88cc Big Bore kit,
20mm Carburetor kit, and Race Cam Performance 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
• High performance race camshaft for stock head
• 20mm Performance carb assembly. Includes: 20mm carb, intake, heatstop, gaskets, mounting hardware/wrench, angled dual foam 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.

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).

Fitment:

• 1988-1999 Honda Z50 
• All Years Honda CRF/XR50