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Streetstock regulations

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Engine capacity

Maximum 125cc/Minimum 115cc OE engine
The use of superchargers or turbochargers is prohibited

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Engine type

Only four stroke OE homologated road engines.
No competition engines

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Chassis

Seat subframe may be modified/changed. 

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Fuel mapping

Fuel mapping plug in boxes eg. power commanders/resistors/ignition boxes  can be fitted including after market ECU/CDI
Exhaust front pipe maybe modified or replaced
The only permitted  end can for 4 stroke engines will be the factory Original Equipment or an “unmodded/undamaged” powertech 

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Fuel injection

Standard ECU can be replaced. Standard airboxes must remain original and only the external rubber boot may be removed. Maximum hole size to be no more than 4225mm².

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Tuning

Some engine tuning is permitted on Yamaha, Honda, KTM, Aprilia, Kawasaki and other brands approved by the championship.  These manufacturers can run high compression pistons and race cams. In addition, the Honda two valve engines are allowed increased valve sizes. Suzuki engines must remain OE standard with no modifications at all.
Starter motors if originally fitted must remain and be functional.
Cutting of the ignition/fueling for the purpose of changing gears is allowed by a quickshifter mechanism.

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Bodywork

Any aftermarket fibreglass bodywork is permitted
Standard road bodywork is permitted but must have mirrors/stands removed. Head lamp and rear light glasses must be adequately taped to prevent splintering. Unused wiring for lights and switches etc may be removed.
Replacement parts, only OE or pattern to OE spec parts can be used in engines

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Forks

The forks must remain standard OE, any internal modifications are allowed, external preload adjusters allowed.
ANY forks fitted to the same make/model of bike irrespective of year eg YZF-125 any year YZF-r125 forks/wheels, CBR125 any year forks/wheels “BUT” all parts must be originally fitted from the same Manufacturer 

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Suspension

Rear shocks can be modified/replaced with no restrictions as long as they fit the original mounting points

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Brakes

Pads, lines, master cylinders, discs, and footrest/hangers are allowed to be changed. Disc’s must remain the OEM diameter for the model of bike. Suzuki brake pads must be OEM (non-sintered) when the standard OEM disc is in use. 

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Chain & sprockets

Any chain and sprocket size can be used

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Wheels

Yamaha, Honda, KTM, Aprilia, Kawasaki and other brands approved by the championship are allowed to change the OEM wheels for any other 17" road bike homologated wheels (no after market or GP wheels allowed). For Suzuki, they must remain OEM fitment. Motorcycles with wheels size 16″, 17″, 18″ are permitted. Wheel spacers may be changed

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Tyres

Any tyres permitted, tyre warmers are also allowed.

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General

The only liquid engine coolant permitted is water
Oil sump plug and filler plug must be lock wired
A red rain light fitted to the rear of the Motorcycle

Anything not mentioned in the above rules has to be agreed by the committee.

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2024 Streetstock Champions

Money Motorsport

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