russellsroost31
01-26-2014, 04:18 PM
hey guys i got an 04 yfz 450 it has 12:1 wiseco piston stock crank port polish stage 3 hotcams full hmf
i have a 185 main in it right now pipe glows after a bit of rev at idle back fire
it also back fired with a 190 but the exhaust smelled rich even smoked black
also with a 188 and the a/f screw adjusted the backfire stoped at 3/4 throttle but if i take it past 3/4 and let off fast she will back fire
the motor runs good no problems with it just need help jetting
i have a 185 main in it right now pipe glows after a bit of rev at idle back fire
it also back fired with a 190 but the exhaust smelled rich even smoked black
also with a 188 and the a/f screw adjusted the backfire stoped at 3/4 throttle but if i take it past 3/4 and let off fast she will back fire
the motor runs good no problems with it just need help jetting