On my 08 I have to rotate the throttle forward to turn on or off . You have to have the engine off and the ignition on , rotate the throttle forward until the cruise control indicator light in the tach flashes green around 5 times , do the same to turn it off except the cruise light will flash red . You may not need to let the light flash 5 times but thats what I do and everything works out OK . You will not hear the difference until the bike is get real hot like sitting @ stop lights for along time in the summer , the bike will be running on the front cylinder only and it will sound like it . If you are sitting @ a stop light and you know when it is going to change rev up the bike a little and the rear cylinder will fire up , it helps you take off if the bike is running on 2 cylinders otherwise it will be a little sluggish until the rear cylinder fires .