ok great. One last question, between the 2 main bearings (#32) there is #15, mine doesn't have the 3 prongs on it, but should it fit tightly between the bearings or ride loosely?
It floats loosely, a little. We're talking thousandths of an inch, not 1/8ths of an inch. Just enough that you can get the axle thru. The 3 prongs are to help hold it in position so that the axle will slide through it. I'm not sure if the 3 prongs are necessary to build the stack mentioned next.
EDIT: I checked and the 3 pronged flange is not part of the "pipe". It merely holds the spacer loosely in place so the axle can go through it. Without it, that spacer could conceivably be knocked far enough askew that the axle would hit it and stop when you are inserting it. No problem, just line it up and go again. End EDIT
If you can picture this concept, the "stack" of the spacers and the inner races of the bearings, create a solid continuous "pipe" from swingarm to swingarm. No matter how tight you make the axle nut you cannot compress this pipe. The plates and hub ride arouind the pipe.
When you tighten the nut, the bearings in the hub, one of which is a floater, compress on #15 and it becomes part of the solid pipe. The pipe, like the axle, does not turn.
