3 different cuts showing idling and reving the motor un-jetted then jetted. 1st - 160 main with spark arrestor installed 2nd - 160 main without spark arrestor 3rd - 170 main and last ring on needle jet without spark arrestor
@NOREMAC770 you need to re-jet when you do any modification to the airflow, whether its intake or exhaust, especially if you port/polish or change the cams. some guys will re-jet for the temperature and elevation. when im in the mountains, i run rich, but if i go to the beach it runs lean. elevation plays a huge role. also if your are running in the winter, the air is cooler and more dense, so you need to richen it so it doesn't run lean. not a huge deal though. i leave mine alone
i have a kfx400 with k&n cone, powerlid fmf powercore 4 slip on without spark arrestor and the jets are too high so i should try the same setting as you
i agree with 1976tdm , clean your carb first. you normally wouldn't think to have to say that, but then again, there are people who don't know to do it.
@kbrawlz when you installed just the exhaust did it need to be re jetted and when you had just the exhaust and filter (stock air filter lid) did it have to be re jetted
Just bought it today. Are they good? Im running with a 130 main jet and having that same pop sputtering issue. How high on the jet number should i go? Check my video please my atv sound please.