BBR MOTORSPORTS Engine Kit - 88cc Flat Top Big Bore with Cam - XR50R/CRF50F 411-HXR-5400

Engine Kit - 88cc Flat Top Big Bore with Cam - XR50R/CRF50F
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 52 mm 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, 18 mm carb includes extra main and pilot jets for easy tuning, Also includes CR style throttle, cable, air filter and top end gasket kit, 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.