1.c Norton SOHC Head and Barrel

1.c Norton SOHC Head and Barrel

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

Display per page
Sort by
1 - 45 of 56 results

500cc SOHC 11/32" Stem Inlet Valves (Blank Stem) - For Model 30 (International)

Product no.: 0033a A11/142A
- Highest quality inlet valves manufactured by G & S Valves - Following Head Sizes available (check your original) : 1.750" or 1.790" - standard Model 30/40 stem diameter : 11/32" - Stem length: 4.875", left blank at end, so these can be cut to the same length as your original, and then the collet groove machined afterwards. This is the best way to ensure that you will have a valve the correct length for your cambox and spacing between cambox and head, particularly important if you are replacing a valve with a more obscure length. This type requires you undertake the final cutting to length yourself. If you wish us to cut the valve to length and machine the collet groove, please email seperately with order - expect £11 charge per valve, and turnaround time of at least 3 weeks.
£44.00 *

500cc SOHC 11/32" Stem Inlet Valves (Sized - 4.590" Length, 1.750\790" Head)

Product no.: 0033b A11/142B
- Highest quality inlet valves manufactured by G & S Valves - Following Head Sizes available (check your original) : 1.750" or 1.790" (please state which head size when ordering) - standard Model 30\40 stem diameter : 11/32" - Stem length: 4.590", these valves already have the collet groove machined and are ready to fit. Note: Norton cammy valves were made in a variety of lengths over the years, however, this length - 4.590" is one of the most commonly used. If you have an original then measure that. If you are unsure please email me
£46.00 *

500cc SOHC 11/32" Stem Inlet Valves (Sized - 4.590" Length, 1.825" Head)

Product no.: 0033c A11/142C
- Highest 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", these valves already have the collet groove machined and are ready to fit. Note: Norton cammy valves were made in a variety of lengths over the years, however, this length - 4.590" is one of the most commonly used. If you have an original then measure that. If you are unsure please email me
£46.00 *

500cc SOHC 11/32" Stem Inlet Valves (Sized - 4.650" Length, 1.825" Head)

Product no.: 0033d A11/142D
- Highest 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", these valves already have the collet groove machined and are ready to fit. Note: Norton cammy valves were made in a variety of lengths over the years. Thiis length - 4.650" is also relatively common (and I believe more so with the larger valve size). If you have an original then measure that. If you are unsure please email me
£46.00 *

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

Product no.: 0033e A11/142E
- Highest 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", these valves already have the collet groove machined and are ready to fit. Note: Norton cammy valves were made in a variety of lengths over the years. Thiis length - 4.650" is also relatively common (and I believe more so with the larger valve size). If you have an original then measure that. If you are unsure please email me
£46.00 *

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

Product no.: 0034 A11/142B

- High quality inlet valves manufactured by G & S Valves. - Following Head Sizes available (check your original) : 1.790". - Model 30M stem diameter : 5/16" valves were sometime fitted to late SOHC Manx engines and early DOHC engines. - Stem length: 4.875", left blank at end, so these can be cut to the same length as your original, and then the collet groove machined afterwards. This is the best way to ensure that you will have a valve the correct length for your cambox and spacing between cambox and head, particularly important if you are replacing a valve with a more obscure length. This type requires you undertake the final cutting to length yourself. If you wish us to cut the valve to length and machine the collet groove, please email seperately with order - expect £11 charge per valve, and turnaround time of at least 3 weeks. 09/09/12 - Note: 5/16" Valves currently out of stock. Email for details

£44.00 *

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

Product no.: 0035 A11M/142C
- High quality inlet valves manufactured by G & S Valves - Dimensions: 1.906" Head Size (approx 1 29/32") x 5/16" stem diameter, as used on late Gardengate Manx heads - Stem length: 4.900", left blank at end, so can be finished to your engine (standard practice for these engines) - CURRENTLY OUT OF STOCK - Contact me if you require these I may be considering re-ordering
£0.00 *

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

Product no.: 0036 A11M/142D
- 5/16" stem Inlet valve, but with stem machined to size, to fit late 30's-40's 'Square' type head - Dimensions: 1.906" Head Size (approx 1 29/32") x 5/16" stem diameter, as used on late Gardengate Manx heads - Stem length: 4.530", collet grooves finish machined. - CURRENTLY OUT OF STOCK - Contact me if you require these I may be considering re-ordering
£0.00 *

