1.d Norton SOHC Cambox

1.d Norton SOHC Cambox

1.d Norton SOHC Cambox
Norton SOHC Cambox and Rocker parts

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SOHC Manx Cambox Magnesium Front Cover

Product no.: 0431 A11M/781
This is the distincive magnesium cambox cover fitted to racing SOHC camobox's, which allow for the central oil feed to the camshaft. These were fitted to the racing (magnesium) cambox's used on competition Inter's and Manx's from the early 1930's through to the introduction of the DOHC. This type of cover were also often fitted to the later (Featherbed) Inter models. As always with the castings I have made - I have had patterns made using an original Norton casting to copy from, and as you can see from the photograph, they are virtually indistinguishable from an original. These castings are cast in high quality magnesium alloy and come fully chromated (and as you can see from the photographs, sprayed in Duck Oil to protect them from corrosion in storage), and if you are intending to fit our cambox oil feed jet boss, I can also fit this for you before sending out - as per the top photograph. This listing is for the bare casting, but all other parts required for the central oil quill feed are also available in this section
£120.00 *

Mainshaft/Camshaft Bearing - Securing Plate Screw: All SOHC Models - Set of 3

Product no.: 0023 A11/35/3
- Countersunk screw used to retain securing plates for both main bearings in the crankcases and front camshaft bearings. These are the screws that are soldered over their heads once fitted, to ensure they dont work loose. Rather than trying to clean up th
£1.50 *

Cambox Bearing - Camshaft Front Ball Bearing : All SOHC Models

Product no.: 0026 A11/785
- Single row ball bearing. Fitted to all SOHC engines, both International and early Manx. 12/6/12: Now back in stock
£31.00 *

Cambox Bearing - Camshaft Back Roller Bearing : Model 30/40

Product no.: 0027 A11/786

- Single row caged roller bearing. Fitted to Model 30/40 (International) SOHC engines. These are either RHP or Hoffman (Hoffman became RHP) - both best quality and in correct and very difficult to find C3 fit. 

 

£71.00 *

Cambox Bearing - Camshaft Back Roller Bearing : Model 30M/40M (Manx)

Product no.: 0028 A11/786M

Cambox Bearing - Camshaft Back Roller Bearing : as fitted to the Model 30M/40M (Manx) cambox backplate - identifiable from the standard International type, in that the Manx backplate is in magnesium. These are correct RHP versions in correct C3 fit - now very rare

£68.00 *
In stock

SOHC All Models : Camshaft Bearing Retaining Plate

Product no.: 0050 A11/787
- This is the plate that stops the camshaft bearing from rotating and coming adrift in the main cambox casting
£6.00 *

SOHC Model 30M 500cc (Longstroke SOHC Manx type) Inlet and Exhaust Cam - Modified Profile

Product no.: 0051 CAM001

- Inlet and Exhaust cam to fit 500cc SOHC engine - with same profile as original 500cc M30/Longstroke Manx Profile 

£225.00 *

SOHC Model 30International 500cc Inlet and Exhaust Cam

Product no.: 0052 CAM002

- Inlet and Exhaust cam to fit 500cc SOHC Model 30/International engine 

£225.00 *

SOHC Model 40/40M 350cc Inlet and Exhaust Cam

Product no.: 0053 CAM003
- Inlet and Exhaust cam to fit 350cc SOHC engine - This profile is the standard International Norton SOHC 40M 64.66 and 63.89, which was fitted to both 350cc road International and post war 40M SOHC Manx models - They should also be suitable for early CS1's if you want a slightly lower profile than Inter cams. Update 04/10/2013: Cam maker retired, last few sets avail until I can find new maker!
£225.00 *

SOHC Model 30/40 Cam Securing Roller

Product no.: 0054 A11/796
- Silversteel roller that secures the two cams together. Quite a difficult piece to make, as it has a tight length tolerence - to avoid the issue of the cams not fully mating together (too long), or there not been enough protruding from both cams (too short).
£3.30 *

SOHC Model 30/40 Camshaft

Product no.: 0055 A11/790
- Camshaft to fit all standard Model 30/40 and CS1/CJ camshaftsl - This camshaft is for the standard (side oil feed) cambox type bikes
£110.00 *

SOHC Model 30M/40M SOHC Manx Camshaft

Product no.: 0056 A11M/790
- Camshaft to fit all central oil feed racing camshaft engines - This camshaft has provision for a central oil feed, as used on racing engines. Can also be used on standard side feed engines if required
£120.00 *

