Cylinder head complete with valves (long 69.5mm) without SLS

Make repairing your scooter easier with our complete cylinder head for the 50cc 139QMB/QMA engine. Unlike many other cylinder heads on the market, this product is supplied complete, including pre-assembled valves, valve springs and valve stem seals. This means the cylinder head is ready to install and you save yourself the hassle of replacing and grinding the valves and the use of special tools.

Before making your purchase, please check the length of your valves. Our valves are the long version at 69.5mm, compare this with your current fitment as there is also a short version at 64mm. Also note that this cylinder head is supplied without a secondary air system [SLS], which can easily be deactivated. If your vehicle has an SLS system (identifiable by a hole on the top), please take this into account.

Please note that the rocker arm bridge and camshaft are not included in the delivery. Delivery is as shown. With our complete cylinder head you ensure the efficiency and performance of your engine and simplify the repair process considerably.