The GT I bought saturday ran good but...............I wanted to check the throttle bodies very easy to do. I installed the carb tune set sinked the bodies perfect at about 4000 rpm and then knocked out the plugs and set the idle mixture with the air screws also perfect with the carb tune...this item cost me about $100 over a year ago. Been dying to use it on something. I also drilled two holes in each pipe.............second gear with the 14 tooth sprocket is very easy now no clutch. I read a few articles about guys tuning there throttle bodies..............Alot of what I read was BS. It is very easy. At least with the carb tune. Had to chew the boys ass though told him to take it down the road. And he is out doing 3rd gear 70 mph wheelie's...........I don't have the talent to do that. Matter infact I would say the bike can't even do it. But then the boy goes by doing it. Talent,being young and I guess stupid gets the job done. Glad my bike made it home in one piece.