Me and my dad are selling our street bikes and getting XR650s. Probably Ls. Is there anything different on them except for the street legal stuff? Is there a different cam or anything? Is all the aftermarket stuff the same or is it all pretty much different? We'll be mostly riding street with some side trails mixed in so the L would be better. And were getting used ones so is there anything to look for on them specifically? I have a 400R and a 50R and had a 200R so I do know alot of stuff bout XRs in general. Thanks for the help.