Used as a replacement carb on some Pursang, Frontera, and road racing Metrallas. Adapters are
needed for some models. They only come pre jetted for each model is YOU supply the serial number. Some models may need fine tuning. The engine side dimension of the carb 40mm and air box side of the carb dimension is 58mm.
Mikuni Carburetor 34mm
Please supply your Bultaco motor serial number so we can jet the carb for your application.