Petrol pipe "X" pipe

newbuild100 · Mar 29, 2012

Has anyone run petrol pipe from the fuel tap straight down to that side carb, thus eliminating the cross over pipe at all. (The bit that runs under the airbox)

There are only minor potential problems as far as I can see.
1 . . Having to switch both taps to reserve relatively quickly,
2 . .A fuel tap becoming inoperable kills that side cylinder (ie, no fuel feed from the opposite side fuel tap). In 30 years of riding BM's, ive never had a fuel tap block up.

Ideas anyone ?

wreck diver · Mar 29, 2012

Why do you want to remove the link pipe :nenau

.
I cant recall ever seeing this done.

newbuild100 · Mar 29, 2012

Well, ive only thought about it cos the pipe in there is about to give up the ghost i think.

Doing the above is easier (for now) than raving the airbox out !!!

Kenny · Mar 29, 2012

Get the proper thinner fuel piping from one of the airhead suppliers and tape it tightly to the old pipe and simply pull it through :thumb2

If that fails, it is only a 10 minute job if you have to remove the airfilter ( three bolts ) anyway

(RIP) Proff · Mar 29, 2012

Don't do it..
Always run the link pipe.. :rob

You will find that when you are down to around 1/4 tank, one side will start getting fuel starvation, run lean and maybe burn valve out

Seen it happen

brassmonkey001 · Mar 29, 2012

You can run a fuel crossover pipe either over the top of the airbox or under the gearbox but you'll need to fit a pair of small 12v electric fuel pumps to keep the fuel under pressure to counteract the siphoning effect.

nick.ct · Mar 29, 2012

It is fairly easy to run a new fuel pipe under the airbox without removing it, 5 minute job.

1 Remove old pipe

2 Unwrap a metal coathanger and thread it through where the pipe is going to go

3 Guide the new fuel pipe over the coathanger from one side of the airbox to the other

4 When the fuel pipe reaches the opposite side just twist/ wiggle/push it through, guided by the coathanger

5 When the new fuel pipe is through, remove the coathanger, et voila

newbuild100 · Mar 29, 2012

Thanks for input guys.

Rob Farmer · Mar 30, 2012

To be honest it's such a simple job to loosen the airbox and fit a new pipe I can't understand why you wouldn't do it properly and just fit a new pipe.

cobbster · Mar 30, 2012

As Rob says

:beerjug:

tuftywhite · Mar 30, 2012

Kenny said:
Get the proper thinner fuel piping from one of the airhead suppliers and tape it tightly to the old pipe and simply pull it through.

That's what I did.

Petrol pipe "X" pipe

newbuild100

Well-known member

wreck diver

Well-known member

newbuild100

Well-known member

Kenny

Trustworthy Scouser AND

(RIP) Proff

25 Mar 1949 - 10 Nov 2016

brassmonkey001

I should change this

nick.ct

Well-known member

newbuild100

Well-known member

Rob Farmer

Well-known member

cobbster

Registered user

tuftywhite

getting away with it so far!

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