G&S Valves Ltd has been serving the automotive and motorcycle industries since 1946, earning the reputation of one of the highest-quality valve manufacturers worldwide. This exhaust valve is suitable fitment for Norton Commando 750 and P11 models from 1968-1972. May also be compatible with AJS and Matchless 750 twin-cylinder models from the late 1960s, as well as the 850 Commando models through 1975. Be sure to check the factory parts catalog to verify fitment.
The V264 replacement exhaust valves from G&S are manufactured from high-grade stainless steel to original specifications and have a head diameter of 1.302″, stem diameter of .3115″, with an overall length of 4.020″. Made in the UK.
Exhaust valves allow the expulsion of the combustion gases from the combustion chamber when opened. It’s critical the valve seats and valve faces make a seal when the valves are closed to maximize compression. The valve stems must have the correct clearance within the valve guides to be properly lubricated and dissipate heat.
The cylinder head must be removed from the engine to access the valvetrain. A valve spring compressor is employed to compress the springs far enough to remove the retaining collets from the top collars. Once fitted into the valve guides, the replacement valves will require “lapping-in” to the valve seats. Refer to the factory workshop manual for the complete instructions. Replacing valves is a multi-step procedure and may be best done by a professional machinist.
The product images shown are for illustrative purposes only and may not be an exact representation of the product received. Manufacturers occasionally make minor cosmetic changes to items, such as color, finish, label, or design. These changes do not impact the item’s function or compatibility. Please contact us if you have specific concerns regarding appearance.
