Cooter puts spools on an XB
STT actually. I don't know if this is exactly the same for the shorter swing arm, but it would be easy enough to find out, and I will when I attack The XB9-SX next!
For $5 you really can't go wrong. I looked for a set that had a flange at the base for stability against a swingarm without a thick tab. And an 8mm bolt. I'm sure 6mm would be fine but bigger is better right? 8mm will also fit a 5/16" bolt perfectly. Murica'
https://www.ebay.com/itm/CNC-Swingar...72.m2749.l2649
Take your wheel off lazy guy. It will make your life so much easier.
Left side inside:
https://farm1.staticflickr.com/979/2...ebb4bc5a84.jpg
Right side inside:
https://farm1.staticflickr.com/978/2...09df2e4dfd.jpg
I wanted to make sure they were equal, and it turns out it was really easy.