1983 GS750E- Retro Rocket Build

[Busafied]

(this project will mainly be progressive pictures, with some footnotes.)
*Unless someone has specific questions*


First you start with a beat to death 1983 GS750E.

and a mid 90's GSXR motor- yes a Water Pumper.

And you wind up with this:

 

[80GS1000]

Cool project. How're you gonna mount the radiator? Also, what's the plan for the GS motor?

 

[Busafied]

That's the easiest part believe it or not-

Making 2 standoffs / brackets, using the top 2 mounting holes/points for the stock GS oil cooler.
The Oil cooler mounts to the bottom of the 11's Rad.
I will then brace it off the front of the motor like the Hayabusa does.

The GS stuff is already spoken for, thanks for asking, if it falls through I will post here.


Peace-
Ron

 

[heathen]

i think you will need a new back tire. better yet might want to buy stock in a rubber company.

 

[Flaggo60]

That's a very dangerous looking machine-I want one!

 

[Busafied]

man I wished I could fix the Title of this thread somehow it says 1980 but I could swear I typed in 1983- must be getting old timers-

Anyways got the bike rewired and everything tucked away proper.
I found some of the other stuff I need liek a bracket I can make work for my Gauges.
I need to make a plate to mount my coils too, as the area they used to reside in now contains a filler neck.
Still need to fabricate a few brackets to stiffen the motor mounting.
I have several of different designs already, this is not my first time making a motor fit where it was not designed to go, so that is a good thing.

After some wire loom repair and modification/
Tested everything out-
All blinkers horns, headlights warning lights and instrumentation are working.

For now I am sticking with the stock Headlight.
I was tossing around putting one of my spare 86 GSXR dual setups on it, but they appeared to Big and Buggy on the front end of the GS.

I know Leon installed the HID HI/LOW setup in his today, waiting to see how it looks in person to possibly go the same direction/
I like the HID on my Busa, and still have a spare one I may just install on this one.

I figure 2-3 wks and I will be test riding it.:dancing:

 

[Turambur]

Definetly keep us updated. What size motor is it your putting in there? And is it fuel injected? If so did you have to install a ECM?

 

[Billy Ricks]

Definetly keep us updated. What size motor is it your putting in there? And is it fuel injected? If so did you have to install a ECM?

Looks like flatslide CV's to me.

 

[Guest]

I have always thought that would be a brilliant machine. I always imagined it with a oil cooled 750 motor. Looking forward to checking out the progress. you going to do u/d forks and radials?

 

[LeeGS550E]

Hey Busafied - can you tell me any details about that seat?

(I dig the project, BTW.)

 

[Busafied]

Definetly keep us updated. What size motor is it your putting in there? And is it fuel injected? If so did you have to install a ECM?

The donor motor is a GSXR1100 Water Pumper-
Yes a WATER PUMPER in an oil cooled chassis ////

The horror!!!!!!!!! LMAO

My idea is to go with a Blow through setup eventually.
I have a new Garret T3 setting on the shelf waiting.

It is a Carb'd Motor, as Billy said ~

I have always thought that would be a brilliant machine. I always imagined it with a oil cooled 750 motor. Looking forward to checking out the progress. you going to do u/d forks and radials?

My idea was to sneak my GSXR1100 motor into it out of one of my 86 GSXR's, but/
This motor puts down 138 hp as is, so no work needed to make it perform at the level I was anticipating.

Yes I have "Most" of the needed items already, waiting on a few more bits n pieces before posting any more.

Hey Busafied - can you tell me any details about that seat?

(I dig the project, BTW.)

TY-
I have no idea, I know the seat is Dry rotted / weathered beyond salvage.
Every time I set my fat arse on it, the seams tear just abit more.

 

[80GS1000]

Are you planning on bracing the frame at all?

 

[Busafied]

I personally am not worried about bracing the frame:
Until / Unless 1 of 2 things occur, and ONLY if there is a sign of frame flexing. IMHO & HO with the style of riding I will be doing, it will not be necessary.

But below would be factors contributing to the need of said bracing:

1) I start drag racing the thing (not happening)
2) I turbo charge it (most likely happening)

I am honestly worried more about fitting wider rubber to use the new found power completely..

Then when / if the time comes I can transfer all the power to the ground abruptly I will address the possible issue.
I refuse to cry wolf till I personally see the need too.