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" (state which when ordering). - standard Model 30/40 stem diameter : 3/8". - Stem length: 4.875", left blank at end, so these can be cut to the same length as your original, and then the collet groove machined afterwards. This is the best way to ensure that you will have a valve the correct length for your cambox and spacing between cambox and head, particularly important if you are replacing a valve with a more obscure length. This type requires you undertake the final cutting to length yourself. If you wish us to cut the valve to length and machine the collet groove, please email seperately with order - expect £11 charge per valve, and turnaround time of at least 3 weeks.
£44.00 *

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

Product no.: 0037b A11/143B
- Highest quality exhaust valves manufactured by G & S Valves. - Following Head Sizes available (check your original) : 1.735" or 1.750" (please state which head size when ordering). - standard Model 30\40 stem diameter : 3/8" - Stem length: 4.590", these valves already have the collet groove machined and are ready to fit. Note: Norton cammy valves were made in a variety of lengths over the years, however, this length - 4.590" is one of the most commonly used. If you have an original then measure that. If you are unsure please email me
£46.00 *

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

Product no.: 0037c A11/143C
- Highest quality exhaust valves manufactured by G & S Valves. - Following Head Sizes available (check your original) : 1.735" or 1.750" (please state which head size when ordering). - standard Model 30\40 stem diameter : 3/8" - Stem length: 4.650", these valves already have the collet groove machined and are ready to fit. Note: Norton cammy valves were made in a variety of lengths over the years, although not the most common, this length - 4.650" was sometimes used, particularly with larger inlet valve heads. If you have an original then measure that. If you are unsure please email me
£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", left blank at end, so can be finished to your engine (standard practice for these engines) - CURRENTLY OUT OF STOCK - Contact me if you require these I may be considering re-ordering
£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. I advise you check your own valve size to ensure this is correct. - CURRENTLY OUT OF STOCK - Contact me if you require these I may be considering re-ordering
£0.00 *

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

Product no.: 0039a A10/142a
- Highest 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", left blank at end, so these can be cut to the same length as your original, and then the collet groove machined afterwards. This is the best way to ensure that you will have a valve the correct length for your cambox and spacing between cambox and head, particularly important if you are replacing a valve with a more obscure length. This type requires you undertake the final cutting to length yourself. If you wish us to cut the valve to length and machine the collet groove, please email seperately with order - expect £11 charge per valve, and turnaround time of at least 3 weeks.
£44.00 *

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

Product no.: 0039b A10/142b
- Highest quality inlet valves manufactured by G & S Valves - Following Head Sizes available (check your original) : 1.635" or 1.655" (please state which head size when ordering) - standard Model 30\40 stem diameter : 11/32" - Stem length: 4.590", these valves already have the collet groove machined and are ready to fit. Note: Norton cammy valves were made in a variety of lengths over the years, however, this length - 4.590" is one of the most commonly used. If you have an original then measure that. If you are unsure please email me
£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. - Following Head Sizes available (check your original) : 1.655" (state which when ordering). - standard Model 30/40 stem diameter : 3/8". - Stem length: 4.875", left blank at end, so these can be cut to the same length as your original, and then the collet groove machined afterwards. This is the best way to ensure that you will have a valve the correct length for your cambox and spacing between cambox and head, particularly important if you are replacing a valve with a more obscure length. This type requires you undertake the final cutting to length yourself. If you wish us to cut the valve to length and machine the collet groove, please email seperately with order - expect £11 charge per valve, and turnaround time of at least 3 weeks.
£44.00 *

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

Product no.: 0039d A10/143b
- Highest quality exhaust valves manufactured by G & S Valves. - Following Head Sizes available (check your original) : 1.635" or 1.655" (please state which head size when ordering). - standard Model 30\40 stem diameter : 3/8" - Stem length: 4.590", these valves already have the collet groove machined and are ready to fit. Note: Norton cammy valves were made in a variety of lengths over the years, however, this length - 4.590" is one of the most commonly used. If you have an original then measure that. If you are unsure please email me
£46.00 *

SOHC 11/32 Inlet Valve Collets - For Model 30/30M

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

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

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 Sleeve Nuts (Head Bolts) For Model 30/30M - Set of 4

Product no.: 0042 A11/156S
- High quality Stainless Steel head bolts for all 500cc Inter and SOHC Manx engines - Set of 4 sleevebolts, slightly cheaper than buying individually
£58.00 *

SOHC Sleeve Nuts (Head Bolts) For Model 30/30M

Product no.: 0043 A11/156
- High quality Stainless Steel head bolts for all 500cc Inter and SOHC Manx engines
£15.00 *

