Okay so I recently picked up a tb for $500. It needed some brake work new rear hubs and had idling problems. I have everything fixed minus the carb problems. The original Mikuni has all the screws totally stripped and unable to get them out. So I bought a replacement carburetor and put it on. Everything looks identical and it went right in. It fixed the idle perfectly but everything else was crap. Any sudden throttle will stall it out, but if I ease into it I can get to 3/4 throttle but then I can tell it’s running very rich. I’ve tried cleaning the carb adjusting the needle and checked the main jet is the same size as factory. Lost on where to go from here. I think it’s running rich but don’t know how to fix it. Any help appreciated.