I am wondering what the differences are between the early 1990's (pre-96) xr250 and xlr250? I have been told quickly, rear suspension, cam, piston, plastic vs steel gas tank. I noticed that the xlr swing arm has holes for mounting pegs but didn't notice any other significant difference in the swing arm. The xlr also has a steel gas tank and the xr has plastic. Does anyone know more specifically what the differences are in the motor? Is it actually a different piston? If so, I guess longer or shorter stroke? The sprocket set ups are obviously different too but thats pretty minor anyways. Lastly, the R or L after the 250 number refers only to it being set up light-wise for legal road use, right? No performance differences in that last letter? And since we are on the topic, how about Bajas? There can be xr and xlr bajas right? The baja model just has a bigger gas tank and dual lights, no other differences? So is there any easy way to identify it visually other than the gas tank and swing arm? Please fill me and/or correct me in on what I missed here. Thanks for the info.