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80 GS1100E mods

  • Thread starter Thread starter Anonymous
  • Start date Start date
I've been busy getting the swingarm situation sorted out. I really like the way the 2001 GSXR 750 swingarm looked. A big plus is that it is about the same length as the original so the wheelbase stays about the same. The negatives are that I can't use the 95 wheels as the '01 axle is much larger in diameter. So I bid on, and purchased an '01 rear wheel - fits perfect! The next problem with using the '01 swingarm is the swingarm pivots. I took the swingarm to a machine shop today to take off 0.090" from both sides of the pivot. They are also welding together the bearing races and machining them down a bit so that I can use. I will have to post a pic of this and possibly some dimensions on paper as I cannot explain it adequately in text. It will be pretty pricey to do this >150 dollars because the races are hardened and at 80/hr. it doesn't take much. Oh well, at least tomorrow I can mount the swingarm and rear wheel. All told the swingarm cost $40 and the machine work $??? (tell you after I pay). This is still a lot less than the $600 or more for a custome one. It looks super trick too! Pics later.
 
As promised some pics of the bike with the 2001 gsxr750 swingarm. In these pics the swingarm has been machined to fit and the rear wheel is now secured with the axle. As you can see from the pics, I can still use the stock footpegs. This simplifies matters quite a bit. I have the rear shock roughly positioned using tie downs. I have the lower cases installed to check on the output shaft offset requirements. I will get some stock later next week to build the brackets for final positioning of the shock. After that the battery needs to be moved (there is room forward of the shock), and lots of detail work. The engine build is rapidly approaching.

http://groups.msn.com/SuzukiGSGarage/yoshimurags1000article.msnw?action=ShowPhoto&PhotoID=1019
http://groups.msn.com/SuzukiGSGarage/yoshimurags1000article.msnw?action=ShowPhoto&PhotoID=1020
http://groups.msn.com/SuzukiGSGarage/yoshimurags1000article.msnw?action=ShowPhoto&PhotoID=1021
 
WOW!! This is incredible. Very interested in how it turns out!

By the way why not just get a gsxr? looks like you might end up with one in the end. LOL
 
How are you going to line up the front and rear sprockets? Are you using one of the offset sprockets that the dragracers use?

Hap
 
Ok - a little late but here are some more pics.

First - Sextontz - the swingarm is on auction on ebay - it has maybe 3 days left.

Hap - yea, I used a 5/8" offset sprocket from Precision Metal Fab Racing. pmfronline.com It is a 530 - that helped also since it's a little narrower across the links than a 630, and I did not go with an o-ring chain which helps again. Even so, the frame had to be modified a bit so that there is adequate clearance. They pics do not show the relief well, but you can see where the frame was heated up. I'll post some detailed pics alter - after the powder coat - if anyone needs them. The chain now runs straight and true.

I hope the pics show how the top shock mount was fabricated. I used 1/4" plate and it took a bit of experimentation. I plan on adding a bit more reinforcement from the top of the mount to the frame. It should be plenty strong as it is though.

The battery will mount in the recess towards the front of the bike in the new shock mount.

The mount is tacked in and the bike is free standing now. No need for anything to keep the rear up.

I will be selling on ebay some parts in due time. Rear Koni's and a Yoshimura header are among them. Can't use the header anymore since it interferes with the center stand area - this is where the lower mount is. Anyway, hope the pics help. In this folder there is a pic of the GS before the mods.

Steve

http://groups.msn.com/SuzukiGSGarage/yoshimurags1000article.msnw?action=ShowPhoto&PhotoID=1196
http://groups.msn.com/SuzukiGSGarage/yoshimurags1000article.msnw?action=ShowPhoto&PhotoID=1197
http://groups.msn.com/SuzukiGSGarage/yoshimurags1000article.msnw?action=ShowPhoto&PhotoID=1198
 
OK, Steve, first, really sweet work you are doing.

