ok, i have a yamaha warrior that can breathe ( uni filter, megamax 2)but i still want more power, the conditions are too dusty/muddy/snowy when i ride to go with no lid or even to put holes in it.

i was wondering what i should do,

get a cam kit ??
get a piston kit (slight overbore+ high comp)???

get above in one kit (powroll 365 kit)???

or any other suggestions you have except sell and buy a new atv. but remember i am VERY CHEAP

also how much power would a 40 over bore give me at 10:1 compression with stock cam etc

thanks in advance

 

go to albaaction.com and take a look at the high kit the has high comp. pitson cams valve springs and valves for $425 or a 500cc bibg bore at fourstroketech.com

 

Sorry,but FST discontinued the 500 kit,not enough interest in it. They have a .040 over kit with a cam for 295 (core on the old cam,too) Alba has a 400 stroker kit,but you have to split the motor,and it costs 1200. The 365 kit will give you a nice return in power,but just a little overbore and a 10.25 piston will wake it up real nice. One thing to add would be an oil cooler, bigger,higher comp. means more heat,and heat robs hp.