Worldwide Distributor of Motorcycle Valves, known as ‘Nucleus Sport’

These are being marketed as ‘Nucleus Sport’ valves to compliment our range of hi-flow, hi-performance ‘Nucleus Sports Elite’ products.

A British product made from the highest quality British forged materials, in Britain

History in the Making

The production of Nucleus Sport motorcycle valves benefits from a combined experience of more than 100 years at the top end of motor sports and motorcycle industry. G&S Valves Ltd was founded in 1946 in Surrey, England and has been producing ranges of valves for competition engines, racing cars, as well as the British motor cycle industry, from the early 60s. During this time, they earned a reputation as a high quality engine valve manufacturer, supplying the likes of:

Ford Competition Department-F1 Teams-Le Mans-Cosworth-Racing Lotus-Indy Car-The TT.

The World Super Sport 600 Class-Club Level Championship Races, and the new breed of high powered racing engines that rev in excess of 17,000 rpm.

G&S have been CHS’s manufacturer of choice since 1976 producing our unique designs to the highest standards and have received approved supplier status from many of the major OEM and high performance manufacturers, such as Cosworth ‘Approved Supplier Scheme’ and Rolls Royce Motor Cars ‘Supplier Assessments’. Together, we have produced many victories for our demanding clients and restored many rare engines to a better than new finish.

Cylinder Head Shop is  G&S’s preferred supplier and manufacturer for their valves.

These are normally known as the ‘V’ Range of valves, which were sold in the 1960’s By Alpha.
They are superior to those valves back then but are made to OE design.
If you want that ‘MADE IN ENGLAND’ luxury for your Classic, here it is.

In 1980, G&S purchased its own forge, based in the West Midlands, allowing it to manufacture purpose made forgings and over the years. Due to the increasing complexity of some of the shapes required by its racing customers, G&S Valves then purchased a number of CNC lathes, grinders and CAD systems to produce these advanced designs.

Unlike most companies which outsource to Asia or elsewhere,
we now offer a complete product range of valve and guides
made from start to finish in
Great Britain.

Click to play, Nucleus valve production at the G&S forge.

Various treatments are available to enhance the life and performance of your valves. Whilst others manufacturers use Hard Chrome or Tufftride their valves, G&S uses ‘Pulsed Plasma Nitriding’ treatments.