I have the 81 model GS1100, have been redoing it forever..
You have now peeked my intrested in project #6, TY. :P

Peace,
Ron
 
Check www.gsx1100.com it shows arnouts motorbike and lots of technical info.
I used -89 750gsxr parts in my gsx, front end is simple fit if a little short...in back I also used the centerstand fixing holes with a tube welded in between the outer parts and the linkage went in the middle. I used the gsxr swingarm pivot bolt because it`s bigger and stronger but that meant machining the original holes away from the frame and putting new larger bushes to frame, I also have to grind away from inside sides of the frame so that the arm could fit between. For shocks upper mounting I welded a strong metalplate between the rails into what the shocks upper mounting plate bolts. -89gsxr has a adjustable upper mounting plate so you can adjust ride height, that`s a good one. I haven`t rode the bike yet, there`s so much little things yet to be done, but it looks good. Wheels and brakes are from the same `R, backwheel is Marvic-magnesium wheel. Tailpiece and saddle are from ZX9 Kawasaki and they fit quite right allthough I think I should use the original bodywork...
 
Sami - I've been to your web site before. Good looking bike.

Some questions.

What exhaust system is that? My 'old' 1100 used a Yoshi that required the removal of the center stand. Since I'm using the center stand area for the lower rear shock mount I can't use this exhaust any more. I also do not like any of the pipes offered from the manufacturers now - the drag pipes - they are too low. I was thinking of using a GSXR1100 pipe and fab a mount. I'm not sure if the head pipes will work though. I heard some where they do.

Do you have any pics of the top shock mount? My frame is off to the welder right now and will post pics of mine when I get it back.

Thanks in advance - Steve
 
Sorry Steve, that`s Arnouts website where that link leads, I can`t take credit for that incredible site...I don`t have website `cause I don`t know how to do one...But I have similar bike a little bit racier though and with monoshock. First I cut off that original battery bracket plate between back frame rails and weld wide L or U profile metal plate not straight (for that extra rigidity) in place for that upper mount. I can try send some pictures later but it`s not complicated. We use GSXR1100 exhausts, they fit straight into engine and ends well before that lower mounts. I?ve used Yoshimura 4:1 and my friend Bandit twelves Arrow exhaust and they are easily available. Eagle and Cobra have good exhausts too. I have a ?hlins shock with that adjustable (in height) upper mount.
 
That previous is ofcourse different than in your case because you have that beautiful new swingarm and I have that old crap from eighties...I`m so envious, in here (Finland) there are so few bikes that there aren`t so much new bikes in breakers, at least the parts are expensive. Haven`t you thought about single sider from Honda or Triumph? They are nice looking in GSX or R with under seat exhaust. While you are welding you should also weld tube between front down tubes like in Katana and tubes to the sides of the back frame (triangles). And you can also shorten the back frame `cause there aren`t twin shocks any more (lighter is better). In Arnout`s web site there are pictures from strenghtening the frame.
 
Sami,

Right after I posted I realized that this may not have been your website. He did build a very nice bike.

A guestion about the exhausts - What year 1100 pipes did you use? I'm hoping that all GSXR1100 head pipe configurations are the same as far as spacing and diameter. I have some measurements off the new 1000's and they definetly do not fit.

The only frame bracing I've done at this point is the extra rigity added by the top shock mount and the reinforcement added to the lower engine/shock mount. I could remove some of the frame at the rear, but that means more modifications and I'm not sure exactly how to proceed.

I like that swingarm also. I fell in love with the looks of it as soon as I put it into position. Unfortunately it's a much more difficult fit than the earlier swingarms. The pivot bolt is much larger and its wider near the pivot bolt so I have to relocate the rear brake cylinder to a position on the frame that is not optimum. Well, who needs a rear brake anyway. ;) It will be there, I just need to do more messing around to get the linkage to fit.

There are still lots of details to work out. How to mount the headlamp assembly on the new forks. Do I want to use the GSXR instrument cluster instead of the GS (I hate the 80 mph speedo). Do i want to put a small cafe fairing on.

