The maximum allowed cubic capacity of the engine is 50cc 2-stroke 125cc 4-stroke engines
The final drive must be by chain.
Permitted wheel diameters are 16” 17” 18”
Wet / slick and intermediate tyres are permitted as are tyre warmers; Slick tyres are restricted by the ACU age and license restrictions.
Any race body can be fitted.
The bike must meet ACU road racing standing regulations in every other respect. / White numbers with Red backgrounds