Swingarm swap from ST90 to XR70

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Deoodles

Well-Known Member
Hey, I’m working on a 74 XR70 roller. I need a swingarm and rear wheel. I wanted to go with a 16” wheel and that required a swingarm from an early 80’s XL100. Both parts are hard to find. The 14” SL/XR70 rear wheel is another hard to find part. My next best is a swingarm from an ST90 and it’s 14” wheel. Both parts are easy enough to find. It’s getting expensive to guess so I’m asking anyone with a ST90 to measure the swingarm for me please. I really need to know the distance between the swing arm bushings. Where it mounts to the frame. Both the inside distance and the total outside width. It would help me a lot. Thanks!
 
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Deoodles

Well-Known Member
Thanks for the offer. I found a seller on eBay that was gracious enough to measure for me. I have the ST90 swing arm and it fits. It’s big enough to handle a 16” rim if I ever decide to put one on
 
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