I went to install a front wheel on one of my bikes yesterday and found that the wheel and axle/spacers combination didn't work!!! I've lost track of which wheels come from what, but this front wheel seems to have too little distance between the bearings, i.e. when I put the front axle and spacers in, the front wheel is loose, and there are gaps ... I can't tighten the from axle bolt.

I've looked in the parts manual for the correct spacers, but it is impossible to tell from the pictures. My spacers look the same as the ones in the pictures, so maybe it is the tube between the bearings inside the axle that is too short?

Any help on this would be much appreciated, as I am quite confused, and don't know what parts I need to order to make this wheel fit. It looks completely normal in every other way.

Oh! The bike is an MC21,and the wheel ... I THOUGHT was off an MC21 but now I am beginning to wonder where the hell it came from.
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MC28 SE -sold-
MC21 with RS250 engine -for sale-
MC21 race bike -soon for sale-