I just finished a Lifan 125cc engine swap into my panterra 90cc frame and I'm having issues with the carburetor I used from my old 86cc engine. I can get the bike to run relatively well, it idles fine and if you ease onto the power it goes like Hell, but the power delivery is choppy at best. I know this thing needs more fuel than the stock jets can give it, but I can't figure out what the carb model or size is. The side of the carb says sheng wey d19 but I can't find this exact carburetor anywhere. Can anyone tell me what this carb is? Where to find jets? And maybe give me a good base idea of what size I should be running? I'm not the best when it comes to carburetion so don't make too much fun of me lol.