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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
Crf250 Fuel
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[QUOTE="MikeS, post: 849015, member: 18813"] Is that U4 or U4e? I just got a 04 CRF250X. Steady diet of pump gas. The original head had 400 miles+ of race action. The valves are crusty, Very. There is an new 05 head/cam on it. It had a few hours on pump gas. I started to run VP MS109 it is Oxygenated and unleaded. Rich seems to feel the lead in U4 may not be the very best for the Ti valves but the jury is out on this. [/QUOTE]
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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
Crf250 Fuel
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