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The pinion carrier got some new bearings and then a bit of fiddly stuff to while away a few hours.Working to a half millimeter is normally close enough.First thing I noticed but standard for any stepped shaft with a fillet was the heavy shims were only beveled on the ID on one side, a check showed installed the right way the shim was flush.The new bearings were a little tight so the pinion shaft got a very light polish in the lathe and trial fit until they pushed on with moderate force without binding.A quick look on MG Cycle past orders showed I had got some spare pinion shims last year so hunted them down. (Both of the final drives, original and eBay only had 0.15 mm shims)With a bit of juggling of tube spacers and shims I got it down to a reliable 0.02 mm (less than 0.001") end float with the nut pulled up.I don't know how hot these things get and if the pinion carrier housing will grow closing up that end float, I might try and get a little more tomorrow but under 0.05 mm.
Howdy,by any chance did you change the main bearings? I am looking for used undersize that I can fit to my crank.
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