TB Stock Head, 88cc Bore Kit & 20mm Carb Kit - 1970-1981 Z50A and Z50R Models
88cc Big Bore kit and 20mm Carburetor kit Kit:
Easily double your power and fun with this quality, yet economical bore kit!! We recommend purchasing a high volume oil pump kit (available in this section).
Installation Note: It will save a lot of time and effort if the oil pump is installed while installing the bore kit (requires cylinder removal).