InMyHumbleOpinion-

Ron

 

[80GS1000]

I personally am not worried about bracing the frame:
Until / Unless 1 of 2 things occur, and ONLY if there is a sign of frame flexing. IMHO & HO with the style of riding I will be doing, it will not be necessary.

But below would be factors contributing to the need of said bracing:

1) I start drag racing the thing (not happening)
2) I turbo charge it (most likely happening)

I am honestly worried more about fitting wider rubber to use the new found power completely..

Then when / if the time comes I can transfer all the power to the ground abruptly I will address the possible issue.
I refuse to cry wolf till I personally see the need too.

InMyHumbleOpinion-

Ron

If you like spirited peg/knee dragging cornering you might want to consider it, especially if you go with a modern suspension with radial tires. The newer USD forks and braced swingarms are much stiffer than their GS counterparts so there's more twisting energy being delivered to the frame.

I braced my subframe along with the newer running gear and it's made the bike a lot more fun to ride aggressively in the twisties - nice and rigid chassis feeling, compared to the hinged-in-the-middle feeling I used to have with the stock suspension and unbraced frame.

Can't link to this page directly, so www.oldskoolsuzuki.info -> GSX/EFE/Katana -> Making the GSX frame stiffer

 

[moto_dan]

Hey Busafied - can you tell me any details about that seat?

(I dig the project, BTW.)

Obviously I'm not Busafied although I know him pretty good. Anyway the seat appears to be a stock seat from an '83 GS750e/es. I too really like Ron's project and am waiting to see the finished project.

 

[LeeGS550E]

Obviously I'm not Busafied although I know him pretty good. Anyway the seat appears to be a stock seat from an '83 GS750e/es. I too really like Ron's project and am waiting to see the finished project.

Oh, I think you're right. Looked up some pics and found one of a stock 750 ES. Not same as the 700ES I have. I thought it was.

Thanks for the help.

 

[moto_dan]

Oh, I think you're right. Looked up some pics and found one of a stock 750 ES. Not same as the 700ES I have. I thought it was.

Thanks for the help.

You probably already know this, but to enlighten others.
The difference is on the bottom of the seat where the side covers fit. The 750e/es seat has a notch on the bottom where the cover fits and the 700 seat is straight on the bottom.

 

[Busafied]

Thanks for the help Dan

I have been really busy with work and such, hoping to concentrate on it this weekend.

I am going to try and complete the fabrication process of the motor mount brackets, with measurements and pictures for someone attempting the same motor/bike combination.
Once that is done, I will :

1) fab the Radiator Brackets & get the rad lines run
2) fill the Rad & purge it.
3) Finish the new Gauge bracket
4) swap out the headlight rings, one has holes through it the other has nuts on the back sides of the holes.
5) Test fit the new rear wheel-
6) figure out how to get gas out of the gas tank, since the petcock has to be relocated-
7) test ride it

 

[BuckarooBanzai]

7-11 project

7-11 project

Busa-

Looking forward to seeing your progress- dont forget to post us some pictures!

 

[Busafied]

After running the Electrical Service to my shop today, had some time to work on the project.

I had a few issues that were needing to be addressed:

1) Coolant crossover tube on back of cylinder needed to be redesigned to clear the gas tank.

2) finished the rear motor mounts for now, got the spacing perfect, chain is absolutely on time via a laser check.
Need to finish the 2 front, and 2 sides.

2) Starting mounting the radiator, had to swap out fans for a gixxer 1k I had on the shelf to get more clearance on the front.
It is due to the header I am using.

3) I had to install the filler neck/t-stat housing, they are separate from the Radiator, for the GSXR1100W's.
I relocated my coils, and used that area for the neck.
Then had issues with clearance, so I had a brainstorm and decided to try and test a theory I had.
I observed the similarities between the GSXR1100 and the GS750 top covers, and swapped them out giving me the MUCH needed room for the filler neck.

4) I will have to heavily mod my Gas tank, going to be a definite job I may have to take somewhere and have it done.
Maybe

5) I fab'd some brackets for the radiator supports but am going a diff direction so they will be tossed.

Pictures here --- > http://s257.photobucket.com/albums/hh206/tbcguy/GS750E/

I will try to find some more time tomorrow after Sunday morning vigil, and a spirited ride on my Steed-

Peace-
Ron