Front sprocket nut

[Lumpy]

for the record, the tension on the chain will keep the sprocket on the spline unless the wheel is badly misaligned, over use can cause play to be introduced in the spline and for the threads to wear. The tab washer should hold the nut in place if used properly. I had a TDM 850 where the nut had completely come off and never had an issue. I didn't know it had but it had been off for ages. The end result was no damage amazingly. Not to be recommended but it's not as scary as it's made out to be.