dual disk upgrade '78 gs750

[kw86er]

Ok I found a few threads on the subject but I am hopping someone has a bolt on answer for me. I have the spoked wheels and as I understand if I take the plastic cover of the right side I will have a place to bolt on another disk. But dual disk bikes use smaller disks so I need 2 new rotors and new fork bottoms at least. Is there a more modern (forks still up side right) bolt on front end from say an 80's Katana or GSXR? I am about to start working on suspension and braking and would like some "trick" ideas. I would also be interested in progressive spring options...

 

[cowboyup3371]

I'm not positive of your model and don't feel up to looking this morning but the PO put forks from a 79 750E on my bike giving it dual brakes. I then put Salty Monk's twinpot upgrade on it using two front GS550 brakes

 

[salty_monk]

You should be able to slide the 35mm forks from a later model into your triple trees & then use either the later Suzuki brakes or the Kawasaki twinpot mod using either you original disk (with a second one the same for the other side) or a set of Honda CBR rotors.
To use the Twinpots you need a caliper bracket & spacer. To use the CBR rotors you need a spacer / drilling template combination.
I don't currently have any but demand seems to be picking up again so I guess I'll get some more cut....

If you are willing to mess about with steerer stops, ignition etc then you can bolt on pretty much anything from a later Suzuki. You may have to upgrade to tapered bearings as stock yours will be ball roller style I believe.
You may find the 37mm front end from a GS1000 or GS1100 is an easy swap.
Anything later (newer) than this will likely be more work & shorter so you have to consider clearance issues. Also you will likely have some speedo issues to deal with as well as the steerer stops & ignition.

For just about the ultimate in suspension technology (without going to a modern cartridge fork) the best you can do is a correctly weighted straight rate spring from Sonic springs & a racetech Emulator.
A progressive spring or just a correct rated Sonic straight rate is a decent upgrade by itself but the emulator makes a big difference.

 

[kw86er]

I am looking at this 83 GS850 roller.

http://abbotsford.en.craigslist.ca/mcy/4291093751.html

Wondering if the front end and rear mag will can be used on my 78 GS750?

It's a shaft drive, can I just swap the drive for a sprocket?

Thanks, kris

 

[SqDancerLynn1]

NO you can't swap on a sprocket

 

[jknappsax]

35 mm fork front end

35 mm fork front end

I have a front end from a GS 650, dual discs, calipers, tubeless front wheel that I was planning on swapping onto my 1978 GS 750, then decided on going with a GS 1000 and a GSXR 1100 front end, wheels and brakes. If you're interested, make me an offer; I no longer have my 750, and I was going to give it to the friend I sold the bike to, but he didn't want to put the work into doing the conversion, and I wasn't about to do the job for him if he didn't want to put the effort into it. If you're interested, PM me and we'll work something out.

 

[kw86er]

This bike is starting to cost a fair chunk... I think I'm going to stick with single disk and spoked wheels for now. Thanks for the help.