TB Race Head 88cc Big Bore kit and 20mm Carburetor Performance Kit

TB Race Head, 88cc Bore & 20mm Carb Kit – Z50R, XR50, XR70 and Other Models This complete 88cc Race Head Kit will really wake up your stock engine and is comparable in power to the much larger Chinese 124cc engines!!! They are extremely reliable as well! This kit works on the following models: 88 thru present Z50R, XR50, and CRF50 All XR70 and CRF70 (Note: For the 88-91 Z50R, the newer style 2 bolt cam sprocket will be needed. We have them available in this section and the part number is TBW0861) UPDATE – Until further notice, this kit will also include the following items at no extra charge!!! 6 Piece main jet kit for the 20mm carb ($10 savings) High Volume oil pump ($25 savings) Clutch cover gasket ($3 savings) Performance CDI ($25 savings) Lightweight aluminum cylinder with steel sleeve Cast in mounts on cylinder for aftermarket skid plates Oversized cooling fins on cylinder for efficient heat dissipation 52mm high compression piston with rings, pin, & clips Head gasket