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Bore Kit - 88cc W/Cam / XR/CRF50, 00-Present

 
411-HXR-5500
411-HXR-5500
 
411-HXR-5102
411-HXR-5102
 
411-HXR-5210
411-HXR-5210
 
 
 
411-HXR-5500

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Bore Kit - 88cc W/Cam / XR/CRF50, 00-Present
QTY    $219.95
Out of stock
Any additional options and/or replacement parts will be available at the bottom of this page

Bore Kit - 88cc W/Cam / XR/CRF50, 00-Present

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 NumberImageDescriptionPrice 
411-HXR-5500411-HXR-5500Bore Kit - 88cc W/Cam / XR/CRF50, 00-Present$219.95
Part NumberImageDescriptionPrice 
411-HXR-5102411-HXR-5102Camshaft - High Performance, Stock Head / XR/CRF50$99.95
411-HXR-5210411-HXR-5210Gasket Kit - 88cc S/P-FTP Kit / XR/CRF50/70$19.95
411-HXR-5212411-HXR-5212Ring Set - 88cc/106cc S/P-FTP Kit / XR/CRF50/70$32.00
411-HXR-5250411-HXR-5250Cylinder - BBR Aluminum, 52mm / XR/CRF50$155.00
411-HXR-5411411-HXR-5411Piston Kit - 88cc FTP Bore Kit / XR/CRF50$98.00