Carbs pouring gas!

[kbruce6057]

I have been riding my bike for 2 weeks since getting her going. I had some vacation time so went out of town for three days, yesterday I started her up to go to work and it started pouring gas out of the carbs when it was running. They stop when I shut it down. I tried the tapping of the bowls in case floats needed a little help. The carbs have been cleaned, rejetted, needles raised. New Petcock. It ran fine for 2 weeks! Any help or advise would be greatly appreciated. Oh, It's a 1982 Gs850GL.

Steve

[TwistedRoads]

did you check petcock and make sure it isn't in prime?

[kbruce6057]

did you check petcock and make sure it isn't in prime?

Yes I haven't moved it since getting the bike going. I think if it was on prime gas would continue to flow even if the bike was not running. I have no gas flowing while not running.

[Dogma]

It sounds like the petcock is shutting off the fuel like it should, but one of the floats isn't closing a needle valve, or is just plain stuck open.

[Nessism]

It sounds like the petcock is shutting off the fuel like it should, but one of the floats isn't closing a needle valve, or is just plain stuck open.

Agree. Maybe crud in the tank is contaminating your clean carbs?

[chuckycheese]

Needles

Why were the needles raised?? Sounds like there's more to the story in order to figure it out.

[SqDancerLynn1]

Did you replace he float needle O rings

[chef1366]

Did you replace he float needle O rings

Ditto
And are you sure you don't have rust in the tank?

[jonshep]

I have had the same problem. A float is sticking or the needle is not seating properly. Pet cock is working correctly. Trash in the gas will cause this problem (tank rust, bad gas, sand in the gas, etc.). Gas stations have trash problems and the guy in front of you may have dropped the hose in the dirt. Float levels may be set to high...you get the picture. It's a pain in the butt, but not serious. While not fool proof, install a fuel filter in the gas line, it will help.

[robertbarr]

Your petcock is doing its job. The sudden onset of this suggests crap from the tank getting lodged in the inlet seat.

[kbruce6057]

Thanks for all the suggestions, and comments. I will remove carbs clean them and check the tank for any rust again! I am pretty sure its the seats. Probably need to do tank treatment as well. Thanks again.

Steve

[Steve]

While not fool proof, install a fuel filter in the gas line, it will help.

Yeah, it will help, but only if you get the right filter.

If you get a standard automotive-type paper filter, it won't work. It takes a bit of pressure to get the fuel through the paper, and the only pump on our bikes is gravity. The small drop from the tank to the carbs is not enough to get fuel through the filter. Your best bet is to get a filter with a bronze stone in it that is designed for a lawn tractor. You can find them for just a few bucks at your local home improvement Big-Box store.

.

[kbruce6057]

Yeah, it will help, but only if you get the right filter.

If you get a standard automotive-type paper filter, it won't work. It takes a bit of pressure to get the fuel through the paper, and the only pump on our bikes is gravity. The small drop from the tank to the carbs is not enough to get fuel through the filter. Your best bet is to get a filter with a bronze stone in it that is designed for a lawn tractor. You can find them for just a few bucks at your local home improvement Big-Box store.

.

Yes, thanks. I wanted to ask that question earlier, and have heard about a certain type of filter for these bikes. Thanks for the info.