BBR Motorsports 88CC Big Bore Cylinder Piston Kit With Cam Carb Honda CRF/XR50

Designer: BBR Motorsports

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Unit Price
SKU 411-HXR-5400
Free delivery to the Lower 48 States
30 Day Returns and Exchanges
Fitmet Questions? Call us at 610-754-8500


Part # 411-HXR-5400

Convert your CRF/XR50 to an 88cc screamer with this complete kit. 

Everything is included to upgrade the performance of you mini-bike. 

This kit uses your stock CRF/XR50 cylinder head.  

   • Aluminum BBR cylinder.

• Special 52mm piston specially designed to work with your stock cylinder head's combustion chamber.

• BBR special grind camshaft take full advantage of the large piston for great performance.

• Special BBR tapered aluminum intake manifold adapts the large carb to the stock intake port size.

• 18mm carb includes extra main and pilot jets for easy tuning

• Also includes CR style throttle, cable, air filter and top end gasket kit.

Installation Note 1: Throttle unit included with kit will only work with 7/8" handlebars and will not mount to stock XR/CRF50 handlebars. Stock handlebars are 3/4".

Installation Note 2: 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 combine with the XR/CRF70 type cylinder head. 

The result is a motor that makes less horsepower than stock.