Norton SOHC Head and Barrel parts, including valvegear and pistons
SOHC, OHV and SV (all Singles) Exhaust Pipe Port Crushable WasherProduct no.: 0089 A3/166- Copper/Asbestos Type Washer used to seal exhaust pipe where it screws into cylinder head (normally requires replacement each time Union Nut is refitted). Fits all SOHC, OHV and Side Valve Norton models |
500cc (SOHC) International Piston: 79.62mm (i.e 79mm + 0.024") - Slipper Type (Approx 9.5:1 CR)Product no.: 0396 A11/160This is a 79.62mm forged slipper piston to fit 500cc Norton International and Longstroke Manx (i.e. 79mm/79.62mm x 100mm) Longstroke singles with a 1.200" wide Gudgeon Pin. Manufactured by top performance piston manufacturer - Omega Pistons, to an original SOHC Norton piston pattern. Nov 2021 Update: New batch now in stock and available can be shipped within 120 days |
500cc (SOHC) International Piston: 80.13mm (i.e 79.00mm +0.044" ) - Slipper Type (Approx 9.5:1 CR)Product no.: 0397 A11/160This is an 80.13mm (i.e 79.62mm +0.020thou) 500cc forged slipper piston to fit Norton International models with a 1.200" wide Gudgeon Pin. Manufactured by top performance piston manufacturer - Omega Pistons . Nov 2021 - New batch now in stock can be shipped within 120 days |
500cc (SOHC) M30/Manx Type Piston: 79.62mm STD - Slipper Type (Approx 9.5:1 CR)Product no.: 0398 A11M/160This is a 79.62mm (500cc) forged slipper piston to fit Norton International and Longstroke Manx 79 (and 79.62)mm x 100mm Longstroke singles fitted with the 1.00" wide (M30/Manx type) Gudgeon Pin. Manufactured by top performance piston manufacturer - Omega Pistons. Nov 2021 update: New batch now in stock can be shipped within 120 days |
500cc (SOHC) M30/Manx Piston: 79.62mm High Comp/'Alcohol Dome' - Slipper Type (Approx 12:1 CR)Product no.: 0686 A11M/160AThis is a 79.62mm (500cc) forged slipper piston to fit Norton Racing International and Longstroke Manx 79 (and 79.62)mm x 100mm Longstroke singles - this version is very high compression - meant for alchohol/methanol fuels or racing fuels and competition use only. Manufactured by top performance piston manufacturer - Omega Pistons . Now 21 Update - new batch now in stock can be shipped within 120 days |
500cc OHV Model 18/ES2 (& CS1) Type Omega Forged Piston - (Approx 8.0:1 CR) - 79.62mm BoreProduct no.: 1061 C7/161HCThis is a 79.62mm (500cc) forged slipper piston which copies the same vital dimensions as the original 1940's-50's Norton Heplex 572 OHV (Model 18 and ES2) piston, other than having a slightly raised crown - which on most OHV models should relate to an estimated @8:1 compression ratio. As with our SOHC slipper pistons - these are the highest quality forged slipper pistons made by top manufacturer Omega. They are also similar to the lower compression SOHC Inter pistons, often fitted to CS1's and road going Inters (or later Inters). See detail listing for more information before ordering. Price is per piston
can be shipped within 120 days |
500cc OHV Model 18/ES2 (& CS1) Type Omega Forged Piston - (Approx 8.0:1 CR) - 80.13mm BoreProduct no.: 1062 C7/161HCThis is a 80.13mm (500cc) forged slipper piston which copies the same vital dimensions as the original 1940's-50's Norton Heplex 572 OHV (Model 18 and ES2) piston, other than having a slightly raised crown - which on most OHV models should relate to an estimated @8:1 compression ratio. As with our SOHC slipper pistons - these are the highest quality forged slipper pistons made by top manufacturer Omega. They are also similar to the lower compression SOHC Inter pistons, often fitted to CS1's and road going Inters (or later Inters). See detail listing for more information before ordering. Price is per piston
can be shipped within 120 days |
Norton Single : (Bronze) Little End Bush - 4 Types To fit SOHC Inter/Manx/OHV/SV Models availProduct no.: 1077 A2/159(M)This is a listing for the Little End Bush to fit Norton Single Cylinder models - with 4 variation types. They are available to fit most SOHC models (road going and competition type), OHV and SV models. We also manufacture a type to allow the fitment of BSA type pistons, with 0.750" Gudgeon Pin diameter. All are manufactured in high quality Leaded Bronze to original design. See detail listing for more information on each variation. Price is Each can be shipped within 120 days |
Pack of Four - Circlips for Piston Gudgeon PinProduct no.: 0380 A2/164These are modern circlips of the same size as fitted to standard Norton pistons - i.e 0.875" gudgeon pins, incase like me you sometimes buy 'New Old Stock' pistons at autojumbles, but the circlips are missing |
