xt550 - who wants to have a go at knock troubleshooting!!
long story of course ....
this is the sound of my 83 xt550 - not all that pretty.
it started to sound like this just after I had a really bad kickback incident due to a faulty pickup coil. - solved that one. but inherited this knock.
xt550 engine knock - YouTube
- this is just after is started about a year ago.
XT550 - persisting knock - YouTube
- this is a few months later.
I first diagnosed this as cam chain, so i went in and replaced the cam chain, checked the tensioner and replaced one slightly worn cam chain guide. put it back together and re adjusted the valves and yet it still persisted.
the knock is only at idle, and the lower the idle, the worse it gets. But sometimes, the knock will stop and the engine will run smoothly ... and quietly ... just like it is supposed to, then ... a moment later the knock will start up again. (pretty infrequent that this happens, once in a blue moon really.)
it is a knocking noise that appears to be coming from the right hand side of the crank case, although it is quite hard to spot, even with a stethoscope.
I have had the clutch side apart and there wasn't anything that jumped out at me as being wrong or too out of wack. Also showed it to a couple mechanic friends of mine, they said everything looked about right and said they couldn't really tell unless they took everything apart measured all the tolleranced and compared it to the manual.
well I am trying to advoid taking the crankcase apart. Although I am taking the head off to do my rings next week and thought I could tear into the clutch side a bit more if I knew what I was looking for -
Any ideas would be helpfull.
sheared woodruf key on the main gear?
Thanks in advance.