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Perfect add-on for our Big Bore kits and exhaust systems. Increase power throughout the RPM range utilizing 18mm carburetor. Includes all required hardware for easy installation right down to a jet assortment for fine tuning.. These carb kit will also work great on a 1988-1999 Honda Z50R using 7/8" handlebars.Choose your kit.420-HXR-5003 includes just the manifold for use with stock XR/CRF50 heads.420-HXR-5004 includes just the manifold for use with aftermarket big valve heads or the stock XR/CRF70 head.
18mm Carb
Special manifold sized for the CRF/XR50 head
Special manifold sized for the big valve heads (XR70 and aftermarket)
Includes gaskets and bolts
Includes throttle and cable
Includes 5 main jets and 3 pilot jets
Application Note: This 18mm Carb Kit is not recommended for use on stock displacement CRF50's. Recommended for 82cc or larger displacement motors. Note: The throttle in this kit is for standard 7/8" diameter handlebars. The stock Honda XR/CRF50 uses 3/4" diameter handlebars. You must use a handlebar kit that changes to 7/8" diameter handlebars to use this throttle. BBR does not make or sell any throttles for 3/4" handlebarsNote #2: This kit does not include an air filter and will not work with the OEM Honda CRF/XR50 air filter. See the UNI filter we recommend (BBR part number 430-HXR-5002) below in the Optional Parts section.BBR General Jetting Guidelines Chart
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