Well - I think many (including myself) have dreamed about this before but I'm not aware (that I can recall) of someone getting this far as successfully on a rear swing arm swap for an XT600 - Well done! I'm very interested in precisely what you have done. So is it an SX swing arm with an EXC shock & 15mm EXC pivot bolt? Did you investigate other versions & rule them out for any reason - ie did you discover a list of swing arms that you thought might work before settling on this one. Did you have to cut & reweld the lower shock mount to centre it or have you done something else? Did you or will you make bushes for the pivot bolt or will you do something else? Can you take some more close up pictures of these things & perhaps list a little more info on the mods you've done please? Sorry for all the questions - I am VERY interested, please share more details as I'm sure that there will be others who will search the ADV thumper threads looking for this kind of thing - just as I came across yours!! Excellent work Thanks so much for keeping this updated!