1984 aspencade carb rebuild


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Asphalt guy
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1984 aspencade carb rebuild

Postby Asphalt guy » Mon Oct 01, 2012 5:28 pm



WHy am I only getting fuel to the left rear carburator now???? The bike will barely stay running. We ran it for about 5 minutes like this, and still no fuel to any other carb.! The fuel pump only squirts when turned over. I am about to loose my mind over this !



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Asphalt guy
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Re: 1984 aspencade carb rebuild

Postby Asphalt guy » Tue Oct 02, 2012 11:19 am

No one has rebuilt goldwing carbs and had a problem? WOW.

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feetup
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Re: 1984 aspencade carb rebuild

Postby feetup » Tue Oct 02, 2012 2:20 pm

I am assuming that you have the fuel lines hooked up correctly, and that the line from the fuel pump connects to the tee, which connects to the rear carbs. Also that the fuel connector pipes between the carbs have new "O" rings and are in the correct place, not mixed up with the air joint pipes.

If the above is correct, and you haven't mixed up the fuel joint pipes with the air joint pipes, the only possibility is that three of your fuel needles are stuck or adjusted very wrong.

The fuel gallery in the carbs flows right through from one side to the other in the rear carbs so at least the two on the same side should be getting fuel if all your plumbing is correct.

Did you put the carbs back in the same place they came from?

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Asphalt guy
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Re: 1984 aspencade carb rebuild

Postby Asphalt guy » Tue Oct 02, 2012 3:54 pm

Thank you for the response! The guy who is doing this has worked on wings forever, but this is his first carb rebuild. He didn't want to mess with the bladders. We took one cover ov to check things, seemed in working order.

As far as the plumbing goes, I'll have to make sure it is correct. I didn't take it apart, but I'm pretty sure this guy knows what he's doing. After some reading, I found that the floats need to be adjusted to 7mm. I know we did not do this. We just put the new parts in and made sure the float moved freely. Does vacume have anything to do with the other carbs filling up?

I might also add that the carbs had a sandy like grit in them after our test run, so a little fuel made it into them but not enough for the cylinder to even fire. We are going to flush the tanl, ans system. Starting fresh with zero chance of dirt this time. Is there a way to prime the carbs? Or should they have no problem filling them up by itself? Again thank you sir for the reply! ANY other advice would be greatly appreciated!!

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Asphalt guy
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Re: 1984 aspencade carb rebuild

Postby Asphalt guy » Tue Oct 02, 2012 3:55 pm

I'm pretty sure he put them back where they came from. He did one side connected to the intake.

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Re: 1984 aspencade carb rebuild

Postby virgilmobile » Tue Oct 02, 2012 3:57 pm

And it is normal to only have fuel 'squirt' with the engine turning over.It has a control circuit that is triggered by the ignition system.Usually a 5-8 second crank is enough to get some fuel into the carbs.

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trukr
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Re: 1984 aspencade carb rebuild

Postby trukr » Tue Oct 02, 2012 10:32 pm

You said it had a gritty film in the carbs? Just my two cents but you may have to clean your fuel system again, as it doesn't take much to plug some of the tiny passages in these carburetors. And yes it is normal to have the fuel pump only pump while the engine is turning over.

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Asphalt guy
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Re: 1984 aspencade carb rebuild

Postby Asphalt guy » Thu Oct 04, 2012 6:27 am

Emptieed the tank, cleaned it out. New fule lines, adjusted the floats , ans still only fuel to the left rear carb??? This is killing me!

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Re: 1984 aspencade carb rebuild

Postby virgilmobile » Thu Oct 04, 2012 6:56 am

When you adjusted the floats did you blow air into the fuel line to verify each one is open to bowl?
Each needle valve seat should have a microscreen filter under it.

