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Discussion Starter #1
I am currently rebuilding the top end of a CX500 engine and have encountered excessive wear in the valve rocker gear. The bushes inside the rockers and one end of the rocker shafts are excessively worn. I am unsure if this is a problem with this particular engine or is a general fault that other people have encountered whilst doing rebuilds. I would be appreciate any feedback on a fix for this problem.

Happy Paddock
 

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Discussion Starter #3
No Blockage in the oil gallery. Oil was very old and there is evidence of overheating of the rocker shafts. I suppose I am trying to find out if this is a common fault with these engines. I have never rebuilt one of these before and if it is a common fault what is the best way to fix?
 

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Once these have a reasonably high milage upper rocker and rocker pin wear is to be expected.

the upside is that the motors don't seem to care too much.
 
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