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Yamaha MX & Off-Road Dirt Bikes
1999 YZ125 breaking down at high rev's
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[QUOTE="jds535, post: 1429132, member: 123830"] ok, here's my latest. The bike is running good at high RMP's now, even in higher gears. It rips on top like it should. It looks like it is running rich still though. I pulled the plug and confirmed this. It was wet and black. I also have black goo coming out of the powervalve overflow tube. I tried adjusting the airscrew but it didn't seem to have any effect at all. I noticed while on the stand that it bogs when you whack the throttle hard. If the rev's are high enough when you hit the throttle it will go right up, but if you start closer to idle and hit it, it will bog before it revs up. Everything points to pilot jet too rich right? [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
1999 YZ125 breaking down at high rev's
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