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Wanted: Motolanna XS Swingarm

Started by mlakritz, September 15, 2025, 04:01:04 PM

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mlakritz

Appologize in advance if this is the wrong thread to put a "wanted" in, but attached is a pic of my 250 to 350 '74 RD250A in the "tacking shit up" stage as I build up a sort of retro superbike thing with the heart of an RD. Please ignore the way too long swing arm that makes it look like a busa or a hill climber, i had it lying around and it's just hanging for reference. I would like to play around with a Motolanna swingarm and push my aluminum fab skills (very little) to the limit, but they are currently out of stock and the owner at Motolanna is not sure when he will be making more. This one for the XS: https://www.motolanna.com/ourshop/prod_448876-Swingarm-Aluminum-Alloy-SuperTuff.html

If anybody has one they'd like to get rid of please post up. If this should be moved to a different forum, admins, please move.

Added side note on this project, I am using the Kveldwulf 350 cyls from ebay. They came just a tiny bit out of round and way too little piston clearance (under 1/1000th) but a bit of honing and love from Ron @ HO Motorsports here in Boulder and they are now perfect, including a really nice porting job for the street.

Side note #2, the front end conversion is actually complete, that's a complete 2007 R1 front end with the stock R1 triples and all balls bearings to do the conversion. So easy to do with the help of the guys at Cognitomoto.com getting me the correct size bearings. Super cost effective as well if you use your own clamps, though they make custom triple clamps for almost anything.

RDnuTZ

1987 TZR250R Restricted Japan Domestic market bike (Project)
1977 RD400 (Project)
1974 RD350 (2) (Projects)
1973 RD250 (Project)
2022 Beta 300 X-Trainer, Yamaha Vintage MX, YZ (18)