So I have an 03 XR50. Carb was junk from sitting for a few years with gas in it. Any way swapped out for a new carb. Turn the fuel on... fills so much that it runs like a river out of the air intake. Pulled it all apart, put it back together same thing. Said screw it I’ll order another carb. Order another one installed it, it will only start if it’s choked and when It runs its revved out to the absolute max. Throttle has snap back Return. No super snappy but enough to return the throttle. I’ve pulled it apart god knows how many times now and I’m ready to burn it to the ground!