Hello, new to TT. I have aquired an XL250 1975, and am working on a friends XL350-1978. It seems very difficult to find parts for either one. I need to find a rear sprocket for the 350. maybe someone knows an aftermarket that will fit. nothing seems to cross reference either. I can't find the air filter element foam either, but I think I'll put a pod filter on it. on the XL250, I can't find the parts for the dust cover on the rear axle. the chain came off and tore it up. I think I'll try to make one. any suggestions ?? Oh,,,, and what size of a fork seal driver do I need? Thanks everyone.