SOHC Camshaft Bevel Securing Nut

Product no.: 0057 A11/772
- This nut fits on the bevel end of the camshaft, and is lipped, to hold the bevel pin - made in high tensile steel
£8.00 *

SOHC Camshaft Nut - Left Hand Thread

Product no.: 0058 A11/799

- This nut fits on the end of the camshaft after fitting cams and roller back bearing - This nut should be tightened to 55lb sq inch, therefore it is extremely difficult to remove. Sometimes it is actually less destructive to destroy this nut when removing it from the camshaft. Back In Stock Dec 09 - And now CNC machined from solid high tensile EN8 round bar (as high tensile imperial hexagon bar is getting very difficult to obtain)

£6.80 *

SOHC Cam Rocker Pivot Bolt

Product no.: 0059a A11/810
- This is the distinctive hardened pin fitted to all SOHC cambox's, that acts as the bearing pin for the cam rockers. This item is a faithful copy of an original, CNC machined, then hardened and ground. Please Note: This item is the standard pin fitted from early 1930's through to the late 1950's, however, very early engines had a slightly different pin. Please email me for details if you are unsure. Update Dec 2010: I will shortly be able to offer the entire cam rocker bearing assembly as well as a fitting and honing service. Please email for details if you are interested
£20.00 *

SOHC Cam Rocker Pin Castellated Nut

Product no.: 0059b A11/811
- This is the castellated nut that is used with the rocker pin, it being castellated to allow for iit to be locked with a split pin once tightened. This nut is patterened on an original, but is made in Stainless Steel, so it will not rust
£5.50 *

SOHC Cam Rocker Outer Bearing Set

Product no.: 0059c A11/806-9

Cambox rocker outer bearing assembly, consisting of one phospher bronze bearing cage, one outer bearing, 2 hardened side washers and 12 rollers. See detail listing for important information

£31.00 *

SOHC Cam Rocker Full Bearing Set

Product no.: 0059d Roc1

Complete cambox rocker bearing assembly, consisting of one phospher bronze bearing cage, one outer bearing, 2 hardened side washers,12 rollers and also the cam rocker pivot bolt and castellated nut. See detail listing for important information

£55.00 *

Rocker Bearing Cage : Imperial (cage only)

Product no.: 0059F Imp01

Replacement phosphor bronze cage - for refurbishing original rockers. This listing is for imperial cage only

£14.00 *
In stock
can be shipped within 60 days

SOHC Cam Rocker Honing Service - Per Rocker

Product no.: 0059e Hone1

Fitting and Honing service for a rocker bearing assembly into your Rocker arm, see detail listing for more information

£30.00 *

SOHC Rocker Arm Tappet Adjuster Assembly (3 Parts)

Product no.: 0060 A11/803,4,5
- 3 piece tappet adjuster set, including tappet pad, outer adjuster and full width locknut - Fits all SOHC rocker arms. - A very popular item, as these are one of the main consumables of this engine.
£26.00 *

SOHC Rocker Arm Tappet Adjuster - Spare Nut (Each)

Product no.: 0060b A11/803b

- Spare top nut for the 3 piece tappet adjuster set.  

£1.80 *
In stock

SOHC Rocker Arm Rocker Pads

Product no.: 0061 A11/802
- Hardened rocker pads that press into the rocker arms - high quality replacement for a part that is often badly worn - This is for the standard shaft diameter item, which should be selected if the old item was a tight/press fit into the rocker arm. If the rocker arm had a loose fitting rocker pad then select an appropriate oversize rocker pad instead. - If you are unsure, but have an old rockepad to measure - these replacement items have a shaft diameter of exactly 0.312" (Std).
£17.50 *

SOHC Rocker Arm Rocker Pads: +0.002" Oversize

Product no.: 0061b A11/802+2
- Hardened rocker pads that press into the rocker arms - high quality replacement for a part that is often badly worn - This description is for a rockerpad with a +0.002" (2 thou) oversize shaft. This can be used if you believe the hole of the rocker arm is worn and the old item had become a loose fit. - If you are unsure, but have an old rockepad to measure - these replacement items have a shaft diameter of exactly 0.314" (Std 0.312" + 0.002").
£17.50 *

