I think a pretty interesting thread at the MOA forum regarding new-design pushrods for our motors.
push rods
It's my approach to always install "upgraded" parts, so I'm going to put the new style items in mine. (Have already updated throttle control and windscreen mounting)
Also I'm determined to get my motor a little quieter and the left-side chain tensioner thing hasn't helped.
A cursory search doesn't reveal this previously discussed here, but would be interested in input from those familiar with this topic.