Mikuni Carbs

686 Views 5 Replies 4 Participants Last post by Randall-in-Mpls, Apr 20, 2022

TigerGordy

Discussion Starter · Apr 19, 2022

Hi,
I’m trying to get some technical information regarding the jetting specifications for Mikuni MV34 Carbs, which I would like to fit on my 1979 GL500E. Does anyone know the specs for the following;

main jet
pilot jet
needle jet
needle
throttle slide cutaway
main air jet

I know I can buy pre-jetted from Murray’s Carbs but I’m hoping to get them in the UK for around £177 each.

Regards Gordy

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SirFoxx

· #2 · Apr 19, 2022

TigerGordy said:
Hi,
I’m trying to get some technical information regarding the jetting specifications for Mikuni MV34 Carbs, which I would like to fit on my 1979 GL500E. Does anyone know the specs for the following;

main jet
pilot jet
needle jet
needle
throttle slide cutaway
main air jet

I know I can buy pre-jetted from Murray’s Carbs but I’m hoping to get them in the UK for around £177 each.

Regards Gordy

You're better off buying his kit. its pretuned, and a good chunk of the performance gains comes from the intakes. plus, he warranties his parts in case something is wrong with them, and will help you troubleshoot if you mess up an adjustment.

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Randall-in-Mpls

· #3 · Apr 19, 2022

TigerGordy said:
... which I would like to fit on my 1979 GL500E.

I'm pretty sure you don't have a '79 GL500E. If you're reading the number on the engine case, the "E" designates that as an engine serial number. The frame number will be different.
The GL500 (Silverwing) wasn't introduced until 1981, though in some markets the CX500 Standard was called "GL500 Wing." I don't know if that happened as early as 1979.
The CX500E "Eurosport" was introduced about the same time.
Compare your frame serial number to the list on motofaction.org to get a better idea what you have.

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TigerGordy

Discussion Starter · #4 · Apr 19, 2022

Randall-in-Mpls said:
I'm pretty sure you don't have a '79 GL500E. If you're reading the number on the engine case, the "E" designates that as an engine serial number. The frame number will be different.
The GL500 (Silverwing) wasn't introduced until 1981, though in some markets the CX500 Standard was called "GL500 Wing." I don't know if that happened as early as 1979.
The CX500E "Eurosport" was introduced about the same time.
Compare your frame serial number to the list on motofaction.org to get a better idea what you have.

Engine number is GL500E 1000552 Frame number is GL500 1004890 but still not sure what year according to motofaction.org I’m pretty sure the engine and frame come from different bikes.
Cheers!

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reclinedrelic

· #5 · Apr 19, 2022

From your avatar, if that is your bike, it looks to have a twin shock rear suspension rather than Pro-link. That would make it the CX500 derived GL500 Wing. Motofaction suggest a 1979 frame with a 1978 engine. It appearsto have reverse comstar wheels, another indication of a'79ish frame; the caveat being, many changes may have happened to the bike over the years.

GL500 Wing - Japanese Domestic Market CX500 variant information | MotoFaction.org

Looking for information on a Honda GL500 Wing, as opposed to the more common Silverwing? Find out more here!

motofaction.org

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Randall-in-Mpls

· #6 · Apr 20, 2022

Good info there. I hadn't realized that Honda had used the GL500 designation so early.
Gordy, it appears you have a Japanese market GL500 (not an "E"), likely with an engine swap some time before being taken to England.

P.S. Your serial number is several thousand higher than the highest reported on Motofaction.

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GL500 Wing - Japanese Domestic Market CX500 variant information | MotoFaction.org

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