I have an 05 Raptor 350 and i want more power. I was wondering if a JE 12:1 piston kit would be a good way to get power, or if i should get something else.

 

it depends on how much money you want to stick in the 350.

high comp piston, port and polish the head as well as a cam will wake it up. Especially if you already have a exhaust and filter on it.

But if you want to make it a true speed demon you will be better off saving your $$ selling the 350 and buying a 660 or 700