Back to working on project again. We all know that the xr600 and xr650L are VERY similar. So when I saw a 102mm xr600 sleeve on fleabay, I got it. Well, it's actually 100mm. Anyway, my machinist pressed out the L sleeve and went to put in the new sleeve and it's just a wee bit small. You can't see the difference, but it "drops" in the cylinder with no interference fit. Guess it makes sense now but they looked the same before. Anyway, if someone needs a NEW LA Sleeve sleeve 100mm (3mm over) for an XR600, let me know.