1.c Norton SOHC Head and Barrel

1.c Norton SOHC Head and Barrel
Norton SOHC Head and Barrel parts, including valvegear

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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

£3.10 *
In stock

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. They are supplied dull plated. To my knowledge they have not been available for many years, and I have just fitted one to the International engine I am building!
£30.00 *

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.  

£20.00 *
In stock

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. 

£20.00 *
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.

£44.00 *

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".

£46.00 *

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". 

£46.00 *

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".

£46.00 *

500cc SOHC 11/32" Stem Inlet Valves (Sized - 4.650" Length, 1.855" Head)

Product no.: 0033e A11/142E

- 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".

 

£46.00 *
Not in stock

500cc SOHC 5/16" Stem Inlet Valves - 1.750" and 1.790" (Sized/Blank Stem) - For Late 30M (SOHC Manx)

Product no.: 0034 A11/142B

- High quality inlet valves manufactured by G & S 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".

£44.00 *

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".

£46.00 *

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".

£46.00 *

500cc SOHC 5/16" Stem Exhaust Valves (Blank Stem) - For Model 30/ 30M

Product no.: 0038a A11/143B

- High quality exhaust valves manufactured by G & S Valves - Dimensions: 1.750" Head Size (1 3/4") x 5/16" stem diameter - Stem length: 4.900".

£0.00 *

500cc SOHC 5/16" Stem Exhaust Valves (Sized) - For Model 30/30M

Product no.: 0038b A11/143C

- 5/16" Stem Exhaust Valve - but machined to size, to fit late 30's-40's 'Square' type head - Dimensions: 1.750" Head Size (1 3/4") x 5/16" stem diameter - Stem length: 4.530", collet grooves finish machined.

£0.00 *

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".

£44.00 *

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".

£46.00 *

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".

 

£44.00 *

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".

£46.00 *

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.

£18.50 *

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.
£18.50 *

SOHC Valve Spring Top Cup and Collet - Manx

Product no.: 0280 A11/147M
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 5/16 Manx Inlet or 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.
£18.50 *

SOHC Valve Spring Top Cup Plate

Product no.: 0284 A11/725
CNC Machined top cup plate, with distinctive ears, which retain the hairpin valve springs. These valve spring retainers fit all top cup plates (sold seperately) and are milled from solid. Unlike the originals (which were made from flimsy pressed steel and wear badly - with obvious consequences), these items are machined from solid EN24T and are extremely tough and hardwearing. However, these have proven very difficult to make with many machining operations and occasional broken tools (we hate doing them!), which is reflected in the fact they are not cheap - but they are nice. 15/12/12: Now back in stock, and we have managed to keep the price the same as before!
£22.00 *

SOHC 11/32 Inlet Valve Collets - For Model 30/30M - Pair (to fit one valve)

Product no.: 0040 A11/150
- Valve collets to fit 11/32" diameter valves (as shown above) - collets come as a matched pair. - They come still joined, so they cannot be mistakenly mixed. When you receive them, just break them apart with a screwdriver and carefully file the small section that joined them.
£8.00 *

SOHC 5/16 Valve Collets - For SOHC/DOHC Manx - Pair (to fit one valve)

Product no.: 0040b A11/150M
- Valve collets to fit 5/16" diameter valves (as shown above), as fitted to late SOHC and early DOHC Manx Nortons - collets come as a matched pair, state which diameter required
£8.00 *

SOHC 3/8 Exhaust Valve Collets - For Model 30/30M - Pair (to fit one valve)

Product no.: 0041 A11/151
- Valve collets to fit 3/8" diameter valves (as shown above) - collets come as a matched pair, state which diameter required
£8.00 *

SOHC International Type Hairpin Valve Guide Bottom Collar

Product no.: 0318 A11/148

This is an identical reproduction of the valve guide bottom collar used on the inlet valve of Norton Internationals, and is used to hold the hairpin valve springs. 

£29.00 *

Norton SOHC International Hairpin Valve Spring - Set of 4

Product no.: 0323 A11/144

Hairpin valve spring manufactured to exactly the same specification and shape as the orignal type fitted to Norton International Model 30\40 engines. These are manufactured by a well known and reputable spring maker, who has made similar hairpin valve springs for other engine types. A set of original (new old stock) Terry's International valve springs was used to provide the pattern. Photo shows new springs below and original spring at the top. Price is for a set of 4 springs - which is required for one engine

£56.00 *
In stock

Norton SOHC Manx Hairpin Valve Spring - Set of 4

Product no.: 0324 A11/144M

Hairpin valve spring manufactured to exactly the same specification and shape as the orignal type fitted to Norton SOHC Manx Model 30M\40M engines. These are manufactured by a well known and reputable spring maker, who has made similar hairpin valve springs for other engine types. This type which were often seen fitted to early Manx engines are exactly the same as the Norton International type, other than they have a slightly smaller eye diameter. However, in all other respects they are identical to the Norton International types. I am not entirely sure why this second type of spring was used, and have talked to Stu Rogers about it, who cannot shed any light on it either. We can only assume that the slightly smaller eye meant fractionally less metal, and therefore a fractionally less amount of reciprocating weight - although the saving must have been minimal! I do not see any reason why either type could be used with either engine variation - the choice is up to you! Photo shows new springs below and original spring at the top. Price is for a set of 4 which is required for one engine

£56.00 *
In stock

Norton SOHC/DOHC Hairpin Valve Spring Tongues - Original Norton Pattern

Product no.: 0877 HairTong1

These are heavyweight UK manufactured hairpin valve spring tongues, an essential for fitting hairpin valve springs to both SOHC and DOHC Norton singles fitted with hairpin valve spring heads.  These are handmade by a UK blacksmith to the original Norton pattern

£150.00 *
In stock
*
Recommended Retail Price, plus delivery
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