Ceramic 63mm Big Bore Kit - 13.5:1 Forged Piston - All KLX140 CRF150F Carb & Fuel 95 mm bolt circle with

95 mm bolt circle with 6mm holes (x4)

or even a combination of new and old

Cannot be installed with the stock primary clutch at the same time

ALL KX 65 (2000-Current)

Features Include:

Ceramic 63mm Big Bore Kit - 13.5:1 Forged Piston - All KLX140 CRF150F Carb & Fuel 95 mm bolt circle with63mm Forged Piston and Ceramic Cylinder Kit 13. 5: 1 Forged Piston for the 31 25 heads and +6 Stroke Crank Includes: Ceramic Coated Cylinder 63mm Forged Piston Kit w 13. 5: 1 CR Valve Reliefs cut specific for the BRT 31 25 Head Wrist Pin Height specific for use on the +6mm BRT Stroker Crank Wrist Pin, Rings, and Clips Head and Base Gaskets Ceramic cylinders dissipate heat more efficiently to keep engine temps down. A must have for these KLX140s Notes: