Running Rich 75 Wing. (I think)


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jeffk
Posts: 23
Joined: Fri Jul 03, 2015 8:27 am
Location: Michigan
Motorcycle: 1975 GL1000KO Goldwing, 1974 CB750K4, 1976 CB750A Hondamatic, Super Sport, 1983 CB1000C Custom

Running Rich 75 Wing. (I think)

Post by jeffk » Fri Dec 22, 2017 10:30 am



I recently rebuilt the carbs on my 75 wing. It seems to be running rich because I don't need hardly any choke to get it running when cold. Also it rides fine down the road but is a little hesitant when I get on the throttle. When I come to a stop the idle is unstable. Sometimes when I hit the throttle the RPMs will stay high and wont settle down. And other times it will be so low that it dies. I can get it running again with a twist of the throttle and it takes right off. Also there's a lot of smoke on the first start up when cold. I also resynced the carb and they are all synced pretty close to each other. What should my air jets be set at. Thanks.



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badandy
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Location: Weirton, West Virginia
Motorcycle: 1977 GL1000 Goldwing
1982 GL500I
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Re: Running Rich 75 Wing. (I think)

Post by badandy » Fri Dec 22, 2017 1:11 pm

Aftermarket kits for these carbs are hit and miss. Randakk has the best kit and only what you need. I have done two carbs with his kit with no issues.

Float measurement is critical to these carbs. If not at the right level you will have issues.

The pilot jets in these carbs are extremely small. You have to clean and blow them out and hold to a bright light source to make sure they are clean.

The vacuum pistons slides for the mains are critical too. They must be very clean and slide with no resistance. No oil! If they hang up you will have a rich condition. The caps on the covers are prone to cracking and will leak vacuum.

Pilot air screws should be set at 2 turns out to start from seated then adjusted for best idle. These are for idle mixture only.

Ignition problems can mimic carb problems too. Timing and points have to be right.

Blue smoke on start up is not unusual on these engines. Sitting on the side stand lets oil seep by the rings on the left side.

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virgilmobile
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Re: Running Rich 75 Wing. (I think)

Post by virgilmobile » Fri Dec 22, 2017 1:56 pm

Prove its running rich by turning off the gas.If it starts to settle down for a minute the gas level may indeed be too high.
I found on mine that the original black composition floats absorbed gas.This increased the fuel level.

jeffk
Posts: 23
Joined: Fri Jul 03, 2015 8:27 am
Location: Michigan
Motorcycle: 1975 GL1000KO Goldwing, 1974 CB750K4, 1976 CB750A Hondamatic, Super Sport, 1983 CB1000C Custom

Re: Running Rich 75 Wing. (I think)

Post by jeffk » Sun Dec 24, 2017 10:15 am

I attached a picture of my #1 plug from the left side so you can see the condition after a 20 mile ride. Also I am using D7EA a hotter than normal plug.
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jeffcosmo
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Location: Burlington, WI (Honey Lake)
Motorcycle: 1983 GL1100 Aspencade
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Re: Running Rich 75 Wing. (I think)

Post by jeffcosmo » Sun Dec 24, 2017 10:39 am

Weak coils imitate a rich mixture.

I rebuilt a carb twice, before smarter minds informed me better.

Cosmo

jeffk
Posts: 23
Joined: Fri Jul 03, 2015 8:27 am
Location: Michigan
Motorcycle: 1975 GL1000KO Goldwing, 1974 CB750K4, 1976 CB750A Hondamatic, Super Sport, 1983 CB1000C Custom

Re: Running Rich 75 Wing. (I think)

Post by jeffk » Sun Dec 24, 2017 10:55 am

Also what do you think of the Napco GL1000 carb kits from Jerrys cycle. They are 79.00 for 4.

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Fred Camper
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Location: Metro Detroit, MI
Motorcycle: 1977 GL1000, 1976 LTD GL1000

Re: Running Rich 75 Wing. (I think)

Post by Fred Camper » Sat Jan 06, 2018 11:46 pm

Randakk is not the cheapest but it is the one that puts the bike on the road fast. Lots of comparison completed and Randakks is the only one good for today's fuel.



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