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BBR Motorsports celebrates one of the best selling dirt bikes of all time with this high-compression 120cc big bore engine kit for the XR/CRF 100. Increased displacement, higher compression and large cooling fins enhance the performance and longevity of the motor. This kit includes BBR large fin aluminum cylinder, piston, rings, pin, clips head and base gasket. All ready to go and bolts on with no case boring required. Fits ALL model year XR and CRF100's. From 1981-Present year.
BBR General Jetting Guidelines Chart
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