XR / CRF50 88cc Big Bore Kit W/Cam - BBR
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    Available at 26B O'Sullivan Street, Pakenham VIC 3810

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XR / CRF50 88cc Big Bore Kit W/Cam - BBR

411-HXR-5500
In stock
$399.95
$399.95

XR / CRF50 88cc Big Bore Kit W/Cam - BBR

XR / CRF50 88cc Big Bore Kit W/Cam - BBR

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.

Also fits 1988-1999 Z50R with short piston.


  • 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. This is the correct BBR bore kit for the XR/CRF70.


BBR General Jetting Guidelines Chart

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