We currently have a YZ100D that's causing a little bit of a headache. When tightening the nut on the rear axle it binds against the shoulder at the end of the thread rather clamping everything together, a previous owner had put an old sprocket between the nut and the swing arm to stop it happening. We've removed the bearings and spacers and put them in place on the axle and it seems there is just short of 5mm missing somewhere. We've also lined up the chain run and measured a couple of points on the hub which confirms it.
I have a feeling it may be the sleeve that sits between the bearings and ours measures 105mm. Does anyone have a rear wheel apart to confirm this?