Evens out the abrupt initial power delivery to eliminate throttle snap that's especially evident with modern EFI bikesIntroduces a non-linear ratio between hand throttle and the carb or throttle body openingThrottle cam's radius is reduced initially, which requires the rider to rotate the throttle slightly further to get the same opening position as stock; the radius increases after half-throttle to keep the full throttle position at or near stockIncludes a set of grips with a durable nylon tamer throttle tube for 25.4mm (1") handlebars installed in throttle-side gripThrottle tube is also available separately