locknut

i have just done an engine which has tappet locknuts with nearly 1mm of lateral slop! can i ask any of you checking tappets in the near future fo do this check for me and undo the locknut a 1/4-of-a-turn and see what lateral movement you can get. i had an engine last week that was...

The locknut I found the other day was not the one that came loose last year and wrecked the bike. It is actually the new one that I put in replacement. Same exact valve (intake left). I already talked to Berger about this and he thinks the thread on the adjustment screw might have become...

First the bike started great with Spark's rewound SEM, and I was working on setting the idle and the mixture screw properly, when... HUH? Stalled. I thought, okaaaay, I must have set the idle too low, no biggie. But then I realized the kick start was stuck. I thought the worse and PMed a...