1.f Norton SOHC Timing Case & Crankcase Parts

Correct (and as per original) 1/4" BSP 'One Way Valve' - as fitted to all Norton singles, including all SOHC, OHV and SV models - this item screwing into the recess just above the drive side main bearings, allowing the engine to breathe correctly. July 2023: Now back in Stock 

This is a faithful reproduction of the straight through union fitted to SOHC (and DOHC) cambox's for connecting the cambox oil feed pipe (fitted at top of crankcase and cambox), but also used as a front crankcase breather on many Inters and magnesium racing engines.  Finally it is also fitted as a breather union on the bevel chamber of magnesium racing crankcases behind the inner timing cover (while Inter crankcases instead employ a pressure telltale unit).  Copied from an original pre-war item

This is modern replacement for the straight thru breather used on Norton crankcases and timing cases - but uses AF Hex (not Whitworth) - if you are not worried about originality!

These Red Fibre Washers are a smaller diameter than 'normal' 1/4" BSP washers - but then pre-threaded by us - so they are a good fit on those Norton fittings that used 1/4" BSP thread, but have a groove behind the thread - e.g. Norton pre-48 Oil Sump Plugs and some breather union fittings.  See detail listing for more information.  This listing is for a bag of 5 washers

These Red Fibre Washers are a smaller diameter than 'normal' 1/4" BSP washers - but then pre-threaded by us - so they are a good fit on those Norton fittings that used 1/4" BSP thread, but have a groove behind the thread - e.g. Norton pre-48 Oil Sump Plugs and some breather union fittings.  See detail listing for more information.  This listing is for a pair washers

These Red Fibre Washers are a nice close fit on 1/4" BSP threads and are useful for many Norton fittings - such as those breather unions and petrol taps that have a 1/4" BSP thread that comes up close to the hex or shoulder. Unlike many BSP fibre washers available these days - these ones are a good fit to the thread.  See listing for more information. Price is per pair

- Modern equivelant Dowty washer (outer washer is zinc plated steel, inner washer is neoprene). This washer is used behind the timing chamber filter bolt and also at the back of the rear cylinder crankcase mouth bolt (that has an oil feed)

- Good quality Copper washer suitable for 1/4" BSP fittings on most Norton SOHC/OHV/SV engines - i.e. One Way Valves, Breather Unions and Crankcase Oil unions. They can also be fitted to 1/4 BSP petrol taps if required - see listing for details. Sold as a pack of 3

This is the oil tank union fitted to many International\Manx oil tanks with the larger 3\8" BSP fitting on both sides (crankcase unions were smaller on the crankcase side). Please note - these do not have gauze filters fitted, which the 'Feed' side union would have had originally (I might make some of these in the future). Gauze can easily be added in by soft soldering.

Red Fibre washer that fits over most 3/8" BSP Banjo fittings, as well as 3/8" BSP Oil Tank fittings.  These washers are a good 'sized' fit - which is important for getting a good seal. These are sourced from a top quality manufacturer.  Price is for a Pair

- Essential when rebuilding your engine to ensure that the mainshaft bevel has the correct backlash and position in relation to the lower vertical bevel gear, these mainshaft shims fit between the timing side main bearing and the mainshaft bevel gear - This shim is used once the crankshaft has been shimmed and you are fitting the lower bevel gears. This is for a single shim in one of the following sizes: 

0.5mm/0.3mm/ 0.2mm/0.1mm/0.05mm.  See listing for more detail on thicknesses.

- Essential when rebuilding your engine to ensure that the mainshaft bevel has the correct backlash and position in relation to the lower vertical bevel gear, these mainshaft shims fit between the timing side main bearing and the mainshaft bevel gear. This is for a complete set of 5 shims in the following sizes : 

0.5mm/0.3mm/ 0.2mm/0.1mm/0.05mm.  See listing for more detail on thicknesses.

