GL 1000 carbs fit 750


Information and questions on GL1000 Goldwings (1975-1979)
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NoWings
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Motorcycle: 1977 GL1000

GL 1000 carbs fit 750

Post by NoWings »



Wondering if carbs interchange. 1977 GL1000 carburators on a 1983 750? I know they are jetted different but will they physically bolt on?


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Fred Camper
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Re: GL 1000 carbs fit 750

Post by Fred Camper »

They are a very different configuration and the 750 carbs are solid and very common. Does not seem to be worth the effort. Way easier to buy a nice set of 750 carbs. Note I have never tried this for sure.
NoWings
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Re: GL 1000 carbs fit 750

Post by NoWings »

750 is a magna, If that makes any difference. As you can already tell, I know zero about motorcycles. I am trying to learn. I read somewhere carburator will interchange from 76-83 but in similar displacement engines. I am not completely ignorant when it comes to IC engines. The nature of my inquiry is as follows...

There is this fuel called E85. It takes 30% more of this fuel than gasoline to run any given engine. I work on my turbocharged cars and truck. I can easily use a calculator to find what size injector I need to upgrade to.

By this reasoning, I have deduced that if the 1000 carbs physically fit on the 750 intake (port marching?) Then I get about 25% more flow. This is close to provide the extra fuel I need to run the 750 on E85. I came to these numbers by using this equation which may or may not be accurate. ..

750 / 1000 = .25

Why would I want to run E85? 103 octane rating.
The 750 has a higher static compression ratio that the older 1000 and this would help it in the performance department.
Why not get a bigger bike if I want performance? I could. I'm just wanting to further my knowledge and possibly get more performance from a max'ed out engine said to already be tuned to its optimal output.
Thanks for taking the time to educate me.
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SnoBrdr
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Re: GL 1000 carbs fit 750

Post by SnoBrdr »

After looking at the carbs for a 750 Magna I can't see how they would ever fit on a GL.

But as someone once said, if you give me a blank check, I can do anything you want.
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detdrbuzzard
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Re: GL 1000 carbs fit 750

Post by detdrbuzzard »

e85 might give you a higher octane than regular or even premium gas but the btu content is less so you'll be loosing hp not gaining hp. you'll also loose mpg
'99 ST1100, '93 se
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.... william
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Maz
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Motorcycle: 1975 GL1000K1
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Re: GL 1000 carbs fit 750

Post by Maz »

NoWings wrote:750 is a magna, If that makes any difference. As you can already tell, I know zero about motorcycles. I am trying to learn. I read somewhere carburator will interchange from 76-83 but in similar displacement engines. I am not completely ignorant when it comes to IC engines. The nature of my inquiry is as follows...

There is this fuel called E85. It takes 30% more of this fuel than gasoline to run any given engine. I work on my turbocharged cars and truck. I can easily use a calculator to find what size injector I need to upgrade to.

By this reasoning, I have deduced that if the 1000 carbs physically fit on the 750 intake (port marching?) Then I get about 25% more flow. This is close to provide the extra fuel I need to run the 750 on E85. I came to these numbers by using this equation which may or may not be accurate. ..

750 / 1000 = .25

Why would I want to run E85? 103 octane rating.
The 750 has a higher static compression ratio that the older 1000 and this would help it in the performance department.
Why not get a bigger bike if I want performance? I could. I'm just wanting to further my knowledge and possibly get more performance from a max'ed out engine said to already be tuned to its optimal output.
Thanks for taking the time to educate me.
The carbs won't fit and the basic "equation" is wrong. Why not try fitting a turbo?
Maz
Ironically, Common Sense is the LEAST common of all senses!
NoWings
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Location: Permian Basin
Motorcycle: 1977 GL1000

Re: GL 1000 carbs fit 750

Post by NoWings »

Turbo requires timing curve and fuel control for starters. Fitting a turbo and plumbing it or fitting larger carburators by making a new intake is about the same type of work. I don't know what kind of pressure the heads and blocks can withstand before they blow up from under my crotch. I'd would also have to do alcohol injection with turbo which is another project itself. Pass on turbo.
You are correct about the equation. I should be comparing apples to apples for flow. It was just an example.
You are correct about the equation. I should be comparing apples to apples.
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SnoBrdr
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Re: GL 1000 carbs fit 750

Post by SnoBrdr »

NoWings wrote:Turbo requires timing curve and fuel control for starters. Fitting a turbo and plumbing it or fitting larger carburators by making a new intake is about the same type of work. I don't know what kind of pressure the heads and blocks can withstand before they blow up from under my crotch. I'd would also have to do alcohol injection with turbo which is another project itself. Pass on turbo.
You are correct about the equation. I should be comparing apples to apples for flow. It was just an example.
You are correct about the equation. I should be comparing apples to apples.
If you really want to go crazy: http://randakks.com/products/supercharg ... -or-gl1100

