Larry Cook's specially-designed jet kit for UM V2S-650 and Hyosung GT650 motorcycles.

Includes Larry's step-by-step instructions, complete with with pictures. Comes with main jets, pilot jets, carb slide modification for better throttle response, tools for opening carb body, instructions for modifying the air box for improved air flow..

Leave other GT650 riders wonder why you're so much faster than them!

Note: This unit is not designed for use with the stock GT650 exhaust system.