This listing is for a stainless steel mounting stud, as used on magnetos fitted to Norton SOHC Crankcases - this being the slightly shorter version, see also Item 1168 for a longer version.  Normally there were 3 studs fitted to the base of the magneto when used on SOHC engines.  We CNC manufacture these studs to the original dimensions - but this shorter type were more often fitted to Lucas Magdyno's - see detail listing for more information before ordering.  This type of stud were also fitted to many other motorcycle makes using platform mounted magnetos.  Price is per stud

This listing is for a stainless steel mounting stud, as used on magnetos fitted to Norton SOHC Crankcases - this being the slightly longer version, see also Item 1167 for a shorter version.  Normally there were 3 studs fitted to the base of the magneto when used on SOHC engines.  We CNC manufacture these studs to the original dimensions - but this longer type were more often fitted to BTH KD1 type magnetos - see detail listing for more information before ordering.  This type of stud were also fitted to many other motorcycle makes using platform mounted magnetos.  Price is per stud

This listing is for a 'standard' magneto length nut - that fits both our Lucas and BTH magneto mounting studs on SOHC engines.  This same nut can also be used on other motorcycle marques using either Lucas and BTH platform magnetos.  These nuts are CNC manufactured to original dimensions - but have a lip on their platform facing end - so as to not damage crankcase castings if the washer is lost in fitting.  See detail listing for more informaion.  Stainless Steel, Price is Each

This listing is for a 'Long Length' magneto bolt/nut - of the type that were fitted on the rear fitting of the magneto platform on SOHC Norton engines.  This type of 'wasted' extra long nut were designed this way - because then they would protrude down beyond the rear engine plates, and so be easily accesable - to allow for magneto chain adjustment.  This extra long type were fitted to all Pre-Featherbed SOHC models.  They are CNC bar turned to the original 'wasted and 'drilled' dimensions of the original, in the correct imperial Hex stainless steel.  See detail listing for more information.  Price is Each

This listing is for a Featherbed type 'Long Length' magneto bolt/nut - of the type that were fitted on the rear fitting of the magneto platform on SOHC Norton engines.  This bolt is similar to our Item 1170, but the rear magneto mounting nut on Featherbed road models (i.e Featherbed International) were of this shorter length than the pre-Featherbed type.  They are CNC bar turned to the original 'wasted and 'drilled' dimensions of the original, in the correct imperial Hex stainless steel.  See detail listing for more information.  Price is Each

This listing is for a stainless steel mgneto sprocket (engine side) nut as fitted to the SOHC oil drive gear spindle, or the OHV/SV camshaft spindle.  These nuts are same thread and dimensions as original.  Price is per nut

This listing is for the special shouldered sprocket nut that was fitted to Lucas Mag/Dyno units - on all roadgoing Norton single cylinder models (but also many other makes of British motorcycles using a Lucas Mag/dyno unit, original part number 24-0195.  This nut is plated steel.  Price is Each

Breather Pipe (listed in Norton 1948 catalog as Pressure Release Pipe) and 1/4" BSP union nut to fit bevel chamber of all SOHC models (30/40, M30/M40 etc)

Breather Pipe (listed in Norton 1948 catalog as Pressure Release Pipe) and 1/4" BSP union nut to fit bevel chamber of all SOHC models (30/40, M30/M40 etc)

Complete Cambox Feed pipe and 1/4" BSP union nut's to fit all SOHC models (30/40, M30/M40 etc), with lockwired oil resistent pipe middle piece - so pipe length can be adjusted to suit the height length of your crankcase/barrel/head/cambox combination.  Comes as complete assembly, with spare lockwire length

Breather pipe to fit breather union of type fitted to the front of drive side crankcase - most commonly fitted to magnesium M30 (and early pre-Featherbed Manx) crankcases 

Crankcase feed pipe to cambox and 1/4" BSP union nut's to fit all SOHC models (30/40, M30/M40 etc) - this is the bottom piece of the cambox feed pipe assembly - which we offer here to be purchased seperately

Lockwire:  12"/(approx) 300mm length of Goodrich stainless steel lockwire, for lockwiring breather pipes

Black (original rubber style) 5/16" oil reistent pipe for cambox feedpipe assembly - 4.5"/110mm length

Black (original rubber style) 5/16" oil reistent pipe for use for oil breather pipes, oil pipes (or even big bore fuel pipes if required - although 1/4" bore pipe is more normally used) - 3 foot /900mm length - This type is ethanol proof and all writing removed

Lasercut and then dull nickel plated washers to fit the 0.5" front engine bolt (i.e. the bolt that secures the front engine plates to the frame down tube). Normal 0.5" commercially available washers are too wide, these are much closer to the original washers. Price is for a pair of washers

Black (original rubber style) 5/16" oil reistent pipe for use for oil breather pipes, oil pipes (or even big bore fuel pipes if required - although 1/4" bore pipe is more normally used) - 3 foot /900mm length