Even out the abrupt initial power delivery to eliminate throttle snap that's especially evident with modern EFI bikes
Introduce a non-linear ratio between hand throttle and the carb or throttle body opening
Throttle 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 increase after half-throttle to keep the full throttle position at or near stock
Includes a set of grips with a durable nylon tamer throttle tube for 1" handlebars installed in throttle-side grip