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Asphalt guy
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Re: 1984 aspencade carb rebuild

Postby Asphalt guy » Thu Oct 04, 2012 12:57 pm

We didn't blow on anything. The new screens came with the rebuild kit. After cleaning the gas tank, the fuel pump seems weak. I wonder if I got somthing stuck in it? But When the fuel pump was stronger, it did the exact same thing. Anyone near Lima Ohio? lol I think we are going to try to bottle feed each carb to see if tht helps prime the system?? Or would that be a waste of time. This is becoming a real pain. I really don't kn ow what else to try.

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Re: 1984 aspencade carb rebuild

Postby Asphalt guy » Thu Oct 04, 2012 12:59 pm

I just got what you meant by microscreen under the float needle. i'll have to check on this!! thanks!

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virgilmobile
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Re: 1984 aspencade carb rebuild

Postby virgilmobile » Thu Oct 04, 2012 1:13 pm

When i serviced my carbs,I used a syringe and pushed plenty of gas into the carbs.I then drained each bowl to see if each had the same amount in them.My verification that the floats were equal.
So yes you can bottle feed each bank and then drain each one to see.
Take pictures of what you find and keep us posted.
I also used a shop vac on each carb to test the slide action.Might as well if there off the bike.

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Asphalt guy
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Re: 1984 aspencade carb rebuild

Postby Asphalt guy » Fri Oct 05, 2012 10:14 am

Thanks alot! I hope this tells us somthing! I jut don't understand why only 1 carb is getting fuel. If that carb is set to low, my guess it will not flow to the other carb? I'll try to get some pics.

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Re: 1984 aspencade carb rebuild

Postby feetup » Fri Oct 05, 2012 10:46 am

Both the rear carbs receive fuel from the rubber fuel lines which are connected to the tee, which is then connected to the fuel pump.
Follow the lines: From the tank to the inlet of the fuel pump. From the outlet of the pump to the tee and then to carbs 3 and 4.

If that is as it should be then you have to check for blockages in the lines and carbs. As VirgilMobile says there is a tiny screen that is under each seat of the float valves which could be blocked up, and that could prevent the flow of fuel.

I have seen fuel systems filled with all kinds of nasty stuff from crystals to sand to green jelly that would block the flow of fuel.
These fuel pumps do not deliver enough pressure to blow out any junk from the lines or they would overpower the float valves and flood the carbs.
If there is grit in your system you need to get it out, and you need to find out where it is coming from from. You say that you cleaned the carbs, and then found grit in them later so it is coming from somewhere. What is the condition of the fuel filter? How clean is your fuel tank?
It would be a good idea to disconnect the fuel pump outlet hose from the tee and place the end of it in a container, then turn the kill switch off and crank the engine briefly to see what kind of delivery your fuel pump is giving. Be careful though, this could be a fire hazard since you will have open fuel. Once the pump begins to operate you will have to turn the key off to stop it.

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Asphalt guy
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Re: 1984 aspencade carb rebuild

Postby Asphalt guy » Fri Oct 05, 2012 3:23 pm

Thank you so much! We did disconnect the outlet from the pump, and cranked. It didn't seem like it was as strong as it ws prior to draining out the fuel tank and cleaning it out. The tank was not in that bad of shape. Just a little crusty at the bottom beside the line for the pick up tube. I vacumed everything I could out then wiped it down with a rag, swept again, and it looks great now. I replaced the inline filter also.

As far as the fuel pump goes....Mine will only pump when the motor is being cranked over. So, you are telling me that after cranking for a few seconds it should run steady from the outlet?? And how long to you have to crank, before this happens? BTW, all of the fuel lines were also replaced.

We adjusted the floats to 9mm I think Because the 7.5 mm would not actuate the valve. Would this cause the fuel not to get to the other carbs????

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virgilmobile
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Re: 1984 aspencade carb rebuild

Postby virgilmobile » Tue Oct 09, 2012 10:48 am

The pump is energized by a control relay.It operates only when the engine has spark.
The float level is specific.Changing it even a little can affect the fuel level.
Set it "by the book".




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