Location:  http://bbrmotorsports.com/Products/ProductGenerator.aspx?Prod=411-HXR-5500

Bore Kit - 88cc W/Cam / XR/CRF50, 00-Present
Bore Kit - 88cc W/Cam / XR/CRF50, 00-Present  
411-HXR-5500(A), Bore Kit - 88cc W/Cam / XR/CRF50, 00-Present
411-HXR-5500
411-HXR-5102(A), Camshaft - High Performance, Stock Head / XR/CRF50
411-HXR-5102
411-HXR-5210(A), Gasket Kit - 88cc S/P-FTP Kit / XR/CRF50/70
411-HXR-5210
411-HXR-5212(A), Ring Set - 88cc/106cc S/P-FTP Kit / XR/CRF50/70
411-HXR-5212
411-HXR-5250(A), Cylinder - BBR Aluminum, 52mm / XR/CRF50
411-HXR-5250
411-HXR-5411(A), Piston Kit - 88cc FTP Bore Kit / XR/CRF50
411-HXR-5411


Impressive Power. Engineered and developed by BBR. This cylinder retains skid plate mounts and includes: BBR aluminum cylinder, piston kit, exclusive BBR motocross-grind camshaft and gasket kit. Easy bolt-on instructions included. The most reliable kit available. Runs great with stock carb or bolt on BBR's 18mm carb kit.  
   
    • Cylinder retains skid plate mounts
• BBR aluminum cylinder
• 52mm piston specially designed to work with your stock cylinder head's combustion chamber.
• MX-grind camshaft
• Gasket kit
• Easy bolt-on instructions included
 
     
  Installation Note: This kit will not work with the Honda XR/CRF70 or other big port cylinder heads. It is designed for the tiny combustion chamber of the OEM Honda XR/CRF50 cylinder head. The flat top piston dome will result in an extremely low compression ratio when combined with the XR/CRF70 type cylinder head. The result is a motor that makes less horsepower than stock. BBR Does not currently make a big bore kit for the XR/CRF70.


BBR General Jetting Guidelines Chart
 

Part Number Application Price  
411-HXR-5500Bore Kit - 88cc W/Cam / XR/CRF50, 00-Present219.95Please Call for Inventory Status on this Item
Replacement Parts:
411-HXR-5102Camshaft - High Performance, Stock Head / XR/CRF5099.95Please Call for Inventory Status on this Item
411-HXR-5210Gasket Kit - 88cc S/P-FTP Kit / XR/CRF50/7019.95Please Call for Inventory Status on this Item
411-HXR-5212Ring Set - 88cc/106cc S/P-FTP Kit / XR/CRF50/7032.00Please Call for Inventory Status on this Item
411-HXR-5250Cylinder - BBR Aluminum, 52mm / XR/CRF50155.00Please Call for Inventory Status on this Item
411-HXR-5411Piston Kit - 88cc FTP Bore Kit / XR/CRF5098.00Please Call for Inventory Status on this Item
Optional Parts:
205-HXR-5031Exhaust System - D2, Silver / XR/CRF50, 00-Present (D*) Blowout Sale $149.95269.95Please Call for Inventory Status on this Item
410-HXR-5005Clutch Springs - HD / XR/CRF50, 00-Present26.95Please Call for Inventory Status on this Item
420-HXR-5002Carb Kit - BBR 18mm Stock/Big Valve Heads / XR/CRF50, 00-Present179.95Please Call for Inventory Status on this Item