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.
Design ok , factory tooling has let us down.
Design and factory tooling was adequate pre 2012 motor, New 2012 motor has different vibe as remember they made the balancer shaft for 2012 690.
Ive often viewed pirate racing vids, glad you mentioned it because it really shows some evidence .
Here a german tuner,mech and motor builder with a fairly high reputation in race circles, everybody watch the vid with the autotranslate.
We are talking a 2015\2016 vid where the guy wants to capture the problem on video because it was internet rumours etc.
Nevermind the 80hp 2005-2011 lc4 motors.
Another part of the evidence shows up when he states about the newer lighter grey metal being used and the older dark grey rockers before are different.
Theres 3 evolutions or more with the rocker.
The dark grey with no tool marks in the pin
The dark grey and lighter grey rockers with the punch mark in the centre of the pin
Lighter grey with + tooling mark on the pin.
I would do exactly what pirate suggests aswell, any owners running 2012-2015 motors with the type of cam roller, take them out and get them punched by someone who has the tools, even show them the vid. If you put new rockers in just punch them too.