I am gathering parts to build my bike. I have a 79 xs and have picked up a 99 gxsr750 inverted front end for it, I want to run the wider wheels and tires that are used on street bikes. My son tracks a R6 and has a plentyful source for used race tires at a good price, LOTS of meat left for street guys. Any how, I know I may have to move my chain over a bit. I also have a RM350-PE250 rear aluminum swing arm that I'm going to try and use. It is 1" wide thru the fork area than a XS is so i'm sure I have room for the tires. . Just wonder what other guys have done so they can run modern type tires. I saw in Motor cyclist this month where a guy in San Diego builds street trackers" MULE" and he has someone out there that can widen mag wheels for modern tires. I'm just trying to get a discussioin going on doing this . Lets hear some ideas people.