CRF/XR50 18mm Big Carb Kit
CRF/XR50 18mm Big Carb Kit  
420-HXR-5002(A), Carb Kit - BBR 18mm / XR/CRF50, 00-Present
420-HXR-5002
421-KEH-3001(A), Jet Kit - 18mm Carb, PC18/20 (33,35,38,40,70,75,80,85,90,95)
421-KEH-3001
421-KEH-9001(A), Carburetor Repair Kit - 18mm Carb
421-KEH-9001
422-HXR-5003(A), Intake Manifold - XR/CRF50/PC18/Stock Head
422-HXR-5003
512-BBR-1001(A), Throttle Cable - BBR 18mm/26mm Carb Kit / XR/CRF50 / KLX/DRZ110 / Bar Kit - CRF110F / DRZ70
512-BBR-1001
512-BBR-2001(A), Throttle Assembly - BBR Carb Kits / Brake Kits
512-BBR-2001
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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..

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 Number Application Price  
420-HXR-5002Carb Kit - BBR 18mm Stock/Big Valve Heads / XR/CRF50, 00-Present179.95Please Call for Inventory Status on this Item
420-HXR-5003Carb Kit - BBR 18mm Stock Heads / XR/CRF50, 00-Present149.95Please Call for Inventory Status on this Item
420-HXR-5004Carb Kit - BBR 18mm Big Valve Heads / XR/CRF50, 00-Present149.95Please Call for Inventory Status on this Item
Replacement Parts:
421-BBR-2001Carburetor Only - 18mm (80m/35p)95.00Please Call for Inventory Status on this Item
421-KEH-3001Jet Kit - 18mm Carb, PC18/20 (33,35,38,40,70,75,80,85,90,95)34.95Please Call for Inventory Status on this Item
421-KEH-9001Carburetor Repair Kit - 18mm Carb32.95Please Call for Inventory Status on this Item
422-HXR-5002Intake Manifold - XR/CRF50-70/PC18/Big Valve Head42.95Please Call for Inventory Status on this Item
422-HXR-5003Intake Manifold - XR/CRF50/PC18/Stock Head42.95Please Call for Inventory Status on this Item
512-BBR-1001Throttle Cable - BBR 18mm/26mm Carb Kit / XR/CRF50 / KLX/DRZ110 / Bar Kit - CRF110F / DRZ7024.00Please Call for Inventory Status on this Item
512-BBR-2001Throttle Assembly - BBR Carb Kits / Brake Kits22.95Please Call for Inventory Status on this Item
Optional Parts:
430-HXR-5002Air Filter - UNI, 1 1/4"(32mm) X 4", Straight / 18mm Carb / XR/CRF70 Stock Carb18.95Please Call for Inventory Status on this Item
431-BBR-1002Air Filter - Tapered, 35mm16.95Please Call for Inventory Status on this Item
500-BBR-1001Grips - BBR 'CR' Style9.95Please Call for Inventory Status on this Item
512-BBR-3002Aluminum Throttle Tube - BBR Carb Kit / Brake Kit Throttle42.95Please Call for Inventory Status on this Item