350cc (SOHC) Inter Model 40 Hepolite Piston - Special Order (Approx 7.5:1 CR)Product no.: 1006 A10/160- This is a 'Special Order' listing for SOHC Model 40 350cc pistons - that we have available to special order, using modern Hepolite replacement pistons, to the same major dimensions as original 350cc 71mm in STD (or +20) bore pistons. See detail listing for more information can be shipped within 120 days |
Norton SOHC (and DOHC) Finned Exhaust NutProduct no.: 0288 A11M/167Very nice example of the Norton SOHC exhaust nut, with the correct longer thread that differentiates them from the more common ES2 type. They are almost exact copies of the original, of the type fitted to most SOHC models, including both M30\M40 International and SOHC (Gardgengate) Manx's. |
SOHC - Cast Iron Head Sleeve Nut Washers (Inter and CS1 Heads): Stainless Steel - Pack of 4Product no.: 1016 E6662_125This item is for a set of Cylinder Head Sleeve Nut Washers, of the type fitted to most SOHC cast iron cylinder heads (both International and CS1). These are CNC manufactured to fine tolerance and in stainless steel. Price is for matched set of 4. See detail listing for more information. |
SOHC/DOHC - Alloy Head Sleeve Nut Washers (Inter and Manx Heads): Stainless Steel - Pack of 4Product no.: 1015 E6662This item is for a set of Cylinder Head Sleeve Nut Washers, of the thicker type fitted to most SOHC (and pre-Featherbed DOHC) Alloy and Bi-Metal cylinder heads (both International and Manx models). These are CNC manufactured to fine tolerance and in stainless steel. Price is for matched set of 4. See detail listing for more information. |
SOHC 11/32" Model 30\40 (and 30M/40M - Manx Type) Inlet Guide - EachProduct no.: 0301 A11/138These high quality valve guides are made to the original dimensions of SOHC Norton valve guides - this being the inlet which are bored to take the standard 11/32" diameter inlet valve. |
11/32" Model 30\40 Inlet Guide - 1 Thou Oversize OD ShaftProduct no.: 0302 A11/138_OSThese high quality Oversize inlet valve guides are as per our standard SOHC valve guides (Item 0301), except these guides have an external diameter that fits into the cylinder head with an additional 1 Thou (0.001") diameter - which can help if you think you have a cylinder head which has previously had a guide move in the head, and therefore requires an additional interference fit. See detail listing for more detail. Price is Each
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SOHC 3/8" Model 30\40 (and 30M/40m Manx Type) Exhaust Guide - EachProduct no.: 0303 A11/138BThese high quality valve guides are made to the original dimensions of SOHC Norton exhaust valve guides - with the exhaust guide on SOHC engines a bigger outer diameter, bored to take a 3/8" exhaust valve (the inlet guide is 11/32". The guide includes the important oilway from the cambox feed, which has a small countersunk face to allow for a better tolerence when fitting them. Price is each. |
SOHC International (and SOHC Manx Type) Hairpin Valve Spring/Guide Bottom Collar - EachProduct no.: 0318 A11/148This is an exact reproduction of the valve guide bottom collar that held hairpin valve springs on the Norton SOHC International model, as well as original SOHC Manx heads. These are based on an original International valve collar - even including the patent number, but we have them cast in stainlesss steel so they do not rust, and are CNC machined. See detail listing for more information. Price is Each. Update May 2023: New batch now in stock |
Norton SOHC International Hairpin Valve Spring - Set of 4Product no.: 0323 A11/144Hairpin valve spring manufactured to exactly the same specification and shape as the orignal type fitted to Norton International Model 30\40 engines. Price is for a set of 4 springs - which is required for one engine |
Norton SOHC Manx Hairpin Valve Spring - Set of 4Product no.: 0324 A11/144MHairpin valve spring manufactured to exactly the same specification and shape as the orignal type fitted to Norton SOHC Manx Model 30M\40M engines. Price is for a set of 4 which is required for one engine |
SOHC Inlet Guide Lubrication Union and Pipe Set (Price is per single valve Assembly)Product no.: 0353 A11/778+9+80 - IThese are the brass union assemblies that screw into the front bevel gear chamber of the SOHC cambox and feed oil to the valve guides, via the small bore copper pipes. Similarly, they were also fitted to many pre-1938 OHV rockerbox's. This assembly is for an inlet valve assembly - as the union has a smaller oil feed hole than the exhaust assembly. Supplied as complete assembly, where pipe can be modelled to fit your engine. See detail listing for more information. Price is per assembly.
