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Dirt Bike Brands - Other
2003 yz 250 "detonation"
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[QUOTE="SpectraSVT, post: 859674, member: 30250"] Your running lean. Mine does this with the PC platinum and FMF Fatty. Also, some YZ's require race gas when it starts detonating. For some reason aftermarket pipes cause the YZ to ping alot. But if the jetting is close it shouldn't ping hardly at all. Try richer main to start. Mine usually acts up around midrange than stops when I'm WOT. I need to go up one on the main for starters. Haven't ridden in a couple weeks so haven't had a chance to fix it. Also, my YZ will instantly tell you if the pilot is correct or not. Too lean and it revs high from the get go. Too fat and it won't idle unless the air screw is all the way in. So after you get the detonating under control with the main/needle, go after the pilot if required. [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
2003 yz 250 "detonation"
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