There's another thread on here somewhere..... with really good pics of failed rocker bearings etc etc ...... I'll try to find it again....
It is certainly more common than I thought!:surprise: 'Not a common occurance'....... :surprise:....... that would be his way of backing out of any warranty or any further dealership assistance - not that I'm experienced with the 690, but there seems to be a common thread on forums dealing with rocker arm bearings failures on certain models.
One thought I had which may have relevance...... oil....... what oil do you use? And how often do you change it?
I only ask this because after years of wondering - I have only recently discovered that some of the oils we take for granted as being "the best" are actually no good for regular road riders..... in particular, the racing double esthers (I have read the marketing blurb sheets claiming they are suitable for street bikes however - a Motul contact and several service tech's and a recent bike magazine published oil article advise that racing blends have no long life polymers for extended street/touring riding) - you might only do 2000km a year racing so might be ok?.
As an example...... my Honda Blackbird has done 130,000 kms with no detectable change to valve clearances using Motul 5100 (semisyn/mid strength FS...????) 10w50 oil with changes every 6000kms (=half manufacturers spec schedule). When it had 114,000kms up it's cam chain and tensioner needed replacing...... that was an unmistakable continuous loud rattle..... not the valv'ie clatter on your video :wink2:.
I suspect your valves haven't worn, but your rocker arm bearing has - thus the change to the clearances....... :surprise:...... but like I said...... not a 690 expert...... :wink2:
What did KTM do to rectify the problem on the newer + type?
Could you explain why the pins are punched/not punched? I'd imagine them to be hardened steel. Thanks
Design ok , factory tooling has let us down.There is a video in German, or Austrian or some language in that area, by pirate racing where they fix the issue. The language barrier is unimportant.
I used to comment valve lever bearings on the bottom of random comments but nobody really ever seemed to give a damn. It's a **** design by KTM.