Improving upon the original Big Shot. the Big Shot II gives the user to add or subtract fuel from the Fuel Injection system. Using the same load based technology as the original Big Shot, the Big Shot II always knows how much fuel your bike needs whether you are going uphill, downhill, cruising or even towing a trailer. Even temperature and elevation do not affect the Big Shot II. Essentially the only time adjustment is needed is when you modify your engine. The Big Shot II is a plug and play system and does not require the use of a computer or dynamometer to get your bike running great.