If you already have a 120cc kit or bigger then you might want to try a Kitaco 26mm carb. I'm thinking maybe for the trailbikes 132cc kit, but it was night and day difference on my 145cc powroll stroker. Much better throttle response, power, and best of all it mad rev much better. It's pretty expensive at about $260, but if you're looking for that power it might be worth a shot. Yes I sound like a salesman, but I'm not making any money off it and I kind of hate Kitaco stuff, but I like this carb. It really works better than the Keihen.