Only Moto 400 members will score points in the Moto 400 Championships.

Points will be scored as per FIM.



All items not mentioned in the following articles must remain as originally produced by the Manufacturer for the homologated machine. Anything that is not authorised and prescribed in these rules are strictly forbidden. All motorcycles must comply in every respect with all the requirements for racing as specified in the Technical Regulations, unless it is equipped as such on the homologated machine. Eligible Machines:

Any 2 cylinder two stroke, or 4 cylinder four stroke motorcycles originally produced for road use with a water cooled engine between 201-415cc, and any single or twin cylinder 4 Stroke machines with a maximum capacity of 450cc may be used provided it adheres to the following regulations.

Older models may be updated with genuine parts found on a newer version of the same model and newer models may use parts from older machines. All parts must be used as intended for the homologated machine and in accordance with the manufacturer’s recommendations.


1. Frame:

Frame must remain as originally produced by the manufacturer for the homologated machine. Nothing may be added or removed from the frame body with the exception of a steering damper bracket. Rear sub frame may be replaced or modified. Refinishing of frame to a suitable standard is acceptable.

2. Swingarm:

No restrictions

2. Suspension:

Forks may be replaced. Steering damper may be added although it cannot act as a steering lock device. Rear suspension unit ca n be changed or modified.

3. Wheels:

Wheels may be changed but must be 17”. Wheel bearings and spacers may be modified or changed where required. The speedometer drive may be removed and replaced with a spacer. The refinishing of wheel rims to a suitable standard is acceptable. 18” Rear wheel may be replaced with a suitable 17”. Modifications can be made in order to accept safety retention devices.

4. Brakes:

Front and rear brake discs may be changed. Only ferrous materials are allowed for brake discs. Front and rear brake callipers may be

changed. Front and rear master cylinders may be changed. Front and rear hydraulic brake lines may be changed. The split of the front brake lines for both front brake callipers must be made above the lower fork bridge (bottom yoke). Front and rear brake pads may be changed.


5. Tyres:

All tyres must be treaded. Slick tyres are not permitted.


6. Controls:

Footrest and foot controls may be replaced or relocated but brackets must be mounted to the frame at the original mounting points. Handlebars, hand controls and cables may be altered or replaced (this does not include brake master cylinders) from those fitted to the homologated motorcycle. Electric stop switch must be located on the handlebars and must be operational.

7. Fairing and Seat Unit:

Fairing, mudguards and seat unit may be altered or replaced. Windscreen, if fitted, may be replaced with transparent material only. The original instruments and fairing brackets may be removed or replaced. The petrol tank must remain as originally produced by the manufacturer for the homologated machine although it may be refinished if required. The position of the tank mounting points on the frame must remain as standard. The lower fairing has to be constructed to hold, in case of an engine breakdown, at least half of the total oil and engine coolant capacity used in the engine (minimum 5 litres). The lower edge of openings in the fairing must be positioned at least 50 mm above the bottom of the fairing. The lower fairing must incorporate a hole of 25 mm in the bottom of the front lower area. This hole must remain closed in dry conditions and must be only opened in wet race conditions as declared by the Race Director.

8. Wiring Harness and Battery:

The wiring harness may be altered or replaced. Additional wiring may be added where required, with the exception of the following: Electric stop switch must be fitted and working. The size and type of battery may be changed and or relocated.

9. Air Box / Carburetion / Fuel Injection:

The air box may be altered or replaced from that fitted to the homologated motorcycle. The air filter element may be removed or replaced with an aftermarket item. Carburettors must be the standard units as on the homologated model. Throttle bodies for fuel injected machines must be as on the homologated model. Carburettor jets and needles may be replaced. Resizing of the air metering holes in CV carburettors slide control is permitted. No other alterations are permitted to the air intake or carburetion system. Bell mouths may be added, altered or replaced from those fitted to the homologated motorcycle. The fuel injection management system may not be altered or replaced other than the remapping of internally stored fuelling maps.

10. Engine:

Must not exceed cc as stated above. Cylinder head, camshafts, cam sprockets, crankshaft, rods, pistons, valves, cylinders and all other engine components may be modified. Polishing and lightening of engine parts is permitted. Balancing or gas flow modifications normally associated with individual tuning is permitted. Compression ratio of the engine maybe changed. Camshaft timing may be changed. The crankcase/gearbox casing, clutch and generator covers may be protected by additional means, e.g. protective covers made of stainless steel or carbon/Kevlar composites. The thermostat may be removed from the housing to aid cooling, if required.

