engine sprocket nut loose ?

[oldpara]

I was cleaning out behind the engine cover over the sproket.
I noticed that the sprocket nut was not tight against the washer is this normal ?
Also, I can wriggle the sprocket laterally a small amount, again, normal ?
Seems not right to me because the manual says to tighten to around
70 lb/ft.
And I wouldn't think that sprocket should move/shuck a small amount like it's ID is larger than the shaft OD.
Thanks

[koolaid_kid]

It is not normal. You need to investigate further.

[chuck hahn]

If it is tightened to specs and still wiggles even a bit then theres something else internally in the trans happening. It otherewise should not wiggle side to side.

[7981GS]

If your inner shaft splines on the sprocket are now worn, I have plenty of good C/S sprockets with 15T that I could send you one for the price of shipping/Paypal cost.
$6.00

Daniel

[pete]

You'll need to check it closely, definitely not good!

When I first bought my 450 the counter shaft sprocket was loose.

When I spoke to a mechanic about it (before I was a member here) he said replace the sprocket and check the splines. 9 times out of 10 the splines on the shaft are harder than the sprocket and won't wear much if at all depending on how long it was ridden like that.

I checked my counter shaft out while I had the engine apart and it seems ok, saved me about $250 for a NOS part.

Make sure you replace the sprocket and torque it right!

[oldpara]

OK, thanks guys, I'm glad I was cleaning up and found it.
Apparantly not something you'd just go looking for.
What would be some possible bad scenarios because of the loosenes/wobble ?

[pete]

What I noticed with mine was extra snatch in the drive chain from closed throttle, but I could work around that with the clutch until I found what it was.

Worst case is split the cases and replace the counter shaft in the gearbox... which is why I checked mine thoroughly while I had the cases split.