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A: Oil Pipework Herringbone hose..


CollingsBob

Well Known and Active Website User
VOC Member
Does anyone know how many feet of the herringbone hose required to do a complete “C” twin? Both fuel and oil, please..
 

vibrac

Well Known and Active Website User
VOC Member
First find your hose:(
As far a I know the manufacturer ceased production, because the customer whose product that used the hose discontinued its use and our 'small' requirements were sitting on the shirt tails of his demand.
I believe the production equipment was also ancient bulky and is no more.
I belive some was around a year or so back but the internal bore was not concentric to the outer whether that came from the original source or someone trying an alternative method of production I have no idea
Making it is a bit more complicated than turning lengths of rubber tube on a lathe with a knurling tool o_O (joke!) but if anyone can think up a way of doing it in his shed he might sell a few hundred feet....
 

bmetcalf

Well Known and Active Website User
VOC Member
I got some hose for the return line that was called auto transmission cooler fluid line that is sort of herringbone. This was 20+ years ago and it has held up well.
 

Trickymicky

Website User
VOC Member
I have just bought some roll ends of Herringbone off Feked, they are, or were on their website. One piece of 5/16 which was either 10 or 11 inches long was enough for the return / rocker pipes. I have two similar pieces in 1/4 which i reckon will be enough for the fuel pipes, although not sure if it is ethanol resistant or not.
The 7/16 on the feed is about a foot long.
 

CollingsBob

Well Known and Active Website User
VOC Member
I purchased 5-13” lengths of A52 today..now I just need a piece of A65..I’ll try Feked tomorrow..
Thanks for all the tips.
 

chankly bore

Well Known and Active Website User
Non-VOC Member
Incidentally, all the lengths for hoses are in the Spares List. Allowances must be made for non-standard carburettors, anti-sumping valves and other deviations from Holy Writ.
 

chankly bore

Well Known and Active Website User
Non-VOC Member
G'day Bob. Here you go then: For standard Rapide: A52AS 4 1/4" x 4 off, A52/1AS 3" x 2 off, A52/2 11" x 1 off; all these are 5/16" i.d., therefore total length required is 2' 8". 9" of 3/8" i. d. is needed for the pump feed pipe, A65AS. Note that this is oil and petrol combined as shown on M018 and M019.
 

highbury731

Well Known and Active Website User
VOC Member
Original hose was smooth. I am not certain when the Factory started using the Herringbone hose, but it looks like it was used in later production.
David
When did the factory use plain tubing, and when go over to herringbone? The tatty remains I got with my '49 bike is herringbone.
Maybe a silly question, but which date do you put to a bike? Mine was built in October '49, tested in November, and despatched in June '50
Paul
 

Albervin

Well Known and Active Website User
VOC Member
When did the factory use plain tubing, and when go over to herringbone? The tatty remains I got with my '49 bike is herringbone.
Maybe a silly question, but which date do you put to a bike? Mine was built in October '49, tested in November, and despatched in June '50
Paul
In the UK it was the norm to date a vehicle made after the motor show as the following year. So, made Nov. 49 it is a 1950 model. Then when plates had an alpha such as VIN 998A they were considered the next year's model after the plate was released, usually August. All very confusing. When was your bike first registered?
 

vin998

Well Known and Active Website User
VOC Member
VOC Forum Moderator
Maybe a silly question, but which date do you put to a bike? Mine was built in October '49, tested in November, and despatched in June '50
Paul
As machine registrar I always use the date the bike left the factory as it is an exact date where as a bike took days (or in some cases months) to build so nothing exact with that. The UK DVLA registration authority use the despatch date as well.
I also believe the date a vehicle left the factory used to have some tax implications, as in that they didn't have to declare it as a sale until then when it went onto the company book for calculating tax due.

Sorry I know that has nothing to do with Herringbone hose.

Simon
 

davidd

Well Known and Active Website User
VOC Member
When did the factory use plain tubing, and when go over to herringbone?
I can only notice that smooth tubing was used in the original photos. I see herringbone in almost all of the 1953 and later photos and none in the photos up to 1951. It is possible that the factory used both as both seemed to be available.

Assuming that herringbone lines were always available and then at some time became the preferred supplier to the parts department, I could see how herringbone became the "known" standard. However, if you look at early photos of Lightnings and Flashes, the oil lines are smooth.

2749 06 01.png

The above Black Lightning was offered for the 1950 model year.

David
 

CollingsBob

Well Known and Active Website User
VOC Member
Interesting..my machine left the works in January 1953, so I assume herringbone hose is correct for it.
 

highbury731

Well Known and Active Website User
VOC Member
When was your bike first registered?
It was one of the 'warehouse' bikes, and one of a batch of 40 bikes sent to a large dealer in the Brighton area (I think it was Redhill Motors). The registration records are lost, so I don't know when it was actually registered for the road. Probably mid to late 1950. It was registered KUF 5**, which may actually give a date.

If the main oil feed pipe A65 is made a bit longer than standard it allows the removal of gearchange cover G1 without disconnecting the bottom banjo bolt. Cheers, Stu.
Great, how long, how much longer than standard?

I see herringbone in almost all of the 1953 and later photos and none in the photos up to 1951. It is possible that the factory used both as both seemed to be available.

Assuming that herringbone lines were always available and then at some time became the preferred supplier to the parts department, I could see how herringbone became the "known" standard. However, if you look at early photos of Lightnings and Flashes, the oil lines are smooth.
David
So plain piping is actually correct for my bike, even though I have tatty herringbone pipe in the bits box. It would also be easier to keep clean.
Paul
 
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