11. Transmission:

An addition to the gearbox or selector mechanism, such as quick shift systems is permitted. Clutch Springs, friction and drive plates may be replaced. The use of slipper clutches is permitted Gear shift detent spring may be replaced with a heavy duty item. Front and rear external

drive sprockets, chain pitch and chain length can be changed.

12. Ignition and Engine Control System:

Ignition and engine control system (CDI) may be modified or changed. All units must remain fully interchangeable with available control units. Modifications or alterations, whether electronic or mechanical, are permitted to the motorcycle to alter the engine ignition timing. The fitting of a curve changer is not permitted on 4 stroke machines.



13. Generator:



The generator, starting system, starter crank gear and starter shaft may be replaced, modified or removed from those fitted to the homologated motorcycle.

14. Exhaust System:

Exhaust pipe and silencers may be altered or replaced from those fitted to the homologated motorcycle. This must adhere to the maximum noise regulations of 105db as set out in the MCUI Standing Regulations. The number of final exit(s) to the exhaust may be altered from that of the homologated machine. Wrapping of exhaust systems is permitted.

15. Fasteners:

Standard fasteners may be replaced with fasteners of any material and design. The strength and design must be equal to or exceed the strength of the standard fastener it is replacing for structural applications. The use of titanium in the swing arm spindles and the wheels spindles is forbidden. For wheel spindles the use of light alloys is also forbidden. The use of titanium alloy nuts and bolts is allowed. Aluminium fasteners may only be used in non structural locations.

16. The Following Items MUST BE Removed:

Headlamp, rear lamp and turn signal indicators (when not incorporated in the fairing). Openings must be covered by suitable materials. Rear view mirrors, horn, license plate bracket, tool box, helmet hooks and luggage carrier hooks, passenger foot rests, passenger grab rails, safety bars, centre and side stands must be removed (fixed brackets must remain).

17. The following items MAY BE removed:

Instruments, instrument bracket and associated cables, horn, license plate brackets, tool kit, tachometer, speedometer and wheel spacers, radiator fan and wiring, passenger foot rests, passenger grab rails and upper chain guard.

18. The following items MUST BE adhered to:

Motorcycle must be equipped with a functional ignition kill switch mounted on the handlebar that is capable of stopping a running engine. Side stand must be removed. All drain plugs must be safety wired. External oil filter screws and bolts that enter the oil or water cavities must be safety wired. Head lamp, rear lamp and turn indicators must be removed. A suitable material must cover the openings. Mirrors must also be removed.

19. Replacement and Repairs:

Where necessary, parts from an older or newer version of the same model maybe used.

20. Chain Guards:

A guard must be fitted in such a way as to prevent trapping between the lower drive chain run and the final drive sprocket at the rear wheel.

21. Fuel:

All 4 Stroke machines, only Unleaded and Super Unleaded fuel is permitted. The use of fuel additives is strictly prohibited. Avgas, Race Fuel and fuel additives are permitted for 2 Stroke machines only in order to inhibit unnecessary detonation.

22. Radiator and Oil Cooler:

The original radiator or oil cooler may be modified to aid cooling. Radiator hoses may be replaced with those of a similar internal diameter. The use of coolants is prohibited, water only to be used.

23. Bore and Stroke:

Bore and Stroke details must be displayed on the motorcycle.

24. Race Numbers & Backgrounds:

Background: Blue Number: White

Size as per MCUI Regs




25. Rear Safety Light

All motorcycles must have a functioning red light mounted at the rear of the seat to be used during wet practice/races or in low visibility conditions as declared by the Clerk of the Course.

  1. The lighting direction must be parallel to the centre line of the motorcycle (running direction) and it must be clearly visible from the rear, at least 15 degrees to both the left and right sides of the centre line of the motorcycle.

  2. It must be safely mounted on the very end of seat/rear bodywork and approximately on the centre line of the motorcycle.

  3. The power output/luminosity must be equivalent to approximately 10-15W (incandescent) or 3-5W (led).

  4. The light must be able to be switched on and off.

26. Handlebar Lever Protection:

All motorcycles must be equipped with a brake lever protection, intended to prevent the handlebar brake lever from being accidently activated in the case of collision with another motorcycle.

27. Engine Protection.

All lateral covers/engine cases containing oil on, 4 stroke machines, and which could come in contact with the ground during a crash, must be protected by a second cover made from composite materials, aluminum or steel plates and/or bars are also permitted.

All these devices must be designed to be resistant against sudden shocks and must be fixed properly and securely. Where secondary covers are not commercially available, Engine case guards in the form of strengthened engine side covers maybe installed. The countershaft cover may be removed. The addition of a crankcase protector at the countershaft