Broken Float Post in Carb


Information and questions on GL1000 Goldwings (1975-1979)
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Liberaci
Posts: 11
Joined: Mon Aug 18, 2014 11:47 pm
Location: St. Andrews, Manitoba
Motorcycle: 1977 Gl1000

Broken Float Post in Carb

Postby Liberaci » Fri Apr 01, 2016 3:06 pm



I was wondering about how a broken float post may affect the carb operation.

I have a broken post in one of my carbs - I am thinking that is why i have a fouled plug on #1.

But just wondering about what exactly happens in the carb with this condition?

So...If the carb bowl fills with fuel, then the float raises and therefor stops gas entering into the carb body with the needle and seat closing.

Question: The post stops the float from falling down into the bottom of the fuel bowl. so, as long as there is fuel in that bowl, the float will not fall any further anyways, correct?

Obviously thee must be more to the float post function in the carbs.

If anyone can comment, That would be great.

I plan to get this fixed using the Randakk kit.

Thanks for your responses



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dingdong
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Re: Broken Float Post in Carb

Postby dingdong » Sat Apr 02, 2016 8:07 am

The float is there to maintain the proper metered fuel level in the carb bowls. Which is a very critical adjustment. Even a silly little millimeter either way will effect the fuel mixture. With a broken post there will be no way to keep the fuel set at the proper level as the float will wobble around. You have the right idea with the Randakk repair.
Tom

A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.

Liberaci
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Joined: Mon Aug 18, 2014 11:47 pm
Location: St. Andrews, Manitoba
Motorcycle: 1977 Gl1000

Re: Broken Float Post in Carb

Postby Liberaci » Sat Apr 02, 2016 8:16 am

Tom,

Really appreciate your response!

So, im thinking this must be why my #1 cylinder is fouling up?

I found a carb body replacement. Looks like I have a carb job to do this afternoon.

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dingdong
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Re: Broken Float Post in Carb

Postby dingdong » Sat Apr 02, 2016 1:05 pm

good luck with the repair.
Tom

A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.

Liberaci
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Joined: Mon Aug 18, 2014 11:47 pm
Location: St. Andrews, Manitoba
Motorcycle: 1977 Gl1000

Re: Broken Float Post in Carb

Postby Liberaci » Thu Apr 14, 2016 1:00 am

Hi Tom,

Quick update.

So, I pulled the carbs off. I am so dumb. I got the float bowls mixed up on #1 and #3. This means that I hooked the vacume line up to #3 instead of #1, that runs to the air cut off valve.

I still wanted to fix the broken post on carb #1. I found an entire set of carbs for a 77. while swapping out carb #1, something looked off. Turns out the previous owner decided to put 1979 carbs on this bike.

I was reading on Randakk's tips, that this was not a good idea. So, i overhauled the 77 set. just put them on the bike.

Have to wait till morning to hear it run. Battery went dead.

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Head
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Re: Broken Float Post in Carb

Postby Head » Sun May 01, 2016 3:45 pm

I was reading your post and made me think of this guy www.jmfmicroweld.com Here's a link from The SOHC forum, as I understand He does very nice work.

Liberaci
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Motorcycle: 1977 Gl1000

Re: Broken Float Post in Carb

Postby Liberaci » Wed May 04, 2016 9:25 pm

Hi Head Thanks for your response.

Thought I would do a quick update to this post:

I figured out that the Previous Owner switched the carbs - so I changed them back.

I purchased an entire set of carbs from a 1977. They were pretty ugly. I spent a considerable time cleaning these using Oxygen's step by step tips. (i think I got this at the NGW forum. Its so excellent that someone would put such effort into outlining this process with pictures and edits)

I also did the mods outlined by Randakk. the off Idle fix, and the washer in the CV needle. Im surprised that these little changes make such a difference.

I also put in a Dyna S ignition.

Presently the bike is running better than it has ever run since I owned it. I am almost happy.

One last glitch is the idle. Presently it hangs at 2000 rpm then it drops down to normal after awhile. I read on Randakks tips to check the battery.

I put in a brand new battery today - now it hangs intermittenly at 2000 for about 5 seconds then drops to normal.

Im pretty sure my carbs are sync'd

I think maybe its the springs on the advance mechanism for the Dyna S?

Or is a momentary hang time of 5 seconds abnormal? I cant remember if it did that with the last set of carbs. I wasn't paying attention.

I prefer to make it perfect, so I will keep reading!


Thanks everyone for your responses to my posts. This certainly helps my confidence with this project.

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spiralout
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Re: Broken Float Post in Carb

Postby spiralout » Thu May 05, 2016 10:03 am

Liberaci wrote: I spent a considerable time cleaning these using Oxygen's step by step tips.

I'm not sure who this Oxygen fella is but Octane has a good write up on them ;)

Liberaci
Posts: 11
Joined: Mon Aug 18, 2014 11:47 pm
Location: St. Andrews, Manitoba
Motorcycle: 1977 Gl1000

Re: Broken Float Post in Carb

Postby Liberaci » Fri May 06, 2016 12:10 pm

Did I say Oxygen? Geeez....maybe I need to take Oxygen?

Thanks for this correction!! Octane is the correct and most excellent reference!

motorcyclemedic
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Re: Broken Float Post in Carb

Postby motorcyclemedic » Fri Jun 03, 2016 5:31 am

recheck your butterfly linkages between each carb that link them together- a misplaced washer might be the cause of the idle problem- also, check the springs in the mechanical advance- if they are stretched, ignition will stay advanced, engine RPM will slowly creep down. read Randakks GL1000 tips- lotsa good info. Dennis in Anchorage Ak

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dingdong
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Re: Broken Float Post in Carb

Postby dingdong » Sat Jun 04, 2016 7:31 am

"pretty sure the carbs are synced". You might want to re-sync them. As this is a classic symptom. One of your slides could also be hanging up slightly. Did you polish them as specified in the how to thread? No this is not normal by any means.


Tom

A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.


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