washers
As far as I know it has occurred with XT600's that the balancer shaft nut loosened up with devastating results. For the older 660's this has happened with the crankshaft nut (right side). The fix is to remove clutch cover and clutch, loosen the relevant nuts and torque them again to the required torque and a bit more, with NEW TABWASHERS.
To remove the clutch you could just block the rear wheel with a rope, put the bike in gear. For the balancer shaft and crankshaft nut you could insert a copper or aluminum washer between the gears.
tabwasher crankshaft nut: 90215-20197
tabwasher balancer shaft nut: 90215-16242
tw clutch nut: don't have that.
The flywheel nut has no tabwasher, and is not known for undoing itself. But would not hurt to check while you are at it anyway. No need to remove LH cover.
Auke
|