Qingqi Mustang 100 has used three engines, namely Suzuki AX 100 engine, Suzuki K 100 engine and Yayiha DX 100 engine. Among them, the throttle lines of Suzuki AX and K engines are basically the same, and they can be used generally. Motorcycle parts stores should have them, but now there are few two kinds of motorcycles. If the DX 100 engine is slightly different, but many two-stroke tricycles used this engine before, you should also be able to buy the throttle line. If it really doesn't work, it can also be modified with AX 100 throttle line.