Circuits & Classes

Classes

Spec Supersport

Max 50cc 2 stroke or 100cc 4 stroke. Sport frame.

Formula Supersport

Max 64cc 2 stroke or 125cc 4 stroke. Sport frame.

Thunder

Max 125cc 4 stroke. MX frame.

Formula Thunder

Max 65cc 2 stroke or 125cc 4 stroke. MX frame.

Formula GP

Max 93cc 2 stroke or 150cc 4 stroke. Sport frame.

Motard

Max 105 cc 2 stroke or 150cc 4 stroke. MX frame.

Youth

Max 50cc 2 stroke or 70cc 4 stroke.

Official rules and regulations can be viewed at the national regulation site: https://www.motorcyclingcanada.ca/wp-content/uploads/2019/02/PDF-2019-CMA-Rule-Book-Dirt-Track-English.pdf

Spec Supersport

Factory built machine using a sport bike style frame. Maximum 50cc single cylinder liquid cooled 2 stroke or maximum 100cc single cylinder air cooled 2 stroke or maximum 125cc single cylinder air cooled 4 stroke. Few OEM medications are permitted.

Formula Supersport

Factory built machine using a sport bike style frame. Maximum 64cc single cylinder liquid cooled 2 stroke, maximum 80cc single cylinder air cooled 2 stroke, maximum 125cc liquid cooled 4 stroke or maximum 200 cc single cylinder air cooled 4 stroke engines. Outside of engine displacement, many modifications are permitted.

Spec Thunder

Factory built machine using an off road style frame. Maximum 125cc single cylinder 4 stroke air cooled engines. Few OEM modifications are permitted.

Formula Thunder

Factory built machine using an off road style frame. Maximum 65cc single cylinder 2 stroke liquid cooled, maximum 80cc single cylinder air cooled 2 stroke, maximum 125cc single cylinder liquid cooled 4 stroke, maximum 200cc single cylinder air cooled 4 stroke engines. Outside of engine displacement, many modifications are permitted.

Motard

Factory built machine using an off road style frame. Maximum 105cc 2 stroke or 150cc liquid cooled 4 stroke. Outside of engine displacement, many modifications are permitted.

Formula GP

Factory built machine using a sport bike style frame. Maximum 105cc single cylinder liquid cooled 2 stroke, 150cc single cylinder liquid cooled 4 stroke, 200cc single cylinder air cooled 4 stroke. Minimum 64cc single cylinder liquid cooled 2 stroke. Outside of engine displacement, many modifications are permitted.

Youth

Machines are limited to a maximum of 50cc air cooled 2 stroke and maximum 70cc air cooled 4 stroke engines.

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