SOHC Rocker Box Bolt - Long (front)

Product no.: 0044 A11/108(L)
- High quality Stainless Steel cambox through bolts. Screw into Sleeve Nuts - Fits all SOHC models
£8.50 *

SOHC Rocker Box Bolt - Short (rear)

Product no.: 0045 A11/108(S)
- High quality Stainless Steel cambox through bolts. Screw into Sleeve Nuts - Fits all SOHC models
£6.50 *

SOHC Rocker Box Bolt - Set of 4

Product no.: 0046 A11/108(S&L)
- Set of 4 cambox bolts, both long and short - High quality Stainless Steel
£29.00 *

SOHC Sleeve Bolts And Cambox Bolts - Complete Set

Product no.: 0047 CT002
- Complete set of Sleeve Nuts and cambox bolts, as described above - High quality Stainless Steel
£86.00 *

SOHC Model 40/40M 350cc Crankcase Cylinder Stud Set

Product no.: 0048 A10/2 set
- High Tensile Stainless Steel Cylinder Stud Set for 350cc engines (Set of 4). Note, sometimes 350cc engines are fitted with 500cc studs and different sleeves. Please email for length details if you are unsure which to order
£39.00 *

SOHC Model 30/30M 500cc Crankcase Cylinder Stud

Product no.: 0049 A11/2

- High Tensile Stainless Steel Cylinder Stud for 500cc engine. - Beautiful quality and lightly polished - Note : These are also a replacement for many Model 40 350cc studs - contact me if you require 350cc size to confirm length

£11.00 *

SOHC Model 30/30M 500cc Crankcase Cylinder Stud Set

Product no.: 0050 A11/2 set
- High Tensile Stainless Steel Cylinder Stud Set for 500cc (and some 350cc) engines (set of 4).
£42.00 *

SOHC Model 596/15M 600cc Crankcase Cylinder Stud Set

Product no.: 0051 A15/2 set
- High Tensile Stainless Steel Cylinder Stud Set for 600cc engines (set of 4). The pattern for these was taken from a postwar (1949) Manx 600 engine, but they should also fit the pre-war 596 engines. Footnote: you might not recognize the 'A15' designate, but '15' was the model number allocated to 600 OHC machines . . . it is not listed in any catalogs though!
£44.00 *

SOHC and ES2 Exhaust Pipe Flange Washer

Product no.: 0089 A3/166
- Copper Washer used to seal exhaust pipe where it screws into cylinder head (normally requires replacement each time Union Nut is refitted). Fits both SOHC and pushrod models
£2.80 *

500cc SOHC/ES2 Paper Base Gasket

Product no.: 0274 A11/157
Paper gasket to fit on the base of 500cc barrels. (You will need to check the oil holes line up correctly - as these can vary slightly by year)
£2.00 *

500cc Norton International/SOHC Manx Compression Plate - 0.046"

Product no.: 0275 CompP/01
£3.50 *
Old price £3.50

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.
£17.50 *

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.
£17.50 *

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.
£17.50 *

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 *

Norton SOHC (and DOHC) 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

Norton International 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 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

£55.00 *

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

£55.00 *

SOHC Inlet Guide Lubrication Union and Pipe Set

Product no.: 0353 A11/778+9+80 - I
These are the brass unions 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. The unions are just as per originals (originals were used as patterns), and this means they are 'sided' with the inlet union having a smaller bore than the exhaust union. The copper pipe is supplied soldered into the nipples (and the nipples only bored after this operation is completed, and full bore checked for throughput - as this soldering process often blocks pipe) and is also slightly longer than required, so it can be gently bent and cut to length to suit the engine. They are sold as a complete set per valve, therefore two (2) sets are required per engine. This description is for an Inlet Valve Guide Set
£20.00 *

SOHC Exhaust Guide Lubrication Union and Pipe Set

Product no.: 0354 A11/778+9+80 - E
These are the brass unions 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. The unions are just as per originals (originals were used as patterns), and this means they are 'sided' with the inlet union having a smaller bore than the exhaust union. The copper pipe is supplied soldered into the nipples (and the nipples only bored after this operation is completed, and full bore checked for throughput - as this soldering process often blocks pipe) and is also slightly longer than required, so it can be gently bent and cut to length to suit the engine. They are sold as a complete set per valve, therefore two (2) sets are required per engine. This item is for an Exhaust Valve Guide set
£20.00 *
*
Recommended Retail Price, plus delivery
1 - 45 of 56 results