GL 1100 IS THERE A HOLE IN THE IDLE JET?


Information and questions on GL1100 Goldwings (1980-1983)
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processing
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Motorcycle: Godlwing 1100 1980

GL 1100 IS THERE A HOLE IN THE IDLE JET?

Postby processing » Fri Apr 29, 2016 8:42 am



Hello everyone

Should there be such a small hole in along the logitudial axis in idle jets? My were pressed in. The wire is 0.2 mm (0.008 inch) See the Picture. Can even gas get through such tiny hole? Do you guys know what the inner diameter should be?

THANKS A LOT for answer.. i am in the proces to put them back in...

peter
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Re: GL 1100 IS THERE A HOLE IN THE IDLE JET?

Postby twocams » Fri Apr 29, 2016 10:48 am

The ones on my GL1200 are the same thing only different. But when held up to the sun ( when found ) I could see some type of screening inside on all 4. And that may be for better atomization of the gas :?: Or just my 67 yr old eyes playing games. :shock:

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processing
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Re: GL 1100 IS THERE A HOLE IN THE IDLE JET?

Postby processing » Fri Apr 29, 2016 1:01 pm

Thanks a lot.....i am going to install them back....was not sure.

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Re: GL 1100 IS THERE A HOLE IN THE IDLE JET?

Postby RBGERSON » Fri Apr 29, 2016 1:07 pm

there should be a hole/tube all the through and from side to side on all the side ports..it's very small most use a bristle from a wire brush or guitar sting to ream it out..should be clear no obstructions..
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

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Re: GL 1100 IS THERE A HOLE IN THE IDLE JET?

Postby processing » Fri Apr 29, 2016 1:55 pm

Thanks a lot guys. they are back in the carbs.....I still cant imagine how the gas gets in and do what it suppose to do... :?

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Re: GL 1100 IS THERE A HOLE IN THE IDLE JET?

Postby Old Fogey » Sun May 01, 2016 12:29 am

Like most folk, you are under the impression that it takes a lot of fuel to run an engine, so lets do some maths:

Some far cleverer people than me have calculated this out:
https://www.quora.com/How-much-gas-does ... ile-idling

Now, their figures are mainly for larger car engines idling at lower revs, but lets take their four cylinder Honda figure of 0.02 ltr/min for a 2 litre engine. So lets cut that in half for our GL1000 and add maybe 25% for the higher 1000rpm idling = 0.01125ltr/min or 11.25cc / min
So for 1 revolution now we want 11.25/1000 x60 = 0.0001875cc
But we have two cylinders firing every revolution so each cylinder at idle is consuming: 0.001875/2 = 0.0009375cc
Not easy to visualise that tiny amount but roughly a standard hens egg is 50cc, so you could ignite a cylinder over 5000 times with one fill.
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'Impossible' is just a level of difficulty! The only stupid question is the one you didn't ask first!

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Re: GL 1100 IS THERE A HOLE IN THE IDLE JET?

Postby processing » Mon May 02, 2016 6:04 am

Hello everyone and thanks everybody for applying and for helping me out.
I finally did my carbs the right way and she idles like a dream around 950 RPM. I did not do any vacuum check or pilot screw adjustments.All four cylinders are running great now (not the case before). Anyway I played with the bench sync and tried a new way (my way) by putting rather strong lightbulb inside the Plenum and shining light through the intake, on the butterflies. I started with carburetor number three and completely closed it so I didn't see any light. However when I dimmed the light in my garage I saw a tiny bit of lights coming around the butterfly thanks to imperfections in the intake and the flap itself. You would be surprise how precise this thing is! Plus you can guess rather precisely how much "volume" of flight comes through these imperfections even when fully closed. I played with it and then I did the same for carburetor number one and then four and two. comparing how she idled before she idles like a dream now. Just an alternative to the needle sync... and safer because you will not damage the butterflies.
by the way thanks to Old Fogey I felt confident about my idle jets and install them without any doubts.
Once again thanks to all for contributing and helping me out.
Peter, Czech Rep.




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