1.q Norton 1920's and Earlier 1930's Models - All Parts/All Models

High quality (UK manufactured) coil valve springs to fit the first Norton OHV models manufactured 1924 - circa 1929, and also the first Walter Moore CS1 models 1927 - circa 1928.  These models identifiable by having a smaller and more deeply conical type top spring cup than the type that followed in 1929.  See detail listing for more information.  Price is for a set of 4 springs (i.e. enough for one engine)

This item is for a pair of the distinctive 'conical' shaped valve spring cups, of the type that were fitted on OHV and Walter Moore CS1 Norton engines through from approximately 1928 up to 1931.  CNC machined from an original pattern, including radial holes - these are designed to fit the early spring type (which we can also supply).  Sold as matching top and bottom cup - see listing for more information  

High quality (UK manufactured) coil valve springs to fit 1920's OHV models up to 1933, early (Walter Moore) type CS1 models and the first Arthur Carrol SOHC CS1 engines up to 1932/33 - see detail listing for more information and if your machine requires this type of spring.  Price is for a set of 4 springs (i.e. enough for one engine)

High quality (UK manufactured) coil valve springs to fit the late 1920's - 1936/7 Norton CS1 and OHV single cylinder models (longer length than later coil springs -see detail listing for more information.  Price is for a set of 4 springs (i.e. enough for one engine)

Hardened Valve Cap to fit 3/8" Stem Diameter valves.  These have been CNC machined using original period 'Terry' valve caps as the pattern.  These are available in two thicknesses - state thickness when ordering.  See detail listing for more information. Price is per valve cap 

This item is for a spare spring - of the type that were fitted into the distinctive 'Clack Valve' breathers in 1920's OHV and Walter Moore CS1 breathers - an original dismantled clack valve (shown in photo) providing the spring pattern.  We will shortly be manufacturing the complete breather/clack valve unit.  See listing for more information.  Price is per spring

These Cylinder Head nuts are perfect copies of the design used by Norton's on 16H and Big4 Side Valve models, from the 1930's through to the end of Side Valve production in approximately 1957 - they have a distinctive deep hex and a gradual curve to the top of the nut - which was a Norton feature on many of their engine bolts. Price is per nut.

These Cylinder Head studs are of the type fitted to pre-war WD16H and Big4 Side Valve engines through to 1947 - an original 1937 WD16H cylinder head stud being used as a pattern. See listing for more information.  Price is per stud

These Cylinder Head studs are of the type fitted to 16H and Big4 Side Valve engines from 1948 through to 1957 - an original Post War WD16H cylinder head stud being used as a pattern. See listing for more information.  Price is per stud

This listing offers a small selection of 18mm Spark Plugs suitable for those older models fitted with an 18mm Spark Plug thread in their cylinder head i.e. Norton 1920's models, WD 16H models and Douglas 2 3/4hp models.  Please read the detail listing carefully - as some 'Long Reach' types are no longer available, and alternatives are also listed.  This is a multiple listing item, also offering original type 'crushable copper' washers for both 14mm and 18mm spark plugs.