In Landspeed motorcycle racing, the racer is trying to beat the fastest speed ever achieved by that style of motorcycle and type of engine for a timed mile. The pre eminent event for motorcycle LSR is the International Motorcycle Speed Trials by BUB, held on the Bonneville Salt Flats annually (near Labor Day). Motorcycles are classified based on body style, i.e. how much streamlining is incorporated. They are further classified based on engine size in cubic centimeters (cc s) and based on fuel type (gasoline versus any modified fuel).