Fortunately I have a little time to sort these out as the engine is now being assembled. Not much modifications there. All new seals (had to buy individually as I could not find a kit!), oil pump, and gaskets of course. Other than that, possibly an 1168 piston kit (have not committed yet) along with a nice valve job. The 1100 always had a lot of zip and since I'm building for my son, I don't want to give him a monster. He's 21 and thinks he's invincible. Don't want to prove him wrong.

Sorry about the long post, but if you could give me info on the headers (year) it would sure make my job a lot easier. Again, I'll post pics when I get the frame back. I'm a lousey welder and want it done right.
 
Steve,

You're going to have to stick to air/oil cooled Gixxer 1100 exhaust. I'm running a Yosh Duplex from an early '90s 750 model, don't remember exactly what year. It's the stainless model with the aluminum spigots and everytrhing attaches with springs. It's got an RS-3 carbon canister. The bozo on Ebay that auctioned the header and midpipe off spelled Yoshimura with an E instead of a U so nobody saw their auction. I don't remember how I ran across it. Picked that up for $125 then spent another $125 on the canister. Not bad for nearly $1000 worth of exhaust.
 
Correct me if I'm wrong - but from the little bit of research that I've done the air/oil cooled motors were from 86 to 92. I thin they came out with the water cooled 1100 in 93. Is this what you have for info also? If so the I need to get a 86-92 header.

Another point of interest. I was looking at the Hindle website and notice that the 750 and 1100 exhause have the same part numbers for a few years int he 86-92 range. This leads me to believe they have the same dimensions at the exhaust port. The different p/n in other years then ahs something to do witht he mounting. Since I have to fab new mounts anyway, I can probably use the pipes from a 750 in the 86-92 range.

Oh, BTW, I just dropped the crank in today!
 
Swanny said:
Correct me if I'm wrong - but from the little bit of research that I've done the air/oil cooled motors were from 86 to 92. I thin they came out with the water cooled 1100 in 93. Is this what you have for info also? If so the I need to get a 86-92 header.
Click to expand...

That's correct, a buddy of mine has the '93 1100RW model and it's the first year of the watercoolers.
 
Hi! All the GSXR-line bikes has the same space between exhaust-ports so they all fit in all bikes. BUT 750-pipes are smaller in diameter and the height is smaller so they DON`T fit to 1100-engines they hit the oil pan! So use 1100-pipes 89-92 are best because the engine is bigger (1127 versus 1062 in 86-88 models). I had a Yoshi from -90 1100R and that was good. So stick to 1100R pipes in 1100 engine, they aren`t so restrictive in big engine as 750-pipes. For example in 91GSXR collector is 2" and in 1100 is over 2 1/2". I have also problem with the headlight, the original won`t fit anymore and I`m not so keen to go that streetfighter-style headlights.
 
I know I've asked this before, but are you sure the 93-94 1100 pipes won't work? There are a couple of nice sets on ebay right now. One of the listings has a picture that shows the header pipes. They have the larger spacing between cylinders 2 and 3 like the GS. Thanks again for any info.
 
Steve,
Use the ask the seller a question option on Ebay and have them measure center to center of each pipe and diameter at the port. Ask several of the sellers so one of them will answer. Be great to find out.
 
..Right after I posted I realized that this may not have been your website. He did build a very nice bike...

well.. thanks for the compliment! :wink:

..What exhaust system is that?
that is a system consisting of a set of stainless 4-1 Cobra headers, a stainless collector (made for me by a local firm) and a homemade "straight through" muffler..
..I did modify the headers to make them fit a bit closer to the engine by shortening them though (cut sections off and welded back together again)

as for choosing a GSX-R exhaust, I am told all headers of oilcooled gixers should fit..
don't know about the 750's headers touching the sump...
(btw you'd still have to modify the collector + muffler to make it fit..)
 
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