I just wanted to know if you guys think a "JE Piston 12:1 standard bore" would do any good and what could i expect from it, since I might buy it for my Raptor

 

JE makes good pistons. It would definately give you more power. Not quite sure about the ratio. Dont go too high on the compression if you dont want to run racing fuel. You could expect noticeable torque increases. If youre just looking for more power and dont need a rebuild, you can get more power with a cam and head work than you can with just a piston.

 

well i am trying to get more power out of it so what would be the cheapest way to get more power out of it?(Already has jets, pipe, and racing clutches)

 

Im not a pro on 660 engines, but a cam would probably be the best bang for your buck. Then a piston would be next and if you want even ore power, you could get (while not too cheap) a port & polish job and larger valves.