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

This high quality oil resistent (and ethanol proof) pipe is the correct length for the cambox feed pipe assembly if you use the type of feed pipe assembly that has a flexible piece in the middle.  All writing from the pipe has been removed

Using this type of oil pipe (rather than the more modern clear pipe) adds a very nice period touch to your restoration - particularly on competition and sports bikes 

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) - this listing is for a 3 foot /900mm length

This high quality oil resistent (and ethanol proof) pipe has the correct look and feel to the original black rubber type used on most classic motorcycles in the 1930's - 50's.  This type of pipe was often used on competition bikes.  All writing from the pipe has been removed (a particularly ardous and time consuming task - as all modern pipes are supplied with the makers details along the length of the pipe - which I then have to remove).  

Note: this pipe is high quality 'Codan' pipe (a Denmark manufacturer), hence the price 

Using this type of oil pipe (rather than the more modern clear pipe) adds a very nice period touch to your restoration - particularly on competition and sports bikes 

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 high quality oil resistent pipe has the correct look and feel to the original black rubber type used on most classic motorcycles in the 1930's - 50's.  This type of pipe was often used on competition bikes.  All writing from the pipe has been removed (a particularly ardous and time consuming task - as all modern pipes are supplied with the makers details along the length of the pipe - which I then have to remove).  

Note: this pipe looks exactly the same as Item 0634, except is from an earlier batch, and therefore does not come as certified as Ethanol proof.  It is still rated as oil-resistent and as I sell this pipe as oil and breather pipe, should work just as well for that purpose - and is slightly cheaper than Item 0634

Using this type of oil pipe (rather than the more modern clear pipe) adds a very nice period touch to your restoration - particularly on competition and sports bikes 

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

This special 'one way' valve' looks almost identical to the 1/4" BSP 'straight through' breather that was also fitted to various Norton single cylinder engines, but serves a very different purpose - it being fitted just above the driveside main bearings, and allowing the engine to 'breathe out' but not ''breathe in', which is achieved by the use of small bearing fitted inside the valve.  

This valve was fitted to all SOHC (and DOHC) crankcases (as well as all OHV and Side Valve models) behind the drive side mainshaft casting. On original engines this special valve is almost always badly chewed engines and is now almost impossible to find. They were also fitted originally in bare brass, as shown. This version, like most items I am reproducing, has been manufactured to be indistinguishable to the original, and as normal in this case an original was used as the pattern.

The outer breather union is machined to the same Whitworth spanner hex as the original, is plain brass and has the same thru-hole size as original. It is threaded internally to take a small screw in insert, which retains a small ball bearing (in stainless steel, to prevent corrosion), which provides the one-way breather mechanism.

These should be fitted with the inner screw in section showing uppermost (just in case you are not sure), to ensure the breather allows pressure to escape out - not the other way round.  I get asked by lots of single cylinder Norton customers why their engine may be leaking more oil than normal or not oiling properly - I always direct them first to check if this one way valve has been replaced by a 'straight thru' breather by mistake, or even worse - it is fitted, but is screwed in the wrong way round!

As a final point - like the original Norton Items, our breathers can be stripped for cleaning if ever needed - but it is important to note which way the inner portion is screwed in, as although they look almost identical both ends - they are actually 'sided' with one slightly different to the other.  Once re-assembled, you should always blow through them, to ensure they will only passage of air in one direction

Update July 2023:  Now back in stock - of this popular (and for most Norton singles - very important) part.  FYI - these valves have a lot of setup time and multiple ops - to provide correct dimensions on all parts, including milling.  However - despite the cost of 'Imperial' hex brass bar having almost tripled since we last manufactured a batch 2.5 years - our price increase over that time has stayed far less.  

These are the unions that screw into the crankcase behind the timing chamber - it is the smaller 1/4" BSP side that screws into the crankcase, the larger side is 3/8" BSP and takes the distinctive large oil pipes fitted to Norton Internationals.

These are CNC machined in-house by ourselves from good quality imperial Hex brass, to the original Norton dimensions.

As with the smaller breather union, we also offer a cheaper modern alternative using modern AF spanner sizes on the hex, but the hex on those are larger - while the version you see listed here are copied from a pre-war orignal and are made with the correct Whitworth Hex spanner size and indistinguishable from the original.

I have to say that I have seen SOHC crankcases with original unions both in plain brass (like these) and cadmium plated, but I know the pattern we used for this type came from an original SOHC engine and was in plain brass, and did not have chamfers on either end of the hex (unlike modern equivelants which has a much larger AF hex, does have chamfers, and has a more modern looking cadmium plate finish) - so these brass versions shown here I think look much more correct.   Sorry they are not cheap compared to modern AF equivelant - but they are CNC machined by us - not a mass produced modern version.

Fitted to all SOHC Engines (and I believe also fitted to DOHC engines as well), with two fitted per engine (price is each).  We also sell the correct high quality wide red fibre washers to fit these and ensure they do not mark the crankcases (Item - 0112)

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). 

It has been copied from an original item fitted to an unrestored an original pre-war racing (magnesium) cambox - the union looking like it had never been removed, so I am confident it as was as original fitment from Norton's.

This union has a flat end on the side that screws into the cambox and a taper on the end that the oil pipe fits onto.  It also has a slight chamfer on the side that screws into the cambox, just as the original does (I always fits either a red fibre or copper washer on the end that screws into the cambox/crankcase, to avoid marking the alloy - see item 0249).

Sorry these are not cheap, but unlike modern BSP union's (normally mass produced using AF hex and a modern tinted cadmium finish), these are CNC machined in small batch's from brass and use the correct Whitworth hexagon size

Note:  I have seen these unions in both brass and dull nickel plated (often brass being fitted to pre-war engines).  These are brass finish, which I think looks better, but I may be having some dull nickel plated in the near future. Email Sales@racingvincent.co.uk if you want an update on these

This is modern replacement for the straight thru breather used on Norton crankcases and timing cases. (note: it is a breather - not the one-way pressure release valve also used on Norton engines, this is listed elsewhere). It has a slightly larger AF hex than original, however it is reasonably priced if you are not too concerned on originality, is a good quality item and is cadmium plated

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.

These are (vulcanised) red fibre washers to fit the 1/8" BSP thread on the Norton Oilers (Item 0570 and 0571).  If you are purchasing the oilers - then they already come supplied with the red fibre washer, but these can be used if you want additional spacing (to ensure you can adjust them to tighten into just the right position without stressing the thread), or if you have original oilers or other 1/8" BSP connectors that need new washers.  As always, these washers come from a high quality specialist supplier and are 1mm thick.  They come supplied in a pack of 4

- Modern Reproduction of the classic 3" butterfly filler cap as fitted to Norton International and pre-featherbed Manx Norton petrol tanks. Note: These filler caps as supplied to me do not have the cork sealing washer - which I think is pretty poor - so I have had a press tool made for making these from the correct gasket cork, I then fit them before sending out (if buying from elsewhere you may want to check they come with these washers - I suspect they will not!).