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What all possible causes of a stock piston hitting the intake valves??? How much damage could have been done? Still safe to run that head with those valves??? Help!!!!!!

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usually it is from floating your valves do to over reving the motor and your valve springs are to week or a timing problem. As far as running the valves I would go have them checked for being true or you could cause seriouse damage to your head if their is not already damage.

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Which bike brent? Big D's?

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<div class="FTQUOTE"><begin quote>Originally posted by: Scatterbrain

Which bike brent? Big D's?</end quote></div>

Yep on his. We thought it was an exhaust leak with those LTE's, but now it appears that it was not. I had a ported head with shim unders and 109 cams on it. The top of the piston is scrapped where the intakes are. I must have screwed the timing when I messed with it last. The line on the exhaust cam sprocket was exact, but the one on the intake side was up about 2 teeth I am guessing. I don't understand why it would have been off. I was very cautious of that when I installed last time

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<div class="FTQUOTE"><begin quote>Originally posted by: Tpsycho

usually it is from floating your valves do to over reving the motor and your valve springs are to week or a timing problem. As far as running the valves I would go have them checked for being true or you could cause seriouse damage to your head if their is not already damage.</end quote></div>

I was hoping timing would not be an answer, as that makes it my screw up!! Fill in a line of un-usable adjectives currently being thrown at myself!!!

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Ok here is where we stand. Thanks to Eric, and a quick simple test we were able to determine that one valve is bent. So yes, that is a bummer. However, I did manage to find a builder close by that can swap the valves for me. I have some extra in another head that I just happen to have sitting around. This is why I horde every part I can get my hands on. So it is now looking like what was close to a huge bum out, is now just a little hurdle. I should still be all back together and on the road early Friday morning. Thanks for the imput....

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Brenton, if the builder cannot get them done, let me know. I can bring the valve press and we can do it there.

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I would check the specs on your came chain tentioner and make sure it is all rite just in case I doubt it is the culprit but their is always a possability.