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Yamaha MX & Off-Road Dirt Bikes
YZ250 Jetting Problems
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[QUOTE="CApilot, post: 843876, member: 56861"] I have two 2004 YZ250's, one is stock, except for FMF Turbin Core 2 silencer, jetting is right out of the book, pilot jet 50, needle second notch, main 178. Runs strong, still possibly a little rich. The other bike has the same silencer, and also has the FMF Fatty pipe. This bike is apparently running really rich, lots of spooge and wet plugs, and I have noticed smoke coming from the powevalve vent line. I have the pilot jet down to 45, and still seems rich. Is this normal for these bikes jetting to be so different, and should I continue to try to go smaller on the pilot. Or is there something else wrong. [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
YZ250 Jetting Problems
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