SOHC Rocker Arm Rocker Pads: +0.005" Oversize

Product no.: 0061c A11/802+5
- Hardened rocker pads that press into the rocker arms - high quality replacement for a part that is often badly worn - This description is for a rockerpad with a +0.005" (5 thou) oversize shaft. This can be used if you believe the hole of the rocker arm is very worn and the old item had become a very loose fit. - If you are unsure, but have an old rockepad to measure - these replacement items have a shaft diameter of exactly 0.317" (Std 0.312" + 0.005").
£17.50 *

SOHC Rocker Bearing Cork Side Washer - Standard

Product no.: 0062 A11/813
- Cork Washer, fits on either side of the rocker arm bearing - Fitting new cork washers helps keep the cambox oiltight (yeah, fat chance!) - Cork thickness = 2.0mm
£1.30 *

SOHC Rocker Bearing Cork Side Washer - Medium

Product no.: 0062b A11/813M
- Cork Washer, fits on either side of the rocker arm bearing - As there seem to be many slight variations in the SOHC cambox over the years, these thicker washers can be used if the rocker arms are not tight on assembly, having tried fitting standard cork washer - Cork thickness = 2.4mm
£1.40 *

SOHC Rocker Bearing Cork Side Washer - Thick

Product no.: 0063 A11/813T
- Cork Washer, fits on either side of the rocker arm bearing - As there seem to be many slight variations in the SOHC cambox over the years, these washers can be used if the rocker arms are not tight on assembly, having tried fitting standard cork washer - Cork thickness = 3.0mm
£1.40 *

SOHC Cambox Rubber Pad Bottom Adjusting Screw

Product no.: 0064 A11/817

SOHC Cambox Rubber Pad Bottom Adjusting Screw (Stainless Steel) - Original Type.  Note: Youtube link in detail listing to see this part being made

£9.00 *
In stock

Reduced Head Nuts for Cambox Rubber Adjusters

Product no.: 0064b A11/818

-Stainless Steel reduced head nuts, as originally fitted to the rubber pad (square) adjusting screw A11/817

£1.60 *
In stock

SOHC Cambox Rubber Pad Bottom Adjusting Screw - Longer Type

Product no.: 0064L A11/817L

SOHC Cambox Rubber Pad Bottom Adjusting Screw (Stainless Steel) - Longer Type.  Note: Youtube link in detail listing to see this part being made

£9.00 *
In stock

SOHC Camshaft Bevel Locating Peg

Product no.: 0065 A11/773
- Peg used to retain large camshaft bevel gear to camshaft - If your existing pin has any wear on it at all then it should be replaced, or false valve timings will be otained.
£7.00 *

SOHC Camshaft Oil Feed Plunger - Racing Type

Product no.: 0066 A11M/792
- This is the bronze plunger used to feed oil to the camshaft lobes if using central oil feed on your cambox, i.e. Racing Internationals and SOHC Manx (shown on left in this photos) - Note : These plungers are not interchangeable with the Bigend Feed Plunger, as that plunger has a bigger feedhole!
£9.80 *

SOHC Camshaft Oil Feed Plunger - Featherbed Type

Product no.: 0067 A11F/792
- This is the bronze plunger used to feed oil to the camshaft lobes. This version is the shorter version that was fitted to Featherbed Internationals, which is used in conjunction with a shallower Jet Holder Nut, to avoid fouling the Featherbed top frame tube - Note: this is the small plunger on the right hand side in the photograph
£9.50 *

SOHC Big End/Camshaft Oil Feed Jet Holder Nut

Product no.: 0068 A11M/793
- Stainless steel nut that fits over jet holder on the International and SOHC Manx timing cover (feeding oil to the BigEnd). - The same nut is also used on pre-Featherbed SOHC Manx Norton cambox covers (i.e. those with an additional oil feed). These nuts are very nicely made and really set the engine off well
£8.00 *

SOHC Featherbed Camshaft Oil Feed Jet Holder Nut

Product no.: 0069 A11/716

- Stainless steel nut that fits over jet holder on the Featherbed cambox bevel cover. - Note: this item is shallower than the standard type and is shown on the left of this photo

£8.00 *

SOHC Big End Oil Jet Holder

Product no.: 0082 A11/13

- This is the jet holder that screws into the inner timing cover and retains the big end feed plunger - This is also used for the similar item on the racing cambox bevel cover for holding the camshaft oil feed jet holder - Aug 2012: Now back in stock!

