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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
Crf250 Fuel
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[QUOTE="ACGUY, post: 848914, member: 21711"] [b]Not sure .... but![/b] I'm not sure who actually wins the Jerry Springer noob posting war, but with regard to certain fuels..... I have a fresh teardown CRF250R head in front of me that ran U4, and the intake valves have approx. 2mm of pink crust on their faces apparently from the U4. The valves were installed ten hours ago. I don't think it would rob too much power, but when you get into the discussion concerning valve float at RPM, I'm sure the extra mass of the valve+crust= more float susceptability and shorter valve life. You know; that "Honda" problem? [/QUOTE]
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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
Crf250 Fuel
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