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2008 crf250 valves

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I pulled the carb off my buddys 08 cfr250 and looked down at the intake valves and there are a bunch of aluminum shavings sitting on top of the valves. There is only about 15 hrs on the bike. Any ideas??

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sure its aluminum? not carbon build up with oil on it to give it a glossy/shiny look.. get a pic if you can..

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I'm going to pull the head off tonight. I've been trying to figure out how anything could sit on top of the intake valves without being sucked into the engine. It's driving me nuts! I'll post to let you know what i find.

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