Front sprocket nut???

[dps650rider]

I believe that the real reason these come loose are sprockets with a loosely fitting spline. I can remember having to use a puller to get a sprocket off the spline because it fit so tight, I think that is what is needed here. No matter how tight the nut is eventually it will work back and forth a bit and loosen up.

I tried something a while back that helped, I built up the inner surface of the sprocket where it engages the spline with a bit of weld at a couple points, then carefully ground down the weld until it fit on the shaft tightly enough that I had to put the nut on and use it to seat the sprocket.

Didn't come loose for a long time after that. I did the same with the cannibalized sprocket I used to adapt the belt drive sprocket and it too stays tight. I wonder if new OEM sprockets are still available and how they would fit the shaft.

 

[retiredgentleman]

I found my front sprocket nut loose a few years ago. Torqued it to 80 ft-lbs, and its been fine ever since, and no oil leakage.

 

[pcoumbe]

I use loctite bearing mount, then torque to 50lbft, then impact wrench to line up the lock tab. Haven't had one come loose for a long time.

 

[Equalizer]

Thank you guys for all the help. I no longer have oil leaking on my floor.

 

[jayel]

pack the splines inside the #26 bushing with heavy grease, if nothing else it will take the oil longer to migrate thru