7 years 50cc Production 50cc Automatics For the first year of racing, riders may only race 50cc Automatic Quads built by the manufacturers.  There will be no modifications allowed to the engine, exhausts etc.  Engines must not have exceeded 50cc at time of manufacture.
7-9 years 50cc Modified 50cc Automatics Modifications are allowed to the engine up to a maximum of 50cc.  Frame and engine must be by the original manufacturer.  Engines must not have exceeded 50cc at time of manufacture.
8-13 years 100cc Standard

Max 100cc 2stroke Auto

Max 150cc 4 Stroke Auto Aircooled

Standard Quads.  No modifications allowed to engine or exhausts etc.  Frame and engine must be by the original manufacturer.  Only A Arm rear arm axles may be modified.  Engines must not have exceeded 100cc 2 stroke or 150cc 4 stroke at time of manufacture.
9-13 years 100cc Race Production & Modified

Max 100cc 2stroke Auto

 

Max 150cc 4 Stroke Auto Aircooled

Automatic machines.  Modifications allowed to the engine, A Arm and Suspension.  Frame and engine must be by the original manufacturer.  Only A Arm rear arm axles may be modified.  Engines must not have exceeded 100cc 2 stroke or 150cc 4 stroke at time of manufacture.
9-14 years 100cc Geared

Max 100cc 2stroke Auto

 

Max 150cc 4 Stroke Auto Aircooled

Modifications allowed to the engine, A Arm and Suspension.  Engines must not have exceeded 100cc 2 stroke or 150cc 4 stroke at time of manufacture.
11-16 years 250cc Standard

200cc 2 Stroke

250cc aircooled 4 stroke

No modifications are allowed to enhance the engine performance.  Engines must not have exceeded 200cc 2 stroke or 250cc 4 stroke at time of manufacture.
11-16 years 250cc Race & Production & Modified

200cc 2 Stroke

 

250cc aircooled 4 stroke

Modifications allowed to the engine, exhaust, suspension etc.  Frame and engine must be by the original manufacturer.  Engines must not have exceeded 200cc 2 stroke or 250cc 4 stroke at time of manufacture.
14-17 years 250cc Open 250cc 4 stroke Modifications are allowed to the engine, exhaust, suspension etc.