Request for Rule Clarification for F500 Motorcycle Engine
#27073 from James Weida · No action required · Minutes (2019-08 Fastrack)
Thank you for your letter. Sleeving a throttle body to assist air flow through a flat plate intake restrictor
is not permitted. F500 is a restricted class, and any allowable modifications, changes, or additions are
stated in the rules. The rules applicable to 600cc motorcycle engines state that "Fuel injection, if used,
must be stock and unmodified for the model and year of the engine that is used."