He's probably the world's greatest authority on all things GL1000 related.
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Maz
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1993 Suzuki GS500E

Re: GL 1000 carbs fit 750

Post by Maz »

NoWings wrote:Turbo requires timing curve and fuel control for starters. Fitting a turbo and plumbing it or fitting larger carburators by making a new intake is about the same type of work. I don't know what kind of pressure the heads and blocks can withstand before they blow up from under my crotch. I'd would also have to do alcohol injection with turbo which is another project itself. Pass on turbo.
You are correct about the equation. I should be comparing apples to apples for flow. It was just an example.
You are correct about the equation. I should be comparing apples to apples.
Ultimately, the answer to your original question is no, they won't fit. The GL carbs have very different castings. What about a set from a CB900 or CB1100? Both motors are inline 4 cylinders and virtually identical to the 750. It might be worth asking the question on the "CB750's" site. They are a great bunch of guys and as knowledgeable about the CB750 as these guys are about 'wings.
Maz
Ironically, Common Sense is the LEAST common of all senses!
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Maz
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1993 Suzuki GS500E

Re: GL 1000 carbs fit 750

Post by Maz »

Maz wrote:
NoWings wrote:Turbo requires timing curve and fuel control for starters. Fitting a turbo and plumbing it or fitting larger carburators by making a new intake is about the same type of work. I don't know what kind of pressure the heads and blocks can withstand before they blow up from under my crotch. I'd would also have to do alcohol injection with turbo which is another project itself. Pass on turbo.
You are correct about the equation. I should be comparing apples to apples for flow. It was just an example.
You are correct about the equation. I should be comparing apples to apples.
Ultimately, the answer to your original question is no, they won't fit. The GL carbs have very different castings. What about a set from a CB900 or CB1100? Both motors are inline 4 cylinders and virtually identical to the 750. It might be worth asking the question on the "CB750's" site. They are a great bunch of guys and as knowledgeable about the CB750 as these guys are about 'wings.
Maz
Apologies... Scrap that idea. I just noticed you mentioned "MAGNA" . That's a V4 not inline4 so they may not be able to help.
Maz
Ironically, Common Sense is the LEAST common of all senses!
NoWings
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Location: Permian Basin
Motorcycle: 1977 GL1000

Re: GL 1000 carbs fit 750

Post by NoWings »

Maz wrote:
NoWings wrote:Turbo requires timing curve and fuel control for starters. Fitting a turbo and plumbing it or fitting larger carburators by making a new intake is about the same type of work. I don't know what kind of pressure the heads and blocks can withstand before they blow up from under my crotch. I'd would also have to do alcohol injection with turbo which is another project itself. Pass on turbo.
You are correct about the equation. I should be comparing apples to apples for flow. It was just an example.
You are correct about the equation. I should be comparing apples to apples.
Ultimately, the answer to your original question is no, they won't fit. The GL carbs have very different castings. What about a set from a CB900 or CB1100? Both motors are inline 4 cylinders and virtually identical to the 750. It might be worth asking the question on the "CB750's" site. They are a great bunch of guys and as knowledgeable about the CB750 as these guys are about 'wings.
Maz
Thank you. That's information I was after.
NoWings
Posts: 31
Joined: Fri Dec 09, 2016 8:48 am
Location: Permian Basin
Motorcycle: 1977 GL1000

Re: GL 1000 carbs fit 750

Post by NoWings »

SnoBrdr wrote:
NoWings wrote:Turbo requires timing curve and fuel control for starters. Fitting a turbo and plumbing it or fitting larger carburators by making a new intake is about the same type of work. I don't know what kind of pressure the heads and blocks can withstand before they blow up from under my crotch. I'd would also have to do alcohol injection with turbo which is another project itself. Pass on turbo.
You are correct about the equation. I should be comparing apples to apples for flow. It was just an example.
You are correct about the equation. I should be comparing apples to apples.
If you really want to go crazy: http://randakks.com/products/supercharg ... -or-gl1100

He's probably the world's greatest authority on all things GL1000 related.
If and when I go crazy, I'll go all Tesla on it.
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spiralout
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Motorcycle: 1975 GL1000 (gone)
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Re: GL 1000 carbs fit 750

Post by spiralout »

Trying to find a use for those carbs that you'll no longer need on the electric GL1000, I see ;) ;)
NoWings
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Re: GL 1000 carbs fit 750

Post by NoWings »

Yes sir. Although, they are in the classified section.


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