About 5 moths ago I made the stupid choice to buy a bayou 250 from a kid like 3 hours from my house. Bike was rough but I am mechanically enclined and so is part of my family so I figured I wouldn’t be in over my head. Bike ran rough and didn’t want to rev up in neutral at all. Adjusted valves and timing and that didn’t help. Had a aftermarket carb and once I replaced that with stock it ran better. Now it will rev up in neutral but ONLY IF THERE IS NO AIRFILTER OR AIRFILTER PIPE. it can’t take any restriction. But it will rev in neutral fine with out. But apon trying to drive it is very slow to accelerate even at full throttle , spent a lot of money and time in this bike and I’m really frustrated now , and help would be appreciated