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Author Topic: GS1100 Swing arm, to CB750?  (Read 8454 times)

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james1300

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GS1100 Swing arm, to CB750?
« on: January 23, 2009, 09:09:14 PM »
Has anyone adapted a Suzuki Early '80's GS1100 boxed aluminum swing arm to their CB750?
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Offline bwaller

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Re: GS1100 Swing arm, to CB750?
« Reply #1 on: January 24, 2009, 06:41:27 AM »
Here's a chance for you to break the ice James. Just post pics!  ;)
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Offline MCRider

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Re: GS1100 Swing arm, to CB750?
« Reply #2 on: January 24, 2009, 08:25:32 AM »
Quote from: james1300 on January 23, 2009, 09:09:14 PM
Has anyone adapted a Suzuki Early '80's GS1100 boxed aluminum swing arm to their CB750?
There have been many threads here about such things. I have gleaned that the GS series swingarms are doable. 750,1000,1100. diferrences in length and width, but the pivot point works. Oh yeah, you have to do something about shock mounts.

piece of cake for a good welder.
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Offline 754

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Re: GS1100 Swing arm, to CB750?
« Reply #3 on: January 24, 2009, 10:16:20 AM »
1080 picked up one that looks like it will work.. off i think 80 or so GS 1000 or 1100

He will post some pics soon, it has the correct type shock mounts and is 3 inches longer... nice arm..
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Offline Retro Rocket

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Re: GS1100 Swing arm, to CB750?
« Reply #4 on: January 24, 2009, 05:14:05 PM »
This is a modified GSXR 1100J swingarm in my K4, apart from removing the monoshock and shortening the arm, it bolted straight in.


If you like i will take some more pics when i take it out for polishing.

Mick
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Offline 1080

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Re: GS1100 Swing arm, to CB750?
« Reply #5 on: January 24, 2009, 07:37:23 PM »
Here's the aluminum Katana? swingarm I will be using on my '77 Custom.
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Offline 1080

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Re: GS1100 Swing arm, to CB750?
« Reply #6 on: January 24, 2009, 07:42:22 PM »
Swingarm placed upside down in frame to give a rough idea on clearance.
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Offline 1080

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Re: GS1100 Swing arm, to CB750?
« Reply #7 on: January 24, 2009, 07:50:01 PM »
Pre 77 swingarm (first picture ).

CB900F swingarm.

'77 with CB900F Front end ( mock up only ).
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Offline Retro Rocket

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Re: GS1100 Swing arm, to CB750?
« Reply #8 on: January 24, 2009, 08:08:59 PM »
I also used a GSXR 1100 K front end. The interesting thing was that the atandard Honda steering stem pressed straight into the GSXR triple clamps.


Mick
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If You can't fix it with a hammer, You've got an electrical problem.

Offline Badluckhonda

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Re: GS1100 Swing arm, to CB750?
« Reply #9 on: April 20, 2015, 10:32:24 PM »
1080, how much longer is that alloy katana swingarm ?
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Offline Retro Rocket

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Re: GS1100 Swing arm, to CB750?
« Reply #10 on: April 21, 2015, 02:12:58 AM »
Quote from: Badluckhonda on April 20, 2015, 10:32:24 PM
1080, how much longer is that alloy katana swingarm ?

I have one right in front of me now, from the center of the pivot bolt on the GS1100 arm, to the start of the chain adjuster slot is exactly 500mm, so its roughly 100mm {4 inches} longer. I'm having one cut down at the pivot end for one of my 750's ,1 inch longer than stock, its also about 18mm wider at the shock mounts, so the shock mounts on the frame need reworking to suit...
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Offline faux fiddy

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Re: GS1100 Swing arm, to CB750?
« Reply #11 on: April 21, 2015, 02:37:39 AM »
Quote from: Retro Rocket on January 24, 2009, 08:08:59 PM
I also used a GSXR 1100 K front end. The interesting thing was that the atandard Honda steering stem pressed straight into the GSXR triple clamps.


Mick

Nice swap. 8)  I was  told that in general Yamaha was  lucky with fitment over any others, but I guess machinists do whatever they want on stuff. Pressing it in and if fits is as good as it gets.
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Offline Badluckhonda

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Re: GS1100 Swing arm, to CB750?
« Reply #12 on: April 21, 2015, 09:14:23 AM »
Rocket the swinger 1080 has in the
I tires above does not seem that much longer ?
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Offline Retro Rocket

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Re: GS1100 Swing arm, to CB750?
« Reply #13 on: April 21, 2015, 03:01:55 PM »
Quote from: Badluckhonda on April 21, 2015, 09:14:23 AM
Rocket the swinger 1080 has in the
I tires above does not seem that much longer ?

I'll remeasure mate, I had a bloody migrane last night... :o
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Offline Retro Rocket

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Re: GS1100 Swing arm, to CB750?
« Reply #14 on: April 21, 2015, 03:12:27 PM »
I just measured two Stock swingarms in a K6 and a K2 frame and it was 415mm, the GS1100 arm was 500mm. so the Suzuki arm is 85mm longer...  It looks like 1080 has a 77K frame and arm,  which has a longer swingarm than the earlier K models... ;)
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750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline 70CB750

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Re: GS1100 Swing arm, to CB750?
« Reply #15 on: April 22, 2015, 03:37:17 AM »
Here are two links on swingarms I keep for future reference, if it helps at all:

http://www.dotheton.com/forum/index.php?topic=46438.0

http://www.customfighters.com/forums/showthread.php?t=76857
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Offline Retro Rocket

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Re: GS1100 Swing arm, to CB750?
« Reply #16 on: April 22, 2015, 04:07:25 PM »
Quote from: 70CB750 on April 22, 2015, 03:37:17 AM
Here are two links on swingarms I keep for future reference, if it helps at all:

http://www.dotheton.com/forum/index.php?topic=46438.0

http://www.customfighters.com/forums/showthread.php?t=76857

Interesting but, those measurements regarding length are over all length, the length should be measured from the middle of the pivot to the start of the axle adjustment slot,  quite a lot of swingarms have longer adjustment slots, so measuring overall length gives a false reading on where the axle sits, which is the more important measurement... ;)
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750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.
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