1.c Norton SOHC Head and Barrel

1.c Norton SOHC Head and Barrel

Norton SOHC Head and Barrel parts, including valvegear and pistons


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SOHC, OHV and SV (all Singles) Exhaust Pipe Port Crushable Washer

Product 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

£3.30 *
In stock

500cc (SOHC) International Piston: 79.62mm (i.e 79mm + 0.024") - Slipper Type (Approx 9.5:1 CR)

Product no.: 0396 A11/160

This 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

£294.00 *
In stock
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 A11/160

This 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 

£294.00 *
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/160

This 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 

£294.00 *
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/160A

This 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

£304.50 *
In stock
can be shipped within 120 days

500cc OHV Model 18/ES2 (& CS1) Type Omega Forged Piston - (Approx 8.0:1 CR) - 80.13mm Bore

Product no.: 1062 C7/161HC

This 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.  See detail listing for more information. Price is per piston

 

£294.00 *
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 Bore

Product no.: 1061 C7/161HC

This 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.  See detail listing for more information. Price is per piston

 

£294.00 *
In stock
can be shipped within 120 days

New Norton Single : (Bronze) Little End Bush - 4 Types To fit SOHC Inter/Manx/OHV/SV Models avail

Product 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

from £21.00 *
In stock
can be shipped within 120 days

Pack of Four - Circlips for Piston Gudgeon Pin

Product no.: 0380 A2/164

These 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

£3.20 *

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 

£0.00 *
In stock
can be shipped within 120 days

Norton SOHC (and DOHC) Finned Exhaust Nut

Product no.: 0288 A11M/167

Very 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. 

£36.80 *
In stock

SOHC - Cast Iron Head Sleeve Nut Washers (Inter and CS1 Heads): Stainless Steel - Pack of 4

Product no.: 1016 E6662_125

This 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.

£22.10 *
In stock

SOHC/DOHC - Alloy Head Sleeve Nut Washers (Inter and Manx Heads): Stainless Steel - Pack of 4

Product no.: 1015 E6662

This 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.

£26.30 *
In stock

SOHC 11/32" Model 30\40 Inlet Guide

Product no.: 0301 A11/138

These 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.  

£22.50 *
In stock

SOHC 3/8" Model 30\40 Exhaust Guide

Product no.: 0303 A11/138B

These high quality valve guides are made to the original dimensions of SOHC Norton 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. 

£22.10 *
In stock

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.

£49.40 *
In stock

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".

£49.40 *
In stock

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". 

£49.40 *
In stock

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".

£49.40 *
In stock

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".

 

£49.40 *
In stock

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.

from £49.40 *
In stock

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".

£49.40 *
In stock

500cc SOHC 3/8" Stem Exhaust Valves (Sized - 4.590" Length, 1.735\750" Head)

Product no.: 0037b A11/143B

- High quality exhaust valves manufactured by G & S Valves - Following Head Sizes available (check your original) : 1.735" or 1.750". Standard Model 30\40 stem diameter : 3/8" - Stem length: 4.590".

£49.40 *
In stock

500cc SOHC 3/8" Stem Exhaust Valves (Sized - 4.650" Length, 1.735\750" Head)

Product no.: 0037c A11/143C

- High quality exhaust valves manufactured by G & S Valves - Following Head Sizes available (check your original) : 1.735" or 1.750". Standard Model 30\40 stem diameter : 3/8" - Stem length: 4.650".

£49.40 *
In stock

350cc SOHC 11/32" Stem Inlet Valves (Blank Stem) - For Model 40 (International)

Product no.: 0039a A10/142a

- High quality inlet valves manufactured by G & S Valves - Following Head Sizes available (check your original) : 1.635" - standard Model 30/40 stem diameter : 11/32" - Stem length: 4.875".

£49.40 *
In stock

350cc SOHC 11/32" Stem Inlet Valves (Sized - 4.590" Length, 1.635\655" Head)

Product no.: 0039b A10/142b

- High quality inlet valves manufactured by G & S Valves - Following Head Sizes available (check your original) : 1.635" or 1.655". Standard Model 30\40 stem diameter : 11/32" - Stem length: 4.590".

£49.40 *
In stock

350cc SOHC 3/8" Stem Exhaust Valves (Blank Stem) - For Model 40 (International)

Product no.: 0039c A10/143B

- High quality exhaust valves manufactured by G & S Valves - Head Size : 1.655". Standard Model 30/40 stem diameter : 3/8". - Stem length: 4.875".

 

£49.40 *
In stock

350cc SOHC 3/8" Stem Exhaust Valves (Sized - 4.590" Length, 1.635\655" Head)

Product no.: 0039d A10/143b

- High quality exhaust valves manufactured by G & S Valves - Following Head Sizes available (check your original) : 1.635" or 1.655". Standard Model 30\40 stem diameter : 3/8" - Stem length: 4.590".

£49.40 *

SOHC Hairpin Valve Spring Top Cup and Collet - Inlet

Product no.: 0278 A11/147I

CNC Machined top cup, to take tapered collets, to fit all SOHC engines. Note: These top cups are sold complete with a matching set of collets (pair) to fit a 11/32" inlet valve. Although these are made using the original taper, I have found many pattern collets have slight variations and do not seat properly. Therefore these top cups have been machined with exactly the same taper as the collets and are sold as a matching pair.

£19.40 *

SOHC Valve Spring Top Cup and Collet - Exhaust

Product no.: 0279 A11/147E
CNC Machined top cup, to take tapered collets, to fit all SOHC engines. Note: These top cups are sold complete with a matching set of collets (pair) to fit a 3/8" Exhaust valve. Although these are made using the original taper, I have found many pattern collets have slight variations and do not seat properly. Therefore these top cups have been machined with exactly the same taper as the collets and are sold as a matching pair.
£19.40 *
*
Recommended Retail Price, plus delivery
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