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Dirt Bike Brands - Other
Tuning Info Req.
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[QUOTE="John In NC, post: 982198, member: 63754"] I am the 2nd owner of a '99 YZ 250. It has a FMF Gnarly pipe. My problem is that it is not running right from idle to about 1/3 throttle. It also has a tendency to foul the plug. It came with a NGK B7ES, the book says to use a BR8EG. So I think the PO installed a hotter plug to compensate. I keep the air filter clean so that that can be ruled out. The stock jet sizes are MJ 172, PJ 50, power J 80, Starter J 85. I don't know what is in it right now. The info I'm looking for is what would be a good starting point: stock? As that I live about a week from any parts I my require, is there a kit available with an assortment of jets? Or am I stuck ordering one jet at a time. I plan on installing a 12oz fly-wheel weight and would like to do both projects at the same time. Lastly, any recomendations on a place to purchase the items? [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
Tuning Info Req.
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