fuel tank question

[steve0913]

I recently removed my fuel tank and under my tank is 2 vacuum lines, I know the one on the front is a over spillage drain tube, but is the one on the rear of the tank supposed to go somewhere or is it a drain tube also?bikes been running a little rough and was wandering is this a vaccum line I accidently unpluged

[macmac]

None of them are vacuum lines. On a Not Cali bike there front one is a rain water drain, for the well at the locking cap. It drains rain water away from the cap area which is inset making a water trap. If it didn't drain when you stood the bike up you would wet yer pants with rain water. We just can't have that look see!

The other tubing line on a non cali bike is a fuel drain for if you over fill the bike and the one hose there runs by the oil filter and dumps too much gas on the ground...

A Cali bike has 3 fittings and no vac line either. The forward one is for rain just like any other tank, but the rear 2 are for fuel vapors. One is for a over fill which had best not happen.
The other pushes fuel vapors back into the tank.

Running rough could be a maybe vac leak, but not from the tank, since there is not one vac line to the tank on any models.

The most likey reason there is any roughness might be the throttle body needs a good cleaning, and or the oil is used up if you missed changing it on time, and or other reasons.

What does rough running mean to you?

[macmac]

I got you post mixed up with another. You didn't ask a thing about cali model tanks, but the info still applies.

[Yellow Jacket]

The hose at the front is called the "Fuel Tank Water Drain Hose." It drains water or spilled fuel from the depression around the filler cap.

The hose at the rear is called the "Fuel Tank Breather Hose. (Except Califonia Model)."

This hose routes down and ends just to the rear of the oil filter.

On the California model I believe this rear hose goes to the vapor recovery cannister located behind the left side cover.

P.S. Mac types faster than me!

[macmac]

Bob, I use 2 fingers and hunt and peck, but fast... Maybe 45 wpm.. The cali model has 2 rear hoses one to the valving that runs the canister and the other a return to the tank.

I forget since i didn't set out to remember the 1 cal bike i did the caddman, medusa head, RH exhaust, Chucks Coasters, which is which.

On the cali bike one fitting is left with a hose to drain and the return gets capped off.

Eattin' lunch then finishing up the Jeep project, so am not going to crack a book just now.

[Yellow Jacket]

Check out this post for information about the fuel tanks, both CA and non-CA:

http://www.vulcanbagger.com/phpBB3/v...ic.php?t=11307