£11.00 *
In stock

SOHC Big End Oil Jet Holder + 2 Thou Oversize

Product no.: 0082_2 A11/13+2

SOHC Big End jet holder, but 2 thou of an inch oversize in the shoulder

£11.00 *
In stock

Jet Holder Nut - Copper Washer

Product no.: 0083C A11/716C

Copper washer that will fit behind the jet holder nut used on the timing case and racing cambox covers

£0.90 *

SOHC Rear Cambox Cover Gasket

Product no.: 0084 2X48
Paper gasket to fit all SOHC cambox back plate/cambox. This gasket is made specially for me and is virtually identical to the original Norton rear cambox washer listed in pre-war Spare Parts catalog.
£2.85 *

SOHC Front Cambox Cover Paper Gasket

Product no.: 0086 A11/782M
- Traditional paper gasket for all SOHC Cambox bevel covers, both Manx and International
£2.40 *

SOHC Breather and One Way Valve Copper Washer- Pack of 3

Product no.: 0091b E5264-C2

- 1/4" BSP Copper Washer - pack of 3. This washer is suitable for use in 3 places - the Drive Side One Way Valve and the straight through breather or unions fitted to SOHC crankcase fittings and cambox. These washers are not quite as wide as item 0090b, and therefore look less obtrusive when fitted behind these unions (you may decide though you prefer to fit red fibre washers which we also sell). These can also be fitted to 1/4 BSP petrol taps. Sold as a pack of 3

£1.90 *

SOHC Camshaft Oil Feed Spring

Product no.: 0097 A2/14
This is the spring that fits behind the oil feed plunger on racing cambox's (price is for the spring only). Made to original pattern
£1.80 *

Cam Rocker Arm Lipped Side Washer

Product no.: 0287 A11/814
For those rocker arms that are fitted with lipped side washers (which is by far the most common type of rocker arm – identifiable by its machined lip on each side of the bearing boss), these lipped washers (termed Steel Cup's in the 1948 catalog) are manufactuerd in hardwearing EN8 steel. These fit over the rocker arm bearing on each side, and provide a flat face for the cork washers to seal against. 4 required per cambox.
£5.50 *

Cam Rocker Arm (none lipped) Side Washer

Product no.: 0288 3050
For the earlier type rocker arms - which are identifiable by not having a machined recess to take the later 'lipped washer', I have had a batch of the cam rocker steel washers, that fit between the rocker arms and the cork washers. As well as not having a lip they are also slimmer than the later lipped type (see the second photo - the rocker arms for these type, on the right, do not have a machined recess). Note: These steel washers will not fit the very earliest cam rockers (fitted approx pre-1932) which have a different centre boss diameter These fit over the rocker arm bearing on each side, and provide a flat face for the cork washers to seal against. 4 required per cambox. By the way, it is important with these type to ensure the side walls of the rocker arm are absolutely flat with no burrs, otherwise oil will leak from the rockers more profusely
£4.90 *

Cambox Rocker Rubber Pad - Set of 4

Product no.: 0308 A11/815
Cut/planed from hard wearing oil resistent rubber (Nitrile), to the same width and thickness as originals, these are fitted both above and below the rocker arm central boss in all SOHC cambox’s. Along with the cork side washers, it is these being worn that normally results in these cambox’s leaking badly. An original single piece rubber (new old stock from the 1940’s I believe, I bought some many years ago from that great Norton exponent Phil Heath) was used as a template to ensure the correct width. This original type was supplied longer because each one was cut into two, i.e.one rubber for each rocker arm. As shown in the 1948 catalog, I supply two separate ones of similar length, both of which are slightly longer than required, which can be carefully trimmed to your required depth. (They should be trimmed so they protrude just proud of the cambox slot, so the rocker arm has to be forced – carefully, into the cambox). The smooth end should be abutting the rocker boss and your trimmed end opposite.
£14.00 *

Camshaft Bevel Shim - Various Sizes

Product no.: 0328 A11/774

- Essential when rebuilding your engine to ensure that the upper vertical bevel gear has the correct backlash and position in relation to the camshaft bevel gear, these camshaft bevel shims fit between the camshaft and the front cambox bearing (i.e. in the front cambox well). - Fitted in conjunction with the upper vertical bevel gear shim, the ideal positioning is acheved when the gears are in line and there is a just perceptible gap (backlash) between teeth. - Available in the following 5 sizes : 0.002"/0.004"/0.008"/0.016"

/0.023". - Note: if buying individual shims, please state size when you place the online order, thanks. Update Feb 2015: Now back in stock again

