Idle mixture screw settings


Information and questions on GL1100 Goldwings (1980-1983)
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Tipsy McStaggers
Posts: 30
Joined: Thu Jan 04, 2018 10:45 pm
Location: Atlanta, Ga.
Motorcycle: 1980 GL1100

Idle mixture screw settings

Post by Tipsy McStaggers » Mon Oct 01, 2018 9:26 am



Just got my bike back together after pulling the engine and replacing bad stator. I went ahead and replaced the timing belts and rebuilt the carbs. Had to replace the #1 carb with one off a 1982 rack after my easy out broke off in the low speed jet. I set all my mixture screws at 2 turns out according to clymer. It starts and runs with choke on but having trouble idling. After researching, it looks like the 1980 carbs should be set at 1.5 turns and the 1982 at 3 turns. It's back firing in the intake. The timing marks are all lined up, and it seemed that there was only one way for the ignition/pulse generator to go in, and it's getting spark at all cylinders(wish you could check timing on these bikes with a light). Got a idle mix tool on order. Would my current idle scew settings cause the rough idle and back fire?



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RBGERSON
Posts: 3201
Joined: Tue Mar 09, 2010 7:57 am
Location: SCOTTSDALE, AZ
Motorcycle: 98 SE GL 1500
had every year from 75 to 83

Re: Idle mixture screw settings

Post by RBGERSON » Tue Oct 02, 2018 8:36 am

Did you make sure you didn't loose the little pin that "sets" the pulse in the right position???
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

Tipsy McStaggers
Posts: 30
Joined: Thu Jan 04, 2018 10:45 pm
Location: Atlanta, Ga.
Motorcycle: 1980 GL1100

Re: Idle mixture screw settings

Post by Tipsy McStaggers » Tue Oct 02, 2018 9:02 am

Didn't notice a pin. Do you mean a woodruff key? It seemed to slot itself back in the same way it came out. Any pictures or diagrams I can refer to?

Tipsy McStaggers
Posts: 30
Joined: Thu Jan 04, 2018 10:45 pm
Location: Atlanta, Ga.
Motorcycle: 1980 GL1100

Re: Idle mixture screw settings

Post by Tipsy McStaggers » Tue Oct 02, 2018 9:27 am

Found a diagram. Do the pins frequently fall off the shaft when you disassemble? Are they pressed in or loose? It seemed to seat itself and not move side to side when I put it back together and the marks lined up the same at top dead.

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RBGERSON
Posts: 3201
Joined: Tue Mar 09, 2010 7:57 am
Location: SCOTTSDALE, AZ
Motorcycle: 98 SE GL 1500
had every year from 75 to 83

Re: Idle mixture screw settings

Post by RBGERSON » Wed Oct 03, 2018 7:27 am

Yes lots of people loose them and don't notice...
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

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Hoosier Jack
Posts: 412
Joined: Thu Oct 02, 2014 4:21 am
Location: Terre Haute, IN
Motorcycle: 1982 GL1100 Interstate

Re: Idle mixture screw settings

Post by Hoosier Jack » Fri Oct 05, 2018 7:06 am

Is this the pin you are talking about RB?


I broke mine reinstalling the PG and had to remove the motor again to fix. Here is a picture of how the set up should look like courtesy of IndianaKid.


The gap should be 12. My bike's timing is perfect now.

All this assumes the carbs are okay. Lot easier to yank them than pull a motor. Sadly for me, and my riding season, I've gotten good at it.

Tipsy McStaggers
Posts: 30
Joined: Thu Jan 04, 2018 10:45 pm
Location: Atlanta, Ga.
Motorcycle: 1980 GL1100

Re: Idle mixture screw settings

Post by Tipsy McStaggers » Fri Oct 05, 2018 7:38 am

Going to double check the pg this weekend. Will I be able to feel or see the pin when I pull the rotor? Hoping to leave the engine in and access the pg with battery box out. Also, do the 2 poles line up exactly at td1? Seems like they were a little offset. My idle mix tool came in yesterday, so will check pg and valve clearance and mess w/ the idle mix, and hopefully get carbs balanced and be back on the road.,,🤞

Tipsy McStaggers
Posts: 30
Joined: Thu Jan 04, 2018 10:45 pm
Location: Atlanta, Ga.
Motorcycle: 1980 GL1100

Re: Idle mixture screw settings

Post by Tipsy McStaggers » Fri Oct 05, 2018 1:57 pm

Hoosier, I'm pretty sure he was talking about the pin on the other side of the shaft that the rotor seats on.

Tipsy McStaggers
Posts: 30
Joined: Thu Jan 04, 2018 10:45 pm
Location: Atlanta, Ga.
Motorcycle: 1980 GL1100

Re: Idle mixture screw settings

Post by Tipsy McStaggers » Fri Oct 05, 2018 2:03 pm



.

Tipsy McStaggers
Posts: 30
Joined: Thu Jan 04, 2018 10:45 pm
Location: Atlanta, Ga.
Motorcycle: 1980 GL1100

Re: Idle mixture screw settings

Post by Tipsy McStaggers » Fri Oct 05, 2018 6:37 pm

I thought I read somewhere you could access the pg with the engine in the frame. Don't see how this is possible.

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Hoosier Jack
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Location: Terre Haute, IN
Motorcycle: 1982 GL1100 Interstate

Re: Idle mixture screw settings

Post by Hoosier Jack » Fri Oct 05, 2018 7:14 pm

Yeah that pin has to be right and the pin I'm referring to usually does not cause a problem. It did for me because I probably forced it in with a mall. I think that you can get to the PG by removing the wheel and swingarm, but I believe I was told that you would not be able to fix the thing. What's harder, doing that or pulling the motor? It is the re installation that is what is time consuming.

You can probably diagnose the problem by turning the PG if all of that stuff is off. And all it should do is just make the movement that it makes with the spring. I think if it spins around that something is wrong. I can't imagine how uncomfortable it would be to work on that under the fender.

I guess if you take the swingarm off it would be a good time to change the bearings. If you end up taking the motor out it may be a good thing to replace some of the starter clutch parts so you won't have to pull the motor again for that; or the stator if it is old.

I tell you one thing, that I wish I had never learned any of this.

Tipsy McStaggers
Posts: 30
Joined: Thu Jan 04, 2018 10:45 pm
Location: Atlanta, Ga.
Motorcycle: 1980 GL1100

Re: Idle mixture screw settings

Post by Tipsy McStaggers » Fri Oct 05, 2018 7:32 pm

I pulled the motor twice already. Had to replace stator. I'm 99% sure my pin didn't fall out since the rotor would only fit on the shaft one way and seated itself. Played with idle mix and balance, improved some still backfiring. Think I might have adjusted my valve clearance too tight.



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