TB Stock Head, 88cc Bore Kit & 20mm Carb Kit – K1-78 Models
88cc Big Bore kit and 20mm Carburetor kit Kit:
– Lightweight aluminum cylinder with steel sleeve
– Cast in mounts on cylinder for aftermarket skid plates
– Oversized cooling fins on cylinder for efficient heat dissipation
– High compression 52mm piston with rings, pin, & clips
– Head gasket kit
– 20mm Performance carb assembly. Includes: 20mm carb, intake, heatstop, gaskets, mounting hardware/wrench, air filter and long throttle cable
– NEW! 12/08 – a main jet kit is now included too!
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
See the Performance Info section for additional information on our performance parts.