What kind of gains could I get out of a cam and piston combo compared to going big bore with same port work exhaust so on as so forth?

 

i went with fst's piston and cam. great increase. as far as the big bores go, i have not raced any or ridden any. i just wanted to save the whole "boring" thing til it needed it. but who knows i may not even have it by then. let your wallet decide when you get the info you want. how fast can you afford to be?

 

if you go with a high comp piston you are going to have to do cylinder work anyway, so you might as well go with a 102mm piston. piston/cam combo should give you better low end and stronger throughout power band depending on the cam. polish and port are "highly recommended", but a 5 valve port should be done by someone with experience to get the most out of it

 

RichieRoadRash How is your Raptor doin? About how much horsepower is the cam/piston combo giving you? Where did you order from? Website and price?

 

i got it from fourstroketech dot com. the piston was $300 and the cam was$300 with a $150 core. so it only will cost 150 after you send yours back. i never sent mine back. just in case. you'll also need stronger clutch springs and valve springs. in all it will cost around $800. cheap for the gains. because it will rip. and i've had no problems at all. i rarely get that lag in the starter while it's trying to turn the engine over. 93 octane works best. i tried vp green and it actually slowed me down a half second in 300ft. i mixed it a thousand different ways with simular results. it just burns too slow. i don't know of any cylinder work like vraptor was talking about, but i didn't do the work. i've ridden several stock raptors since this and can't believe the difference. i did not have to rejet after the work. the 150-155 was perfect. i had already moved up for the yoshi. you won't be disappointed. all i'm gonna do for this race season is a pro-design intake with a k&n and remove the lid and rejet.

 

What are your times and what are you running on dirt or sand?

 

damp dirt. my best time was 5.80. we use a tree and electronic timing. the season should be starting up soon.

 

Our group will prob. try to make it out there one day this season will keep you in touch and let you know when. If you can find the clases they run and the rules and post them.