Output/Drive Shaft Spline Wear

[Lars]

I have the same problem too. You can wiggle it back and forth on the shaft. But it is not a problem, I got it since I have the bike. It has had it from 20.000 km until now, with 46500 km's. It doesn't get really worse. Just put some grease on it to slow the process.  If the splines ever wear off, your bike will be very old and if it isn't, you go to the junkyard to pick up a new shaft