ReJet carb help


Information and questions on GL1000 Goldwings (1975-1979)
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Jon750
Posts: 2
Joined: Sat Oct 01, 2022 10:35 pm
Location: United States
Motorcycle: 1978 Honda Goldwing GL1000

ReJet carb help

Post by Jon750 »



I have a 1978 GL1000 with a blown motor. I bought a 83 GL1100 engine to replace it with, but it didn't come with a carburetor. I have the carbs off the GL1000 I wanted to use, but I can't seem to find a jet size reference guide so I can rejet it. Would anyone know what sizes I'll need to go to? (Side note: I know the 83 runs a vacuum advance and the old carbs don't have the vacuum port for it. I took that into consideration and have a plan for it)


joecoolsuncle
Posts: 562
Joined: Sun Sep 26, 2021 6:10 am
Location: oxford, ar
Motorcycle: 1984 gl1200a

Re: ReJet carb help

Post by joecoolsuncle »

reference size is gonna be whatever oem is.
i see you gave a good geographical location in your profile, so that helps alot.
are the 1000 and 1100 carbs the same size? are the exhaust headpipes the same size?
Jon750
Posts: 2
Joined: Sat Oct 01, 2022 10:35 pm
Location: United States
Motorcycle: 1978 Honda Goldwing GL1000

Re: ReJet carb help

Post by Jon750 »

The carbs will mount to the engine the same way, people actually put GL1100 carbs on GL1000 engines, but I don't see much the other way around. Plus I'm not sure if the jet sizes are different between the two.
1983lux
Posts: 1
Joined: Tue May 15, 2012 8:34 pm
Location: Charlottetown, Prince Edward Island, Canada
Motorcycle: 1975 GL1000

Re: ReJet carb help

Post by 1983lux »

https://www.randakksblog.com/early-vs-l ... b-specs-2/

There’s some jetting info charts in there.

Randakk has a post about this, although mostly about putting gl1100 carbs on a gl1000. My bike had a 1979 engine with gl1100 carbs on it before I rebuilt my 1975 carbs and put the 75 cams on (my original engine threw a bearing)

I found it performed pretty good, but not as peppy in the high end. I’d expect 1000 carbs will work on the 1100, probably better if they are 78 or 79 carbs. But they won’t perform quite as good as 1100 carbs that are tuned for the bike.
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landisr
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Motorcycle: 1994 GL1500A 207k miles
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Re: ReJet carb help

Post by landisr »

1983lux wrote: Mon Oct 09, 2023 9:07 am https://www.randakksblog.com/early-vs-l ... b-specs-2/

There’s some jetting info charts in there.

Randakk has a post about this, although mostly about putting gl1100 carbs on a gl1000. My bike had a 1979 engine with gl1100 carbs on it before I rebuilt my 1975 carbs and put the 75 cams on (my original engine threw a bearing)

I found it performed pretty good, but not as peppy in the high end. I’d expect 1000 carbs will work on the 1100, probably better if they are 78 or 79 carbs. But they won’t perform quite as good as 1100 carbs that are tuned for the bike.
My understanding is that the OP is putting an 1100 engine in a gl1000.


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