Another Loose Sprocket Nut

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<!--quoteo(post=43965:date=Wed 13th Jun 2007, 09:47 PM:name=Toneski)-->QUOTE(Toneski @ Wed 13th Jun 2007, 09:47 PM) <{POST_SNAPBACK}><!--quotec-->the thread on my output shaft is already damaged from when the sprocket jumped the first time
when it came loose in Germany it didnt turn
it just pulled over the thread, even tho it was torqued correctly<!--QuoteEnd--><!--QuoteEEnd-->

Sounds to me as though it came loose from loss of clamping pressure (not the nut coming loose) and then damaged the thread which allowed the nut to 'jump' the thread

there's no way it jumped the thread whilst it was still tight.

So, loctite it onto the shaft with 638, which will prevent the rocking back and forth, will will prevent the loss of clamping pressure, which will prevent the nut jumping over threads and damaging them

I know its too late for you Toneski, but for others it is not


<!--quoteo(post=44226:date=Fri 15th Jun 2007, 09:55 PM:name=ChrisG)-->QUOTE(ChrisG @ Fri 15th Jun 2007, 09:55 PM) <{POST_SNAPBACK}><!--quotec-->I suspect my problems stem from not having done the nut up tight enough when I replaced the sprocket some years back. General consesus seems to be to use a genuine Yamaha sprocket rather than an aftermarket.<!--QuoteEnd--><!--QuoteEEnd-->


Cheap sprockets with excess clearance between it and the splined shaft would accelerate the wear effect of the sprocket rocking back and forth