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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
2003 YZ250 jetting
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[QUOTE="stormer94, post: 668754, member: 23528"] Unrelated, but kind of, thought a few you might relate. I had a plug fouling problem with my last Yamaha sled. I'd foul a pair of plugs every 30 miles, no kidding. By the time I got the sled to 600 miles I had a coffee can full of fouled plugs, nearly 40 of them. Nothing we tried worked, and I MEAN NOTHING, the dealer was perplexed as well. Finally Yamaha sent a factory guy out. He took my sled engine APART in a way that would make you cry. He mic'd everything and examined EVERY LAST part. Finally came to the conclusion that some small hardened steel shaft in some part of the injector was out of tolerance due to an incorrect hardening procedure. They replaced the part and the sled worked fine ever since. It was among the most frustrating times of my life. Ride it for a few hours replace 6 plugs, take it to the dealer, nothing wrong... (repeat over and over again for months) Who knows, we could be having some kind of freaky thing like that with our YZ250's... :think: [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
2003 YZ250 jetting
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