Jetting with high comp piston

[trx4ever]

I live at about 3000 ft, I put a piston in and i did not notice a real difference, I have a 180 main and stock needle in the stock position. What do you guys suggest i put my jetting at..

my mods are sparks exhaust, 13.5-1 piston, rev box, cam, and k and n.



Thanks Kyle

[trx4ever]

anyone

[ricks450]

is your airbox lid removed. i never been able to tell a differance unless its a dramatic change. did you put all those mods on at one time, are did you put them on one at a time? i put a high compression piston in my bike and didnt fell a differance. i noticed it when i got beside the other guys that where stock are alittle moded. is your bike poping on decel? is it pulling through the rpms good? whats your spark plug look like? i would change your needle to a HRC or get a dynojet kit. ive got the dynojet kit. the taper is differant on the needle to change the amount of fuel that passes through, through the rpm range.