of the carburettor gauge (Rotax part no ) by their normal weight measured at carburettor housing without gasket in the reverse upright position. N N N N N N Specific specifications for Dellorto VHSB 34 XS (EVO) NOTE: All other items not noted are as per Dellorto VHSB 34 QS and QD specifications. Slide: must show with size 45 in casting. Jet Needle: stamped with K57 only. Floats: Only floats marked "4.0 gr" are legal to be used. deleted deleted 10

11 N Needle Jet: stamped with DP267. Total length: /- 0.5 mm. Length of bottom section: / mm Top bore diameter / mm 11

12 N Idle Jet: stamped with 60 Plug gauge 0.65mm may not enter the bore. N Idle Emulsion Tube: stamped with 45 Plug gauge 0.50mm may not enter the central bore. N Atomizer: Remove atomizer from carburettor body by means of a venturi tool set. Total length: / mm 12

13 Atomizer length of cylindrical part: / mm Atomizer dimension of cutaway: 5.8 +/- 0.3 mm Atomizer dimension of cross bore: 5.0 +/ mm N Carburettor Insert: Must show stamping

14 Angular bore of carburettor insert: Plug gauge 0.60mm may not enter the bore. Vertical bore of carburettor insert: Plug gauge 1.30mm may not enter into bore. N Carburettor Float Height: The height of the two arms of the float lever must be within the slot of the carburettor gauge (Rotax part no ) by their normal weight measured at carburettor housing without gasket in the reverse upright position. 14

15 N14.6 FUEL PUMP, PULSE LINE, FUEL LINES and FUEL FILTER: OEM MIKUNI diaphragm fuel pump and components as supplied by Rotax only. Only one fuel pump permitted. Fuel pump must be mounted on the bottom side of the support bracket for the intake silencer (see illustration. Only one in-line fuel filter is permitted and this must be positioned in the fuel line between the fuel tank and the fuel pump. All fuel lines must be continuous (one piece without restriction, spigots, junctions, taps and similar devices) apart from the fuel tank pick up, the fuel filter and the fuel pump. N14.7 INLET SYSTEM: Inlet manifold is marked with the name "ROTAX" and the identification code " ". Some factory flash removal may be present at the conjunction of the inside contour and the carburettor stop mounting face. This is a manual trimming operation consisting of a small corner break of less than 3 mm in width. No additional grinding or machining is permitted. The reed valve assy. is equipped with 2 petal stops and 2 reeds, each having 3 petals. The thickness of the reeds is 0.6 mm +/ mm. Genuine Rotax Max reeds only. N14.8 SPARK PLUG: DENSO Iridium IW24, IW 27, IW 29, IW 31, IW 34 or NGK Iridium BR8EIX, BR9EIX, BR10EIX or NGK GR9DI-8 only. Shank length shall be 20mm maximum. Original washer must be used. Spark plug cap must be black in colour and marked with "NGK TB05EMA" or red in colour and marked NGK. N14.9 IGNITION SYSTEM: Digital battery ignition, variable ignition timing, no adjustments possible. KartSport New Zealand may use various test methods/equipment to determine the conformity of the ignition systems. Minimum length of ignition wire (high tension wire) is 210 mm from outlet of cable at ignition coil to outlet of cable at spark plug connector ( = the visible length of wire ). 15

