Looking at an XS750 for a project but it needs to be chain drive. I remember hearing there was a kit for it but I'm sure those are all gone now. Is it a big deal to do? I do a little machine work and I'm always up for a challenge.
the coolest and most complete site for xs750 related info when up in flames about 7-8 years ago. Entire database lost... everything you could every want to know about that bike was in there. I recall a couple chain drive conversion threads. Not for the faint of heart. i think the middle drive gear (removing it requires a brace for the sprocket), chain clearances with the frame and distance of the counter sprocket to swingarm pivot were major issues.
I seem to recall that the largest countershaft sprocket that would fit before there was case clearance issues in front of the cs was 13t. I think I saw pics of one that had modifieed the cases by cutting and welding to allow a larger cs.
Fondly remembering those years when a two year model run for a Japanese motorcycle was considered a career ending design failure.