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Everything Dirt Bike
Make / Model Specific
Yamaha
Gas ratio
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<blockquote data-quote="VMax" data-source="post: 191963" data-attributes="member: 1689"><p>I've never been able to get a good reading on a new plug! Also, ANY idle time or time OFF of main jet,"WOT" will give you a false reading. To be accurate you should kill engine under WOT, then pull used plug and inspect. It is poss that u just need to adjust idle air screw! I may not be an expert but I havnt fouled a plug in over 20 plus yrs and have had only 1 lean engine seize in as many yrs. in which it was totally my fault! Although I do seem to push the leaner side! Also, almost all engine seizes do to a lean burn, happens the moment you shut the throttle off. That being said, when temp has dropped, and Ive been caught running lean, when decelerating, I always hold kill switch with throttle open to keep piston/cyl well lubed!</p><p>Moral of the story, beer is good!</p></blockquote><p></p>
[QUOTE="VMax, post: 191963, member: 1689"] I've never been able to get a good reading on a new plug! Also, ANY idle time or time OFF of main jet,"WOT" will give you a false reading. To be accurate you should kill engine under WOT, then pull used plug and inspect. It is poss that u just need to adjust idle air screw! I may not be an expert but I havnt fouled a plug in over 20 plus yrs and have had only 1 lean engine seize in as many yrs. in which it was totally my fault! Although I do seem to push the leaner side! Also, almost all engine seizes do to a lean burn, happens the moment you shut the throttle off. That being said, when temp has dropped, and Ive been caught running lean, when decelerating, I always hold kill switch with throttle open to keep piston/cyl well lubed! Moral of the story, beer is good! [/QUOTE]
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Gas ratio
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