Big Twins
Big Twins
Motorcycle specifications
1. Originally equipped air-cooled pushrod V-Twin engines, maximum displacement of
131ci. normally aspirated.
2. S&S, Jim’s or similar air-cooled pushrod Twin Cam engines w/MSO are acceptable
up to 131ci. normally aspirated.
3. Forced induction air-cooled pushrod V-Twin engines allowed with maximum
displacement of 107ci.
- All Years Harley-Davidson Non Touring Air Cooled Models
- All Years Indian Non Touring Air Cooled Models
1. Originally equipped air-cooled pushrod V-Twin engines, maximum displacement of
131ci. normally aspirated.
2. S&S, Jim’s or similar air-cooled pushrod Twin Cam engines w/MSO are acceptable
up to 131ci. normally aspirated.
3. Forced induction air-cooled pushrod V-Twin engines allowed with maximum
displacement of 107ci.
Indian Motorcycles:
1. Originally equipped air-cooled pushrod V-Twin Engine, maximum displacement of
131ci. normally aspirated.
2. Forced induction air-cooled pushrod V-Twin engines allowed with maximum
displacement of 111ci.
In order to equalize the performance of motorcycles used in the BRL, a system of performance enhancements or restrictions has been developed (such as minimum weight, air restrictor or REV limit may be applied according to their respective racing.
Please see BRL race class and eligibility overview here for a complete list of rules and specifications for each class.
*EVERYTHING THAT IS NOT AUTHORIZED AND PRESCRIBED IN THE BRL RACE CLASS AND ELIGIBILITY RULE BOOK IS STRICTLY FORBIDDEN
Please see BRL race class and eligibility overview here for a complete list of rules and specifications for each class.
*EVERYTHING THAT IS NOT AUTHORIZED AND PRESCRIBED IN THE BRL RACE CLASS AND ELIGIBILITY RULE BOOK IS STRICTLY FORBIDDEN