No jetting changes why?
Hey i don't know that is why i am asking but if you don't have to rejet you really aren't creating much more air flow as the product says it does? I have FMF fatty pipe and powercore2 silencer on my yz250. i am going to buy this product hopefully, powernow system, and an aftermarket air filter. will throttle response be greatly changed or am i just wasting money??
4 years ago