BM, thanks for the post. I have 96 Ten which developed a death rattle that I was sure were the Big Ends. But sure enough, upon having a look after having read your post it was a loose nut ( no not the one behind the handlebars:toothy9:). A tighten up with a shifter to the recommended tension ( dead tight plus half a turn) and all is well. The old girl purrs like the proverbial kitten.
Thanks again

H.

Thanks for the info, well written and really clear, thanks!!!

Bike mad,, theres no sound in your youtube vids,,, but in vid 3 is that the nut that needs tightened,,,??? as this is my exact noise heard from the site in another vid.... cheers.

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its there it sounds like a hammer on the back of a vice if you hold the fron brake on and bang it into gear and apply power trying to move forward it knocks its head off same as on deceleration and yes it needs that nut taking off and apply some premanent loctite and a new tab washer . u used the same washer but did one tab over a entire flat side and then the other unused tab i folded into a trinagle over the corner hexagon of the nut

Two things I need help with, the first is what is the part number for lock washer I have the parts manual but cannot determine which washer it is. Secondly what size socket will fit the nut

Yammy XT's aren't the only motors that this problem occurs in. My Ducati 900 two valve had the same prob up around the 50 or 60k km mark. A cheap fix for something you initially believe could be big $$'s is always a welcome relief.

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I went out and bought a socekt for the job which was a 38mm turns out it was the size below but due to it been a impact socket it still drove the mashousive flat sides without a problem . As for the lock washer I was naughty and used the other side as only one side had been used then I folded the other side into a tringle onto the peak of 2 flat sides and also used lock tight but YOU SHOULD REPLACE THE LOCK WASHER to do it correctly. Ash

Sorry for the ignorance. Would the correct fit be a 37mm socket. It's just I can only find 36 or 38 in the store

Anyone got a part number for the lock wAsher as I am not feeling save riding around at the moment especially when I have no idea if it's correctly torqued or not!
Probably wait to another 5000k has passed. Price of changing oil is ridiculous.