While out riding this past weekend, bike ran great except when under a load. While in a mud pit or going up a steep hill (basically whenever it is under a load), it spits and sputters. Almost sounds like a rev limiter. While riding regular, mild mud holes, level trails, small inclines, etc., it runs great. I’ve had the carburetor cleaned but it has sat for a while (possible float issue?). Thanks for the help!