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. 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. The item "BBR Big Bore Engine Motor Kit 120cc Piston Cylinder Cam Shaft Honda XR100 CRF100" is in sale since Monday, March 18, 2019. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Engines & Engine Parts\Other Engines & Engine Parts". The seller is "americanclassicmotors" and is located in Zieglerville, Pennsylvania. This item can be shipped worldwide.