NEW BBR XR/CRF100 120cc Big Bore Kit with Cam. Increased displacement, higher compression and large cooling fins enhance the performance and longevity of the motor.
This is the only XR/CRF100 bore kit that matches the new rocker arms perfectly to the new high-performance BBR cam shaft. This kit is ready to go and bolts on with no case boring required. Dyno tests show more than 2HP gain with this kit.Fits ALL model year XR and CRF100's. Increased displacement High compression High performance camshaft with HD valve springs New rocker arms and adjusters BBR Large fin, aluminum cylinder with steel liner 58mm piston, ring set, piston pin & clips Gasket kit including cylinder head and base gaskets Fits 1981-Present year XR/CRF100's BBR General Jetting Guidelines ChartStock XR/CRF100 - 53.0mm bore, 45.0mm stroke 120cc Big Bore Kit with Cam - XR/CRF100 Instructions. High performance camshaft with HD valve springs. New rocker arms and adjusters. BBR Large fin, aluminum cylinder with steel liner.
58mm piston, ring set, piston pin & clips. Gasket kit including cylinder head and base gaskets. Fits 1981-Present year XR/CRF100's. BBR General Jetting Guidelines Chart. Stock XR/CRF100 - 53.0mm bore, 45.0mm stroke. 120cc Big Bore Kit with Cam - XR/CRF100 Instructions. Sorry, our items are NOT available for pick-up. No additional information at this time. NEW BBR Tall Seat Assembly - BBR CRF/XR50. NEW BBR Tall Seat Cover (Black) - CRF110F, 19 - Present. NEW BBR Tall Seat Cover (Red) - CRF110/125F, 19 - Present. NEW BBR BBR KLX/DRZ110 143cc Big Bore Kit.