It never did this before, but my sprint is freaking out oddly. I just fixed any compression issues and put in a new plug. the carb is more than likely fine since I have only ridden about 50 miles since I cleaned it lase. the bike has about 7250 miles on it with what I think is the original clutch. The idle and start up are completely fine but once I go up hill it loses all power and barely moves as well as struggles changing gear. I have some shit gas but that did not seem to affect it since I made it two miles before it had to completely cool down before starting again. it does not seize though.