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08 Honda 420 timing issue?

3403 Views 9 Replies 5 Participants Last post by  shadetree
I rebuilt this bike from mud junk that didn’t run. Now it will start but blows out the throttle body. Valves are adjusted tdc on compression stoke ok and cam is set correctly under front cover with a new timing chain.
Is it safe to say the cam is bad?
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Either the valve timing is off or the intake valve is too tight or the intake valve is sticking. I can't see where a bad cam could cause this problem
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