No fuel to #2#3#4 cylinder.

[Hillrod]

Bike: 81 GS850g-chop/bob/ratbike/whatever...

Hello. I am just finishing my gs 850 chopper and I have a few problems. First off the bike will start and run but only on the number 1 cylinder. All the barbs are getting fuel to the float bowl just not into the cylinder. The bike will run nicley on starting fluid on all cylinders. also my new tank does noit have the vacuum port on the petcock so how should I go about taking care of that. Do I need the vacuum from the carb to the tank?

[Guest]

Need a pic of the petcock. Aftermarket? Broken stock?

The fuel is not getting past the float needle and seat or your jets and ports are clogged with old gas.
Or you petcock is toast?

[Big T]

The vacuum is from the carbs to the petcock, do you have the hoses hooked up correctly?

[Hillrod]

I only have the fuel feeed hooked up because the petcock on the new tan only has 1 port for fuel no vacuum. I cleaned them but maybe take them apart and clean them agasin I guess. ALL the needles where stuck, ALL the floats were stuck.

[Hillrod]

No one has anyother ideas?

[Guest]

Two things allow fuel into the bowls. Petcock, float seat and needle. I covered both.
Three if you count gravity.

[mike_of_bbg]

Did you dip the carbs per the GSR instructions?

Since you're not using a vacuum petcock, make sure you plug the vacuum port on the #2 carb. Else you'll be sucking in a lot of air and no fuel there. That might get you running on 2 out of 4. Are all of your sync ports plugged up tight and your boots in good shape?

[Hillrod]

Two things allow fuel into the bowls. Petcock, float seat and needle. I covered both.
Three if you count gravity.

There is fuel in the float bowl.

Did you dip the carbs per the GSR instructions? Umm I guess I have to search and find that one.....

Since you're not using a vacuum petcock, make sure you plug the vacuum port on the #2 carb. Else you'll be sucking in a lot of air and no fuel there. That might get you running on 2 out of 4. Are all of your sync ports plugged up tight and your boots in good shape?

Im going to pull it back apart today and see what I am working with.

Thanks again for the help

[Hillrod]

Okay I followed the complete clean jsut like on nthe basscliff sight on the carbs. Onlty thing is that the guy before me stripped out the pilot jets on the 2 and 3 carbs. I put it together and fired her up and she starts and idles great on 3 and 4 for but just pumps air out of the 1 and 2 until you ounch the throttle then it will stumble and then GO! on all 4. with the choke on it will either start shooting flames out of the number 1 head pipe blow air out of 2 and run alright on 3 and 4. Also the air box soes not have a good seal on the boots into the box. The boots are pretty much ruined and dont fit into the box at all really. What ya think now?
OH! i kept soakeing and spraying through the pilot jets until I got them to flow through the same holes that the clean ones did.

[Guest]

Fix the airbox or jet for pods.
Sync the carbs.

[Big T]

Get some new airbox boots

How are the boots between the carbs and the head?

Did you replace the O rings?

Did you plug the vacuum port on #2?

[Hillrod]

I bench synched the carbs already. Rejetting isnt and optin because I can not get the pilot jets out of 2 an 3 or I would do that.

[Guest]

The only thing I use an Easy Out is for pilot jets.
Use heat and PJ Blaster and they will come out.

[Steve]

I bench synched the carbs already. Rejetting isnt and optin because I can not get the pilot jets out of 2 an 3 or I would do that.

Most times, you don't need to change the pilot jets. You will need to change the main jets up a few sizes, turn the mixture screws out a bit and maybe shim the needles, but most often, you don't have to change the pilots.

.

[Hillrod]

Okay so I will sttempt to remove the air screws and the pilot jets again today. What would cause the cylinders to not idle. Isnt that the mixture screw. Then the pilot jet takes you up to 1/4 throttle and the main the rest? Man what a headache, I just cant wait to get it runnin good.
Also I found a jet kit on ebay that will work with your specs to make jets. Has a lot of good feedback so I might give em a shot.