5moh YZ450F

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About 5moh YZ450F

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  1. I'll check the chain guides tonight, the top one seamed fine
  2. The bike runs and starts workout much effort, it was just making a little valve noise so I opened it up and found that all intake are around 0.45-0.55mm clearances
  3. So my bike has a very large gap for all of the intake valves, and a lot of tiny chunks of black hard rubbery material in the oil. Just wondering if anyone here could give me a little insight as to what would cause this, and what the chunking could be from.