Just wait until you get it jetted right, you will have gains instead of losses.

 

I have the yoshi 450 kit and so far i noticed that stock gearing works pretty damn good. I went up a tooth in the front and i lost alot of acceleration, so i went back to stock and it is fast. If do anything with the sprockets , go down a tooth in the back.

 

what do you mean it is fats? It accels fast or it goes faster top speed? Because with that much power you think it would act like its geared down. And it would accelarate really fast.