Hey everyone,.. I just bought a 1986 XR600,.. she runs good but has her share of broken fenders, brake levers, soft rear mono-shock, etc. I am going to be using this primarily in the dirt so want to get rid of those dual sport ties and replace them with some knobbies,.. but the back wheel is a 17 incher and it looks like I need to bump it up to an 18 incher for a better selection of tires. Speedo needs replacing and would really like a source that deals in these bikes alot on-line,... if you were me, and wanted to build a good mountain thumper,... what would you do and where would you go??