ENGINE CAPACITY CLASSES:
The maximum engine capacity
permitted for machines used in the age groups set out in this Regulation
are as follows:
A Class 125cc Mono or 250cc
Twinshock, and Electric up to 10 bhp measured at the rear wheel
B Class 125cc Mono or 250cc
Twinshock, and Electric up to 10 bhp measured at the rear wheel
C Class Standard Wheel 80cc,
and Electric up to 7 bhp measured at the rear wheel
C Class Medium Wheel 80cc, and
Electric up to 7 bhp measured at the rear wheel
D Class Medium wheel 80cc, and
Electric up to 7 bhp measured at the rear wheel
D Class Small wheel 50cc Mono and 80ccTwinshock, and
Electric up to 2 bhp measured
at the rear wheel
E Class Small wheel Electric
powered machines up to 2 bhp measured at the rear wheel
Wheel sizes
Standard Wheel – 21" Front –
18" Rear
Medium Wheel – 19" Front – 17" Rear
Small Wheel – 16" Front – 14" Rear
The above is based on the
wheels of combustion engined machines using motorcycle tyres. If other
wheels are used as on current Electric powered machines then the outside
diameter (total circumference) of the tyre must not exceed that of the
corresponding tyre size.
Engine Sizes
Rebores are permitted subject
to the resulting engine capacity not exceeding a tolerance of +3cc
