Engine swap


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Rocky'sDad
Posts: 2
Joined: Thu Mar 12, 2020 8:01 pm
Location: Langley, WA USA
Motorcycle: 1980 Goldwing 1100 Interstate

Engine swap

Post by Rocky'sDad »



How much different in terms of size and mounting points is a GL 1100 engine vs. an 1800? I have the 1100 in a homemade trike and would love to have the reverse gear in the 1800.



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AZgl1800
Posts: 2338
Joined: Thu Oct 30, 2008 2:46 pm
Location: Lake Oologah Indian Territory USA
Motorcycle: '02 GL1800
2009 Piaggio MP3 250cc

Re: Engine swap

Post by AZgl1800 »

Rocky'sDad wrote:
Sat Aug 01, 2020 10:56 am
How much different in terms of size and mounting points is a GL 1100 engine vs. an 1800? I have the 1100 in a homemade trike and would love to have the reverse gear in the 1800.
unless you are building a trike from the ground up, and dispensing with the gl1100s frame, it is NOT going to fit, period.

the 1800's engine is part of the Frame on the gl1800 bikes.

and if you do manage to shovel the 1800 engine into a cage, you are now going to have to move all of the wiring harness from the 1800 to the new Experiment.

you will be mega bucks better off, buying a gl1800 and working with that.
~John

'02 GL1800
2009 Piaggio MP3 250cc

Rocky'sDad
Posts: 2
Joined: Thu Mar 12, 2020 8:01 pm
Location: Langley, WA USA
Motorcycle: 1980 Goldwing 1100 Interstate

Re: Engine swap

Post by Rocky'sDad »

OKay..the 1800 engine won't work as a swap for the 1980- GL1100 I have in my homemade reverse trike. Too bad...no reverse. How about the 1200 or 1500? Do they mount the same way and are they sized like the 1100? Short of an engine swap what really might need is a transmission as the engine itself runs well. Any ideas from the forum? Thanks.

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AZgl1800
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Location: Lake Oologah Indian Territory USA
Motorcycle: '02 GL1800
2009 Piaggio MP3 250cc

Re: Engine swap

Post by AZgl1800 »

the 1200s will work w/o too much effort.
well, a lot of time will be involved, but the engines are nearly the same size.

the 1500 is a flat six, and it at least does fit inside a frame and uses attachment points that you might be able to manage to work out. the SE models have Reverse.

the 1800 is a no go for you, unless you start from scratch.
~John

'02 GL1800
2009 Piaggio MP3 250cc

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minimac
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Location: Oswego, NY, Leesburg, Fl
Motorcycle: 1993 GL1500 Aspencade
2006 Yamaha Morphous
2011 Silverwing
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Re: Engine swap

Post by minimac »

AZgl1800 wrote:
Sat Aug 01, 2020 5:21 pm
the 1500 is a flat six......... the SE models have Reverse.
So does the Aspencade.

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blupupher
Posts: 55
Joined: Sun May 17, 2020 5:47 pm
Location: United States
Motorcycle: 1994 GL1500 SE

Re: Engine swap

Post by blupupher »

These bikes are nothing like cars where it is relatively easy to swap engines.

As said, the 1800 motor is basically a part of the frame, and needs to be the foundation of a homemade build, not a retrofit.

And same for other engines, while not a part of the frame, the size difference, mounting points and wiring needed between the 1100 and 1500 (the only other option for a Honda motor with reverse) makes it near impossible to do without major modifications, being easier, faster and cheaper to start over on a home build.
Can a 1500 fit into your 1100 trike? Yes. All you need is money, a motor, time, and fab skill.
Is it worth it? Only you can decide that.


1994 GL1500 Goldwing SE

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