16 N Exchange: Following a decision of the Stewards the Technical Officer(s) may be authorized to require the exchange of the ignition coil (Denso ignition system) or electronic box (Dellorto ignition system) with a substitute item owned by KartSport New Zealand. The substitute item must be the same make and model as the item previously fitted to the competitor s engine and must be returned to KartSport New Zealand when requested by the Stewards. Should an earlier return time not be nominated by the Stewards, the item must be returned to their original owners no later than the end of Technical Inspection for the event. N Ignition Pick Up: The marking of the pick-up must show the following numbers in the first line A steel ball (diameter 3-5 mm) placed on circular surface of the sensor must stay in the center of the circular surface. In addition to the original rubber sealing ring, the fitting of a maximum of two gaskets (Rotax , thickness 0,8 mm) between the pick-up and the crankcase is an allowed option. N Denso Ignition System: The casting of the ignition coil has to show the following in casting and DENSO. Ignition coil must show 3 pins at the terminal. Connector housing of ignition coil must have either black or green color Version with extension wire (number engraved as in picture) is not legal to be used). Minimum length of the high tension cable is 210 mm (from outlet of ignition coil to outlet of spark plug connector = visible length of cable). The ignition coil has to be fixed by means of 2 original silent blocks to the gearbox cover. In case the frame collides with the ignition coil, it is an allowed modification to use a supplementary extension bracket (rigid, solid metal, mounted at the original fixation holes of the gearbox cover) to avoid any collide. To fit a second original mass cable (ROTAX part no ) is an allowed option. 16

17 N Dellorto Ignition System (EVO): Removing black coating of the gearbox cover in specific areas defined by Rotax (for mass connection between cable harness and engine) is a legal modification. Ignition coil with separate electronic box ECU: Only units marked or are permitted. Ignition coil and electronic box have to be fitted by means of the corresponding brackets and components according to either of the illustrations below. Only the EVO2 loom, brackets and components are permitted from EVO The ground cable of the cable harness has to be connected to the lower rubber buffer of the support plates or via the starter motor for a 2017 harness. The visual appearance of the ignition coil must be identical with the pictures. Ignition coil must show 2 pins at the terminal. The ignition coil is labeled with two stickers, BRP and NIG The ignition coil is still legal to be used also if one or both stickers disappeared.. The FR125 Junior Max electronic box is labelled with sticker or , 125 Junior MAX evo and is still legal if the sticker has disappeared. Full EVO loom including start/stop buttons must be used. 17

18 N14.10 BATTERY: As per Rule K1.37 or the genuine Rotax battery clamp part number or EVO battery mount. Only one 12v battery is permitted. Battery must be mounted on the left side of the chassis. N14.11 STROKE: 54.5 mm +/-0.1 mm. N14.12 SQUISH GAP: 1.20 mm minimum. Measure as per procedure Rule M12. N14.13 COMBUSTION CHAMBER INSERT: Cast identification code has to be " " or " " or " " or /1" or /2. Casted wording "ROTAX" and/or "MADE IN AUSTRIA" must be shown. No welding nor machining of this part is allowed. Combustion chamber insert must conform to KartSport New Zealand Tech gauge. The crack of light between the template and the profile of the combustion chamber insert has to be the same over the whole profile. Carbon deposits can be removed before using the gauge. Heights of combustion chamber insert have to be mm with a tolerance of +0.0/-0.1 mm (A) and mm with a tolerance of +/- 0.2 mm (B). A B Uncoated as well as red coated (EVO) cylinder head is legal to be used. N14.14 PISTON and RING: Original, coated, aluminium, cast piston with one piston ring. The piston has to show on the inside the cast wording "ELKO" and "MADE IN AUSTRIA". Machined areas are: Top end of piston, outside diameter, groove for the piston ring, bore for the piston pin, inside diameter at bottom end of piston and some pre-existing factory removal of flashing at the cut out of the piston skirt. All other surfaces are not machined and have cast surface. 18

19 Original, magnetic, rectangular piston ring. Ring height : / mm Piston ring is marked either with "ROTAX ", "ROTAX " or ROTAX The piston ring is legal also if just parts of the marking are still visible. "Window" type piston as delivered in the early days of production is no longer legal to be used. Any mechanical treatment or rework of the piston is forbidden, Cleaning without changing the original surface is allowed (e.g. removal of carbon deposits). N14.15 GUDGEON PIN: is made out of magnetic steel. Dimensions must be according to the drawing. The minimum weight of the gudgeon pin must not be lower than grams. N14.16 CYLINDER: Light-alloy-cylinder with GILNISIL-plating. Any re-plating of cylinder is not allowed. Cylinder with one main exhaust port and exhaust valve. Maximum bore of cylinder = mm (measured 10 mm above the exhaust port). Cylinder has to be marked with the "ROTAX" logo. Cylinder with pneumatic timed exhaust valve. Cylinders marked with lettered or numbered casting codes and identification codes , or are legal to be used for all competition 19

