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 inlet valve is suitable fitment for most pre-unit and early unit- construction Triumph 650 models from 1954-1965. Also, suitable fitment for 1966 6T and early production TR6 models. Be sure to check the factory parts catalog to verify fitment, as there were running production changes to the Triumph B-range engines during the early unit-construction era.
The V137 replacement inlet valves from G&S are manufactured from high-grade stainless steel to original specifications and have a head diameter of 1.500″, stem diameter of .310″, with an overall length of 3.790″. Made in the UK.
Inlet valves allow the ingress of the fuel/air charge to 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.
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