690 Discussion > 690 Discussion

cam lobes, odd wear marks

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Philip Pino:
Hey guys, I just tore into the cylinder head to check the valve clearances before I go on a long ride next month and this is what I found.  Has anybody experienced this.  The bike has about 5300 miles on it. 

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Chef:
Scoring on the rocker rollers is pretty normal. I would be concerned with the rockers with that wear on the cam lobes. I would replace the rockers for sure....or at least the one.

Philip Pino:
Chef, thank you for the advice.  I've showed the pics to my local dealer's service dept. and they say the marks are from normal wear and not to worry about it.  However, I am skeptical and I asked them to contact their KTM tech-rep to get their opinion.  So its a waiting game right now.

coarsegoldkid:
The rockers don't look bad to me.  If the bearing has any up or down movement change the rocker. The cam lobe is certainly scratched.  The surfaces are very hard to scratch under normal conditions. What would cause that I can only guess.  Did you run without oil?  Did the engine need any shim adjustment?  What was the before and after clearance measurements?

Taranut:
I have the same problem. I want to repair it, can I repair it?

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