20 Cylinders marked and showing the cast letter mark J in the inlet port show a fully CNC machined exhaust port and a fully CNC machined top edge of the central boost port. These cylinders must also display the KSNZ/Rotax stamp (see pictures below) at all events from and at other earlier events as specified in event/series Supplementary Rules. The horizontal and vertical dimensions of the exhaust port (cylinder with fully CNC machined exhaust port only) have to be checked with the template (Rotax part no ). The template has to be moved in horizontal and vertical position as far as possible into the exhaust port. In both directions the template may not touch the exhaust socket flange. N : Height of Cylinder has to be mm -0.05/+0.1 mm (measured with a digital vernier min. length 200mm). 20

21 N : Cylinder Surfaces: All transfer ports and passages have cast finish surface except some removal (done by the manufacturer) of cast burr at the inlet passage, exhaust port and passages. All ports have chamfered edges to prevent ring snagging. Any additional machining is not permitted. The top edge of exhaust port may show some pre-existing machining from the manufacturer. The sealing flange for the exhaust socket may show signs of machining from the manufacturer. All ports have chamfered edges. Any additional machining is not permitted. Cylinders marked , and the upper edge of the central boost port may show factory machining. The flange for the exhaust socket may show either cast finish or machined surface. Machined surface can be either flat or show a circular sealing bump. The top edge of the exhaust port may show either just a cast finish surface (left picture) or signs of a CNC machining (central picture) or signs of CNC machining in combination with signs of manual grinding (right picture). The exhaust port may show partial manual grinding done by the manufacturer to eliminate minor casting defects and to eliminate the NIKASIL burr at the end of the NIKASIL plating. N14.17 EXHAUST PORT TIMING: The "exhaust port timing" (distance from the top of the cylinder to the top of the exhaust port) has to be checked by means of the template (ROTAX ). Insert the template into the cylinder ensuring that the template is touching the cylinder wall and that the finger of the template is located in the middle of the exhaust port (highest point). Move the template upwards, until the finger is touching the top edge of the exhaust port. Insert a feeler gauge between the top of the cylinder and the template. It must not be possible to fit the feeler gauge specified FR125 Junior MAX: Cylinders and mm Cylinder showing Part Number (with fully CNC machined exhaust port only), has to be checked by means of the template (ROTAX ). Insert the template (take care to use the correct JUNIOR gauge) into the cylinder and move the template (at the highest point of the exhaust port) as far as possible into the exhaust port. In this position the template must not touch the cylinder wall. 21

22 N14.18 CON ROD and CRANKSHAFT: Con rod has to show forged numbers "213", "365", "367" or 362 (EVO) on shaft. Grinding or polishing of shaft of con rod is not permitted. Shafts of con rods "213", "365" and "367" are not machined and are copper plated. Shaft of con rod 362 (EVO) is not copper plated and is blank (grey/brown). The EVO2 con rod is permitted (see picture). Ignition signal on crankshaft: Fit the template (Rotax ) on the crankshaft. Align the hole in the template for the big end pin with the pin of the crankshaft. The two edges of the signal machining on the crankshaft must be in line (+/-0,5 mm) with the corresponding edges (MAX or DD2) of the template. 22

23 N14.19 CRANKCASE: As supplied by the manufacturer. Uncoated as well as black coated (EVO) crankcases are legal to be used. No grinding/polishing is permitted in the two main transfer passages as well as in the crank-area. Crankshaft main bearing 6206 from FAG only is allowed (must be marked with code BA or Z KL). N14.20 CYLINDER BASE GASKETS: genuine ROTAX gaskets only. N14.21 BALANCE DRIVE: Only steel balance gears are legal to be used. Balance gears must be installed and must be aligned according to the instruction in the repair manual. Mixing of steel balance gears of different width (6,0 and 9,0 mm) is strictly forbidden. N14.22 BALANCE SHAFT: Balance shaft and balance gears must be installed. Configurations of part no (equal with ), or legal. Surface (1) is not machined and must show cast surface. Measurement from centre of balance shaft to outer diameter of fly weight of balance shaft at defined length must not be lower than specified for (equal with ). The minimum weight of the dry balance shaft must not be lower than: 255 grams for balance shaft ROTAX part no (equal with ), or

