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Hondas4Life3
4/7/2017 9:16am
4/7/2017 9:16am
So I think I know the answer... New valves. But I wanted second opinions on what could have caused this. Im working on a 2010 KX250f. The exhaust valves were .001 tighter than spec. One intake was dead on. The other intake however was completely stuck open. The bike had almost zero compression and it went from a 2.95mm shim to a 2.70mm shim to get it back to spec. It has a complete procircuit head with their cams, springs, etc.
Why would only one be .010 tight and the other stay perfectly in spec? That seems like a lot of adjustment to get back to spec.. The intakes are supposed to be at .004 -.006
Why would only one be .010 tight and the other stay perfectly in spec? That seems like a lot of adjustment to get back to spec.. The intakes are supposed to be at .004 -.006
One valve out of 4 is wearing .01" then it leads me to believe something is faulty. Whether its the seat or whatever. Based on your post i would take it apart and break out the calipers.
Which intake valve was the tightest?
Paw Paw
The Shop
If its not a result of common wear im thinking it may have dropped a guide slightly.
Paw Paw
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