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#806296 04/22/20 10:30 pm
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mrcarb Offline OP
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I am trying to put a 76 Bonneville basket case back together. My question is about the angle of the two fuel banjos that came with the bike, one is a v-shaped banjo and the other is more than 90 degrees. The pictures that I have found on the internet appear to have both carbs using v-shaped banjos. Would anyone reading this know if one banjo is v-shaped and the other is more that 90 degrees? Or if both are v-shaped?

I hope that this question makes sense.

Thank you in advance.

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Both V shaped, I haven't actually measured one [never felt the need to] but guessing at around 120-150 degrees. AMAL website may have the actual V angle?

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Originally Posted by mrcarb
I am trying to put a 76 Bonneville basket case back together. My question is about the angle of the two fuel banjos that came with the bike, one is a v-shaped banjo and the other is more than 90 degrees. The pictures that I have found on the internet appear to have both carbs using v-shaped banjos. Would anyone reading this know if one banjo is v-shaped and the other is more that 90 degrees? Or if both are v-shaped?

I hope that this question makes sense.

Thank you in advance.

Both should be 55 degree V-shaped.
https://www.classicbritishspares.com/products/83-3927

Discussed in another thread only recently.
http://www.britbike.com/forums/ubbthreads.php/topics/804166/new-carbs-choke-or-no-and-which-banjos

Last edited by L.A.B.; 04/23/20 2:29 am.
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mrcarb Offline OP
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Thanks for those answers.

Does the fuel line from the right petcock go to the right carb?



Thank you in advance

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Surely yes, there's no advantage to having fuel feed lines longer than necessary.
So each tap to each carb, and a link pipe between.

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Originally Posted by mrcarb
Does the fuel line from the right petcock go to the right carb?

cant see why it would matter .
diagonal crossed lines might be a straighter shot from tank shutoff-bend to banjo .

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Originally Posted by mrcarb
Does the fuel line from the right petcock go to the right carb?

Yes.

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Originally Posted by quinten
Originally Posted by mrcarb
Does the fuel line from the right petcock go to the right carb?

cant see why it would matter .
diagonal crossed lines might be a straighter shot from tank shutoff-bend to banjo .

That's how I did mine on my 69 Bonneville, no problems and its cleaner looking

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Stock setup IIRC, crossed the lines, i.e. Right petcock w/90 degree elbow to left carb banjo left petcock w 90 degree elbow to right carb banjo. Short straight piece on the other fuel line banjoes This keeps the fuel lines inside the bike for a cleaner look (US tank) the home market tank (breadbin) routed them outside the carbs I believe.

Pardon my drawing, I never claimed to be an artist!!

Steve

Banjo.jpg (22.3 KB, 196 downloads)
Banjoes

'77 T140J
"Vintage Bike". What's in your garage?

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Fitting round pegs into square holes since 1961...
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Same way mine are done, nothing wrong with that art work Prince!!!

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Originally Posted by JubeePrince
Stock setup IIRC, crossed the lines, i.e. Right petcock w/90 degree elbow to left carb banjo left petcock w 90 degree elbow to right carb banjo. Short straight piece on the other fuel line banjoes

Whether the lines cross over or not really makes no difference as each "petcock" feeds both carbs.



Originally Posted by JubeePrince
This keeps the fuel lines inside the bike for a cleaner look (US tank) the home market tank (breadbin) routed them outside the carbs I believe.

Not entirely correct as the same 83-3927 inward angled feed line with 55-degree banjos was used on UK/Gen.Ex. tank (pic below) until 77/78 when the UK/GenEx. tank "petcocks" were repositioned further forward and used a different 83-6209 external feed fuel line with 150-degree banjos.


http://www.britbike.com/forums/ubbthreads.php/topics/804166/new-carbs-choke-or-no-and-which-banjos

http://www.classicbike.biz/Triumph/Brochures/1970/77ModelsCanadaTri.pdf
[Linked Image from i.postimg.cc]




.

Last edited by L.A.B.; 04/25/20 7:30 pm.
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Originally Posted by JubeePrince
Stock setup IIRC, crossed the lines, i.e. Right petcock w/90 degree elbow to left carb banjo left petcock w 90 degree elbow to right carb banjo. Short straight piece on the other fuel line banjoes This keeps the fuel lines inside the bike for a cleaner look (US tank) the home market tank (breadbin) routed them outside the carbs I believe.

Pardon my drawing, I never claimed to be an artist!!

Steve

This above
I have tried all sorts, this set up works best.


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