fuel inlet question

My 71 cdo had a crossover pipe on the fuel line before the carbs, so the inlet banjos are single line. I'd like to have the crossover at the inlets instead and I see 3 options available as far as angle between the tubes. 65 150 or 180 degrees. Which will give the best angle for installing lines and avoiding kinks or leaks when everything is plumbed up??
Thanks

Mine are 180 's and work fine.

I also went to the later fuel line routing without the crossover line in front of the carb bowls (H pattern). This was changed by Norton around when the 850s came out for safety reasons. (Like when the flames come out of your blown head gasket joint!)

The original fuel lines on my '72 Combat are 5/16" ID. I have never been able to find a 180 degree Amal double banjo with 5/16" barbs. There is a metal 150 degree in 5/16" and that is what I'm using. It just makes it. I think many just use 1/4" line and the 180 degree banjos. From past threads it seems that there is adequate fuel flow to do this. The passages feeding the float bowl are smaller than that. I'm using the yellow Tyvek fuel line now and it is a little less than 5/16" ID but works fine. The yellow just looks like a well weathered clear hose. It is transparent enough to still see the fuel.

Have not looked at an 850 parts book but that would probably be a good place to start.

I have the 180 banjo's with clear line on my 75 850, work great. Old Brits has the line in clear for $74.25, black a little cheaper. I could not find the 180 banjos

http://www.oldbritts.com/13_604512.html

Yes its not a myth, if gasket, especially what is passed off as flamerings these days blows out at the oil drain weak spot > it directs flame jets directly on the fuel hose which can take that about 33 sec I found by pulling over at 28 sec, 5 sec after mind reviewed lit of what could happen if I just nursed the thing on to work 15 more miles... jet cuts into head, no problemo fixed that with JBW, discolor engine, no bigges scrubs right off, choke up the jugs, heads coming off anyway, fuel line in the way, YIKES!!! Its pretty rare as I've never heard of anyone else actually having this happen but even if it does, now ya know all ya's have to do is pull over in time. I could of nicked that thinned melted hose area open by a blunt finger nail.

I hope that was a typo on the Old britts fuel line cost at $74.25 ??
I use two triumph double banjo's that link together in the middle with about two inch's of fuel line then a seperate line up to the petcock with usually an in-line filter. The cost is about $5.00. Triumph banjo's about $10.00 each.


Tim_S

I'm not sure the OB price was a typo. They're pretty pricy, but from OB you can buy the clear line for a few bucks, the ferrules for pennies, you will have to crimp them somehow, some use twisted wire but I don't like that. I use my handy dandy Rigid flaring tool to crimp, but you can use a nut cut in half in a vice. The banjos are pricy, best place I found them was Amal, but then I was ordering the anodized slides, so that helped with shipping. I like the clear line, it turns blue from the avgas so it matches the paint.

Dave
69S

Trixie got along on the flame thinned factory hose assembly by putting couple layers of big shrink wrap around til I got around to replacing it for ~$60 a couple years ago. Peel was my ratter beater bike so just got cheap barbs and hose clamps but I like looking at the real deal on Trixie. No accounting for tastes but hose routing can matter.

You can buy these already made up. This one sells for around $50 (spendy but convenient). I've had mine now for about two years with no issues although the lines have turned yellow over time