My MC18 (project Wet Dog) is to far from standard to make it worth putting back to standard. I thought I would create an NSR500V rep but I would need a single sided swing arm. I have sourced with a RVF or VFR arm for the job. Question is has anyone tried this conversion with the MC18 already and any pitfalls that I would come across?

I did a forum search but didn't come across anything but I am never too good on the search button I always seem to miss the bloody obvious

Yes, dunkenb has done this conversion, go back a couple of pages on members builds.
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Proud Father of , 05 ktm 400exc supermoto 2018 honda crf rx supermoto

Or an MC28 arm

28 arms seem far and few these days