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how'd it happen? a valve timing issue? clearance issue?
 

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Those are the intake valves and don't usually get bent with poor clearance. it had to be either a stuck valve or if more than one is ben cam timing. skipping even 1 tooth on the timing will bent them all.
you hav if off know but be careful about resetting it correctly. those valve are pricy you might want to se about straightening them. a good mach shop can do this or you can send them to FOG

FOG
 

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The bike was making funny clanking sound when starting sometimes and sometimes it would not even turn so I did a valve adjustment through the cam and rocker arms and didnt turn the motor to check for binding and I put it back together and tried to start it and it was definitely jammed so I pull the head off and found that. But I already ordered another head from ebay
 
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