170cc/63mm Big Bore Kit - Ceramic/Forged - All KLX140 crf100 lightweight high compression piston kit

lightweight high compression piston kit and gaskets are included complete and ready to go

we highly recommend a professional technician install this kit and the cases bored by a reputable machine shop

- PWK Air Strikers - Directs air to main nozzle for improved signal and throttle response

Notes: You may need to use spacers under the 2 gas tank mounts if clearance is needed for the throttle cable

Case boring requires precision and it creates a ton of metal shavings

170cc/63mm Big Bore Kit - Ceramic/Forged - All KLX140 crf100 lightweight high compression piston kit63mm 170cc Big Bore Kit High Performance Ceramic Cylinder and Forged Piston Includes: Ceramic coated cylinder 63mm Forged Piston w 12: 1 CR Wrist Pin, Rings & Clips Base and Head Gaskets Works with the Stock Head and Crank Ceramic cylinders dissipate heat more efficiently to keep engine temps down. A must have for these KLX140s Re jetting of the carb is needed after installing this kit. We strongly suggest one of the BRT carb kits to go with this as