690 Enduro Forum

General Category => 690 Discussion => Topic started by: Philip Pino on May 12, 2016, 04:12:34 pm

Title: cam lobes, odd wear marks
Post by: Philip Pino on May 12, 2016, 04:12:34 pm

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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Title: Re: cam lobes, odd wear marks
Post by: Chef on May 14, 2016, 06:08:18 am

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.

Title: Re: cam lobes, odd wear marks
Post by: Philip Pino on May 15, 2016, 01:01:48 pm

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.

Title: Re: cam lobes, odd wear marks
Post by: coarsegoldkid on October 02, 2017, 04:17:18 pm

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?

Title: Re: cam lobes, odd wear marks
Post by: Taranut on January 04, 2018, 11:23:15 pm

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