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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
gas question
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[QUOTE="Rich Rohrich, post: 622773, member: 16241"] At 6 grams per gallon which is pretty common on some of the newer fuels deposits in the exhaust ports build up amazing fast if the jetting and cam timing are not dead on. On small port engines like the 250F and TTR 125, they can build up faster in fact then I would have believed possible. The valve acceleration rates on current MX engines are harsh enough that lead won't combat recession issues. For better or worse, OEM valve train parts have pretty much become disposable commodities. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
gas question
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