thicker sprocket nut worth a check

[fazersharp]

Am I correct in thinking that it wasn't the original nut and torque spec that was at fault but it was an issue with some of the output shafts being slightly undersized, thus allowing the nut to work free?.

I think I can say that the general consensus is that yes that is the case, and it is the luck of the draw if your shaft is undersized which explains why some have the issue and others not.

My own research and theory points to the first 98 models being unaffected as the shafts were done in 1 factory and then the bike took off and the shafts had to be made in other factories to keep up with demand, then there is a cut off time when the problem was spotted and after that the shafts were in spec and the 12mm nut was issued as a fix instead of swapping the shafts on affected bikes. :lurk

Over the years on this forum not 1 98 bike has had the problem --- with the caveat being that it has to of occurred on a factory fitted nut, so as to rule out a replacement not being correctly fitted. Admittedly a 98 on original sprockets is getting rare although I have one.