Topic: Plugging up the tank cross over- cb350

[mikedialect]

I was wondering if anyone has gone through and closed off the tank cross over on a cb350 tank. I'm finally getting ready to start a project and I want to be able to take the tank off as needed without having to drain the damn thing every time.

Any thought?

[Gordon]

How about running a small in-line shut off valve on each side.  Then you could turn off the valves, pull off the hose in-between, and lift the tank off without having to drain it first.  If you plug up the crossovers, you'll have to physically slosh the fuel from one side to the other when the petcock side runs low. 

[mikedialect]

How about running a small in-line shut off valve on each side.  Then you could turn off the valves, pull off the hose in-between, and lift the tank off without having to drain it first.  If you plug up the crossovers, you'll have to physically slosh the fuel from one side to the other when the petcock side runs low. 

that's a pretty good idea!

[Raul CB750K1]

How about running a small in-line shut off valve on each side.  Then you could turn off the valves, pull off the hose in-between, and lift the tank off without having to drain it first.  If you plug up the crossovers, you'll have to physically slosh the fuel from one side to the other when the petcock side runs low. 

Better yet: use the crossover tube but split in two, and then connect them together with a piece of pipe -better yet with a brass connector with the lips for the tube, if you know what a mean. If you don't have a pipe you can use simply an inline fuel filter as a "connector"

You don't need the valves: just clamp the tubes before splitting them at the brass junction. If I'm not clear in my explanation just let me know. Have a look at this page.

http://louis9.louis.de/katalog2007/pages/809.pdf




Raul

[ProTeal55]

I took a piece of hose and connected the two outlets together, and tucked the tube inside the "lip" of the tank.

Problem solved..

[mikedialect]

I've used these quick disconnects for the crossover tubes.

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DG

Couldnt find those!

PT- I'm not entirely sure where you ran it, but I'm curious.

It's sounding like the better option is the quick disconnect do far. I'll have to give this a go and see how she works.

[crazypj]

quick disconnects are the way to go. running pipe over the frame just means that the fuel in one side can transfer to the other so you have to lay bike on ground to get full reserve capacity
PJ

[ProTeal55]

PT- I'm not entirely sure where you ran it, but I'm curious.

You can see in this pic the tank on my CB450 has alittle "lip" -->

This is where I shoved the crossover tube (right where the seat meets the tank)..

[Bodi]

I don't think tucking the tubes anywhere above the frame tube will work. Once the fuel level is below the highest point in the tubing, it can only flow fuel as a siphon. There's no way to exclude air from the nipples, especially when the fuel is sloshing around under acceleration and braking - the siphon will just fill with air and cease working. You may as well cap the nipples and use heavy braking occasionally to equalize the tank sides, with a bonus reserve available by tipping the bike way over towards the petcock.
The idea of splitting the tube and using a simple double ended nipple to join them - then clamping each side's tube before diconnecting them - seems the most practical if you want the crossover function and a way to remove a full tank with minmum spillage.

[ProTeal55]

A tube under the frame (thus having to remove it to get the tank off) is a poor design in my eyes.
My solution works fine for me becasue
1. I am anal about keeping my tank full
2. The bike is not used for long trips