£1.90 *

Camshaft Bevel Shim - Set of 5 Shims

Product no.: 0328b A11/774-s

- Essential when rebuilding your engine to ensure that the upper vertical bevel gear has the correct backlash and position in relation to the camshaft bevel gear, these camshaft bevel shims fit between the camshaft and the front cambox bearing (i.e. in the front cambox well). - Fitted in conjunction with the upper vertical bevel gear shim, the ideal positioning is acheved when the gears are in line and there is a just perceptible gap (backlash) between teeth. - This is for a complete set of 5 shims in the following sizes : 0.002"/0.004"

/0.008"/0.016"/0.023". (with a cost saving over buying them separately). When buying this set, I also include the A11/788 Camshaft back bearing distance piece (this can also be bought separately). Update Feb 2015: Now back in stock again

£9.00 *

Camshaft Back Bearing Distance Piece

Product no.: 0329 A11/788
- This is the distance piece that betweens the cams and the cambox back bearing. It ensures the back bearing inner cage and rollers are sititng centrally in the outer bearing (which is located in the cambox rear cover. Note this distance piece is 55 thou thick, which I find to normally be correct, but you should check yourself that this thickness locates the bearing in the correct position, as this can sometimes vary as there were many slight variations over the years. To help with this, place thick high melting point grease in the outer cage of the back bearing, then trial fit the back cover, you can then see from the marks in the grease if the inner race is in the correct position. This distance piece is also supplied as part of the camshaft bevel shim set.
£1.90 *

SOHC Rocker Box Rubber Pad Roller - Per Pair

Product no.: 0343 A11/816
These are the half circular hardened steel plates that are located beneath the lower cambox rubbers, and which the rubber adjuster screws (A11/817) push against to ensure the lower cambox rubber's are held tight against the rocker arms. There are two per cambox, and are therefore sold as a pair
£12.00 *

SOHC Camshaft Spacer Ring

Product no.: 0352 A11/798
This is the distinctive slotted spacer ring that fits over the camshaft in the tunnel area between the front (bevel gear) chamber and the rear (cam) chamber. On racing cambox's that employ the centrally fed camshaft oilway, this is no more than a spacer ring, however, for the road going type cambox, which uses a solid camshaft, this spacer ring is very important as oil is fed to the cam chamber along the slot. For this reason, there is a slight lip one one end, to ensure the bush can only be fitted in one direction
£9.75 *

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 *

Timing Side Mainshaft \ Camshaft Woodruff Key

Product no.: 0356 A11/797
This is the Woodruff key that fits on the Timing Side mainshaft key and retains the mainshaft bevel. It is also the same woodruff key that is used on the SOHC camshaft to retain the cams (both keys are the same). This item is for a pack of 3 woodruff keys
£2.20 *

Exhaust Valve Lifter Volute Spring

Product no.: 0379 A3/69

This is the correct type 'volute' spring of the type originally used Norton Internationals (and also OHV and SV Nortons) to hold the exhaust valve lifter cable in tension correctly. 

£3.50 *

SOHC Eccentric Exhaust Valve Spindle

Product no.: 0401 A11/64

This is the eccentric pin that fits in the bearing boss at the front of those cambox's that are fitted with provision for an exhaust lifter mechanism (see the accompanying photograph for how the pin fits in this boss). 

£14.00 *
In stock

SOHC Cambox - Exhaust Valve Lifter Bearing

Product no.: 0640 A11_695

This is the shouldered SOHC Cambox - Exhaust Valve Lifter Bearing that holds the eccentric exhaust valve lifter spindle - made in phospher bronze

£11.00 *
In stock

SOHC Exhaust Valve Lifter Arm and Bolt

Product no.: 0416 A11/67+68

This is a faithful reproduction of the SOHC exhaust valve lifter arn and the special 'reduced head' bolt that is fitted with it. 

£25.00 *

SOHC Exhaust Valve Lifter Set

Product no.: 0417 Exh_Lifter_Set

This listing is for a complete SOHC Exhaust valve lifter set consisting of: Eccentric valve lifter spindle, Valve lifter arm and bolt, and the volute spring. 

£41.00 *

Norton SOHC - Rocker Box Feed Pipe - Complete

Product no.: 0629 A11M/789

Complete Cambox Feed pipe and 1/4" BSP union nut's to fit all SOHC models (30/40, M30/M40 etc) - pipe length can be adjusted

£25.00 *
*
Recommended Retail Price, plus delivery
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