24 N14.23 CLUTCH: Both clutch element versions (item 6 with or without holes) as in illustration are legal to be used. O-Ring (item 11 must be used). Old version clutch element (item 3) can be either untreated or nitrated configuration and must show the wording Rotax. New clutch drum (Rotax #659937) is permitted, both versions of the clutch drum (item 7) must show the wording Rotax. For 11 tooth sprocket, either the plain bearing (Rotax # , 15x17x20) or (15x17x17.6 Rotax # ) must be fitted without any O-ring or Sealed needle cage bearing (15x19x17, Rotax # ) must be fitted with O-ring (12x2.5, Rotax # ). Non Genuine Rotax Max 17 tooth Drive Sprockets are permitted for SuperKart competition only. Steel clutch and clutch drum of new clutch version must be within following specifications. Height of clutch: Minimum: mm Thickness of clutch shoe: Measurement has to be done at the 3 open ends of the clutch shoes, 5-10 mm from the machined groove (all clutch shoes must be completely closed at measurement - no gap). No measurement may be below 24,10 mm. 24

25 Outer diameter of clutch drum: Diameter has to be measured with a sliding caliper just beside the radius from the shoulder (not at the open end of the clutch drum). Minimum diameter: mm. Inner diameter of clutch drum: The inner diameter has to be measured with a sliding caliper. The measurement has to be done in the middle of the clutch drum (in the contact area of the clutch drum). Maximum diameter: mm. Height of sprocket with clutch drum assembly: Minimum height: mm. Signs of emission of grease from the needle/plain bearing into the clutch drum may not exceed that shown in the pictures below. The contact area between clutch and clutch drum has to be dry at all times no lubrication is allowed. 25

26 N14.24 CHAIN/CLUTCH GUARD: Must be fitted at all times. For Crankcase Rotax # (new style) the chain/clutch guard Rotax # must be used. For Crankcase Rotax # (original style) either the chain/clutch guard Rotax # or any other third party chain/clutch guard of a similar design/effectiveness must be used. N14.25 RADIATOR: The removal of the thermostat from the cylinder head cover is an allowed modification. Radiator must be mounted with all components as shown in the respective illustration. Any non original device to control the air flow through the radiator is prohibited. The radiator has to be mounted on the right side of the engine. Blanking of the radiator is allowed (Rule K1.38). The use of repaired radiators is permitted. The filing of the crankcase is permitted to allow the easy fitting of the water connection. Coolant: See Rule L6.3. Three different versions as shown in the illustrations are legal to be used. Version 1 Cooling area: Height = 290 mm, Width = 133 mm Thickness of radiator: 32 mm Version 2 Cooling area: Height = 290 mm, Width = 133 mm Thickness of radiator: 32 mm The support plate (pos. 7) enables two different mounting positions (height) of the radiator. Both mounting positions are legal to be used. \ 26

27 Version 3 Cooling area: Height = 290 mm, Width = 138 mm Thickness of radiator: 34 mm Radiator must be stamped on the side with the wording ROTAX. To remove the original flap is an allowed modification. N14.26 LEGAL ADDITIONS: Limited to motor mount, water temperature gauge, tachometer/hour meter, data logger. N14.27 NON TECH ITEMS: Non-original fasteners, circlips, washers, throttle cable housing, fuel and pulse line (type and size) as well as length of coolant hoses are allowed unless otherwise specified. The starter motor shall be installed as originally supplied and be operable, but may be repaired and its parts not subject to technical inspection. 27