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SOHC Exhaust Guide Lubrication Union and Pipe Set (Price is per single valve Assembly)Product no.: 0354 A11/778+9+80 - EThese are the brass union assemblies that screw into the front bevel gear chamber of the SOHC cambox and feed oil to the valve guides, via the small bore copper pipes. Similarly, they were also fitted to many pre-1938 OHV rockerbox's. This assembly is for an Exhaust valve assembly - as the union has a larger oil feed hole than the inlet guide assembly. Supplied as complete assembly, where pipe can be modelled to fit your engine. See detail listing for more information. Price is per assembly. |
3/8" Stem Diameter Valve Cap (Two Thicknesses Available) - SOHC Ex and OHV Engines - EachProduct no.: 1127 VlCap01/02Hardened 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 |
11/32" Stem Diameter Valve Cap (Two Thicknesses Available) - SOHC Inlet - EachProduct no.: 1128 VlCap03/04Hardened Valve Cap to fit 11/32" 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 |
500cc SOHC 11/32" Stem Inlet Valves (Blank Length Stem) - For Model 30 (International)Product no.: 0033a A11/142A- High quality inlet valves manufactured by G & S Valves - Following Head Sizes available (check your original) : 1.750" or 1.790" diameter. Standard Model 30/40 stem diameter : 11/32". This listing is for a valve with a blank stem (no groove machined) so you can cut it to length and machine the collet groove yourself, if the valve you are replacing is not one of our standard lengths. |
500cc SOHC 11/32" Stem Inlet Valves (Sized - 4.590" Length, 1.750\790" Head)Product no.: 0033b A11/142B- High quality inlet valves manufactured by G & S Valves - Following Head Sizes available (check your original) : 1.750" or 1.790" diameter. Standard Model 30\40 stem diameter : 11/32" - Stem length: 4.590". |
500cc SOHC 11/32" Stem Inlet Valves (Sized - 4.590" Length, 1.825" Head)Product no.: 0033c A11/142C- High quality inlet valves manufactured by G & S Valves - This valve is in a larger head size - 1.825". It was sometimes fitted to later International's and SOHC Manx's (but can also be fitted to earlier engines if req'd) - standard Model 30\40 stem diameter : 11/32" - Stem length: 4.590". |
500cc SOHC 11/32" Stem Inlet Valves (Sized - 4.650" Length, 1.825" Head)Product no.: 0033d A11/142D- High quality inlet valves manufactured by G & S Valves - This valve is in a larger head size - 1.825". It was sometimes fitted to later International's and SOHC Manx's (but can also be fitted to earlier engines if req'd) - standard Model 30\40 stem diameter : 11/32" - Stem length: 4.650". |
500cc SOHC 11/32" Stem Inlet Valves (Sized - 1.855" Head, 3 length types available)Product no.: 0033e/f/g A11/142I- High quality inlet valves manufactured by G & S Valves - This valve is in a larger head size - 1.855". Probably the largest diameter head inlet valve fitted to SOHC Norton engines, this head would normally only be fitted to racing engines (I think I have one of these fitted in one of my racing methanol heads. Standard Model 30\40 stem diameter : 11/32" - Stem length: 4.650".
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500cc SOHC 5/16" Stem In/Ex Valves - 1.750" / 1.790" - 4 Variants - Late 30M SOHC/DOHC (Manx)Product no.: 0034 A11/142B- High quality inlet (or Exhaust) valves manufactured by G & S Valves for later SOHC heads fitted with 5/16" stem valves. - Following Head Sizes available (check your original) : 1.750 and 1.790". Valve stem diameter : 5/16" valves were sometime fitted to late SOHC Manx engines and early DOHC engines. |
500cc SOHC 3/8" Stem Exhaust Valves (Blank Stem) - For Model 30 (International)Product no.: 0037a A11/143A- High quality exhaust valves manufactured by G & S Valves. - Following Head Sizes available (check your original) : 1.735" and 1.750". Standard Model 30/40 stem diameter : 3/8". Stem length: 4.875". |
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