Carb sync

Information and questions on GL1200 Goldwings (1984-1987)
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Posts: 3
Joined: Sat Apr 17, 2021 7:46 pm
Location: Nisland, South Dakota
Motorcycle: 1985 Honda Asepencade gl1200

Carb sync

Post by Kennthheying »

I have a 85 Asepencade. It sat for 20 years. I clean the gas tank, new fuel filter, clean out the carbs. But I put in new jets a size a little bigger then what was in it. I reinstalled and got the front and back carbs sync but I can't not sync them side to side. I have max out a couple of set screws to get it there. I am wondering if I need to remove the carb again and put in smaller or the old jets. Any idea out there?

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'02 GL1800 lives in Dawsonville, GA now.
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Re: Carb sync

Post by AZgl1800 »

the Honda engineers are extremely bright people who experimented with 1,000s of ways to make those carbs efficient.

You just screwed up their work, go back to OEM jets, what was wrong with the original jets?
the hole is buried deep in the jet, I doubt seriously it is bad.

Make sure they are clean, and put them back in.

2009 Piaggio MP3 250cc
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Re: Carb sync

Post by Maz »

Carb sync is synchronising the amount of vacuum at each cylinder. Jet size won't affect this. When you sync the carbs, you are ensuring that each throttle plate is open the exact same amount and therefore the airflow through each carb Venturi is the same.
Ironically, Common Sense is the LEAST common of all senses!
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