If your pit bike isn’t fast enough, then add this bolt-on Pit Boss 88cc big bore kit to your CRF and light it up! About all you need to do is follow the extensive directions and tune the carburetor appropriately for your preferred fuel and then it’s time to hit the road! Everything you need to bore-out your CRF or XR 50 is included in this kit: Aluminum cylinder head Cam Piston, rings, circlips & wrist pin Keihin carburetor with throttle cable Intake manifold and air filter All required gaskets For more information, call TJ at 866.931.6644 x 817 or send a note to WERA at RIDERSDISCOUNT dot COM with XR50 CRF50 BIG BORE KIT in the subject line and we’ll get back to you right away. The entire kit is securely packaged. The Keihin carburetor includes an extra-long throttle cable. This overhead cam replaces the OEM unit. 52mm piston kit. Aluminum cylinder head. The complete gasket and O-ring kit includes everything you need to assemble the top end of the Honda minibike’s motor.