Britbike forum Forums British motorcycles in general British motorcycles in general OIF Bonneville Fuel Hose Routing

Has anyone got a pic of the proper fuel hose routing for an Oil in Frame Bonneville? I can't find anything definitive. I've got to make a new set of hoses and have not got a good photo reference. (Even better if someone also has hose length specs for me too.)

thanks in advance.
Nate

Good link
I do believe that the fuel lines route to the inside of the carbs. 90 0r 60 degree fittings at the tank, fuel line inside the carbs to 50 degree fittings at the bowls.

Why are fuel hose lengths impossible to find? I need to know how long to make my hoses. Seems like this should be documented somewhere...

Just cut three sections to the lengths required.

That might lead some rivet counter to measure and take off points at a show.
Never mind that the line you use might be herringbone, marleybone, chicken bone, or whatever bone Triumph had on hand the day your bike was built.

Well the idea was to have the fuel lines built and ready before installing the carbs and tank. But I ended up doing just that today since I couldn’t get anyone to cough up a measurement.

That’s best way of doing it. If you use crimp type ferules you can get them all in place. Remove the fittings from carbs and tank and then crimp them or have some one with hydraulic pipe making tools to crimp them for you.

you can buy the fuel line assemby pre-made ( for a price )
they cross over inside the carbs ... but you will probably end up cutting them anyway
to add some sort of fuel filters

You can build these assemblies much cheaper than buying them. So I’ll stick with that. (Mine is made already)But there would be no need for inline filters, the petcocks and carb banjos have filter screens. Plus my tank is extremely clean.

You can, but can you build it yourself and have it looking as good as that does?

Maybe... but probably not also.

Yes... I have the proper hose/ferrules/crimper... Kinda hard to take a good pic with them installed. but I'd be surprised if I have $20 including the spigots in the hoses.

I think you would have wanted to put the length from the tank to the rear ward mounted spigot, and the link pipe would be virtually a straight and shorter piece.

If you already have the right banjos and the tool then it’s a no brainier, I’ve made serveral over my time. The ones from Tricor look that bit better than what can be produced at home.

If you don’t have the tool or banjos, or you want to add a bit more to the level of detail from your build then I think the Tricor one is the way to go.