82 XS400SJ's - Engine Sprocket Hand Tight

[63-Coupe]

So there I was last night undoing the final bits and pieces on both bikes preparing to do the engine swap. When I got to the engine sprockets to remove the chains on the one bike it looked like it may have been off before because the washer crimping was rather ragged but the other one appeared to be a "Factory" installation. No big deal on either but what surprised me was that the nut was only hand tight on both bikes. That just doesn't seem correct to me but so far I have been unable to locate a torque spec. for it.

Comments? Is there a torque spec?

 

[foul]

It was pretty loose on my bike aswell, you have to trust the washer xD

 

[63-Coupe]

Thanks foul. It appears that the rotation of the shaft is mostly what keeps this thing tight in addition to the washer.