07-09-12, 09:12 AM
So far as I'm aware, nobody has had problems with the front sprocket nut until after it has been replaced at least once.
The problem was a slight design flaw: the thread is very fine and the original nut was quite slim so there weren't many turns providing grip... it gets loose and jiggles about on the end of the shaft. If you don't notice this it eventually wrecks the thread on the shaft . Additionally the sprocket is free to wander about sideways damaging itself and the chain.
The solution is the thicker sprocket nut, but beyond a quick check that everything is in place I wouldn't worry about it until you come to change the C&S.
More important is to check the gearbox: the transition from first to second is the one that can give trouble, if it's easier to find a false neutral than second gear... walk away.
Braided lines: just less squidgy than the OE ones. Added to which, I think Yamaha recommend changing them after 4 years anyway, the original rubber ones can crack and perish.
The problem was a slight design flaw: the thread is very fine and the original nut was quite slim so there weren't many turns providing grip... it gets loose and jiggles about on the end of the shaft. If you don't notice this it eventually wrecks the thread on the shaft . Additionally the sprocket is free to wander about sideways damaging itself and the chain.
The solution is the thicker sprocket nut, but beyond a quick check that everything is in place I wouldn't worry about it until you come to change the C&S.
More important is to check the gearbox: the transition from first to second is the one that can give trouble, if it's easier to find a false neutral than second gear... walk away.
Braided lines: just less squidgy than the OE ones. Added to which, I think Yamaha recommend changing them after 4 years anyway, the original rubber ones can crack and perish.