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CRF/XR50 18mm Big Carb Kit

 
420-HXR-5002
420-HXR-5002
 
420-HXR-5003
420-HXR-5003
 
420-HXR-5004
420-HXR-5004
 
 
 
 
 
 
420-HXR-5002

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CRF/XR50 18mm Big Carb Kit
Options:
QTY    $179.95
Out of stock
Any additional options and/or replacement parts will be available at the bottom of this page

CRF/XR50 18mm Big Carb Kit

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..

Choose your kit.
420-HXR-5002 (shown in photo) includes 2 intake manifolds. One for use with stock XR/CRF50 heads and a second that is for use with aftermarket big valve heads or the stock XR/CRF70 head.
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 General Jetting Guidelines Chart


Part NumberImageDescriptionPrice 
420-HXR-5002420-HXR-5002Carb Kit - BBR 18mm Stock/Big Valve Heads / XR/CRF50, 00-Present$179.95
420-HXR-5003420-HXR-5003Carb Kit - BBR 18mm Stock Heads / XR/CRF50, 00-Present$149.95
420-HXR-5004420-HXR-5004Carb Kit - BBR 18mm Big Valve Heads / XR/CRF50, 00-Present$149.95
Part NumberImageDescriptionPrice 
421-BBR-2001421-BBR-2001Carburetor Only - 18mm (80m/35p)$95.00
421-KEH-3001421-KEH-3001Jet Kit - 18mm Carb, PC18/20 (33,35,38,40,70,75,80,85,90,95)$34.95
421-KEH-9001421-KEH-9001Carburetor Repair Kit - 18mm Carb$32.95
422-HXR-5002422-HXR-5002Intake Manifold - XR/CRF50-70/PC18/Big Valve Head$42.95
422-HXR-5003422-HXR-5003Intake Manifold - XR/CRF50/PC18/Stock Head$42.95
512-BBR-1001512-BBR-1001Throttle Cable - BBR 18mm/26mm Carb Kit / XR/CRF50 / KLX/DRZ110 / Bar Kit - CRF110F / DRZ70$24.00
512-BBR-2001512-BBR-2001Throttle Assembly - BBR Carb Kits / Brake Kits$22.95
Part NumberImageDescriptionPrice 
430-HXR-5002430-HXR-5002Air Filter - UNI, 1 1/4"(32mm) X 4", Straight / 18mm Carb / XR/CRF70 Stock Carb$18.95
431-BBR-1002431-BBR-1002Air Filter - Tapered, 35mm$16.95
500-BBR-1001500-BBR-1001Grips - BBR 'CR' Style$9.95
512-BBR-3002512-BBR-3002Aluminum Throttle Tube - BBR Carb Kit / Brake Kit Throttle$42.95