Recreating my ex race bike

[limeex2]

Been lurking on here for a while. You guys got me re-addicted to GS's. Thanks? Road raced GS's in the late 70's-early 80's. I started on a 77 GS750 with a whole Yoshimura top end. To fast and no brakes.Not a good combo for a first timer. Then it was on to a 79 GS1000s. Ran that for 1 year with carbs and pipes but I needed more,so I put GS1100 swingarm, motor w/carbs and pipes and front end on it. Ran 3 years total until we put a rod through the crankcase during the 3rd hour of its 3rd 5 hour endurance race. Also ran a bone stock GS750E until I Moved to a Honda VF500F. Eventually retiring when I got married and had 2 children. I put the GS in the corner of 4 different homes/garages/sheds.
In 2013 I hit a deer on my 1050 Tiger that put me in a wheel chair for 2 mo and out of work for 5 mo. I was taking pictures of all my old race stuff and was going to sell because I had plenty of time on my hands. Found this web site and couldnt go through with it. I always am sorry when I sell stuff, so let the re-addiction begin. I'm off the wagon. Heres my first build. With forum members help I have re-created my old race bike, with a bunch of new mods. This the first bike of my dream to have a bunch of 80's super-bikes in my garage. Yes Trippivot, I am a dreamer and these dreams WILL come true...

 

[limeex2]

Not good with posting pictures so this could get interesting. Attempted to put another 1100 motor I had into the frame. After using a come along to attempt to line up the motor,I realized there is no way it should be that tight. Frame is bent. S@#T. I had purchased this GS from a friend a few years back. It was my brothers ex-bike who is now deceased so we have a little history going on here. Mechanically sound but sorry guys,butt ugly. huum...

 

[limeex2]

Its winter,i'm bored and really tired of looking at sweet bikes, watching Netflix, and lurking on the GS forum. Maybe instead of putting all this 1100 stuff on the 1000, I will put the 1000 stuff on the 1100. They are the same frame. Yea right. Remove this,cut off that and add a little here. Ya same frame... If you ever really get to know me we have the fine art of sarcasm down to a science at work and some times I forgot to turn it off when I punch out. Sorry.

 

[limeex2]

The goal was to use modern hardware where possible and to lighten her up. FZ-1 rear brake caliper, GS550E rotor. Removed caliper mount and bracket. Lowered CG and centralized weight

 

[limeex2]

My old rear sets were homemade,crud and wore out. Tried some ZRX mounts and a set from a R6. To much improvising. Ended up using Hyabusa rear sets. It was amazing how close they were. My machine at work was having a maintenance day and I picked up a plate of 1/4 plate aluminum for free.Made a bracket. A little grinding here and there and a shift rod from a Triumph parts bike.

 

[limeex2]

Right hand rear set. Eliminated huge master cylinder, brake pedal/rod and lots of frame tabs.

 

[Buffalo Bill]

Sounds like a great project!
Will you build this bike to qualify for vintage racing, or just for track days?

 

[limeex2]

I am not sure what the rules are. There is a great Vintage race at Road America in June. A friend that raced with me way back has gotten back into it and is really fast. If it makes it to vintage, he can ride it and I will have to go into the bottom end. Occasional track day. It will be street legal (barely) Head, tail lights and a mirror.

 

[Buffalo Bill]

Are you gonna use wire rims?

 

[limeex2]

Yes. I have 2 sets of wheels laced up with HD stainless spokes and wider rims. One has a 18" front . They seem to turn in a little better. Salty Monk brake update with Triumph Speed Triple master,SS lines,HH pads. Race Tech front end w/Sonic springs set up by Daughtry Motorsports

 

[Buffalo Bill]

Track riding on wire wheels, this I don't get. They gotta be wobbly under corner stress.
Back in the day, everybody wanted to dump those and get solid wheels.

 

[limeex2]

The HD spokes are almost twice the diameter of the stockers. All old bikes wobble when pushed that hard. You can make it much better, but tough to get rid of. I rode mostly at Brainerd International Raceway. It had a 5th gear wide open corner. 135mph on the GS. Yes it wobbled,but to me, it was part of racing and the character of the bike. On shorter, less high corner speed tracks, really not a problem. Back then there were no economical alternatives to get a wider rim. Morris Mags $$$.

 

[limeex2]

Better shot of the rear brake set up

 

[limeex2]

Little better shot of left rear set under construction

 

[AichGee]

Great stuff, you're a very skilled builder !...A.

 

[limeex2]

Got the bike back from Mike Osowski @ Hy-Per Sports for dyno tuning. Motor is stock with 29k on the speedo. Picked up a set of GSXR1100 36mm carbs from another member and they were a mess. Another member went through them and set them up with lots of new parts. Mike still had straighten the entire rack as it was bent and not properly set up. With the carbs set up properly and a Yoshimura exhaust we ended up with 108 HP and 70 Ft/LBS torque. Motor was left alone as I will go into the motor on my next build, spending the money there. A lot of the stuff I did on this bike was kind of a dry run for the next build. Here's a list of the items that changed front to back. The bike started off as a 82 GS1100E.
GS1000 front spoked front wheel relaced w/ 2.5"x18"rim, HD stainless steel spokes and shod w/110/80x18 Pirelli Sport Demon.
Std GS forks w/Sonic Springs,Race Tech Gold Valves,blocked anti-dive. Set up by Jamie @ Daughtry Motorsports. Terozzi fork brace.
Salty Monk brake update w/Triumph Speed Triple master cyl, S/S brake lines from Triumph Sprint donor bike, EBC HH pads.
ZRX1200 bars.
Honda CB750F tachometer.
Modified fuel tank mounts. Pingle fuel petcock feeding GSXR1100 carbs. Yoshimura Street exhaust with custom mid-pipe and Cone Eng. canister
EBC clutch plates. Originals were slipping on the dyno.
Hyabusa rear sets. Modified seat mounts to accept,I believe an Eikoh seat? members could refresh my memory on this one.
Original Fox shocks rebuilt by Dey-core
GS1000 rear wheel relaced w/ 3.5"x18" rim,HD stainless steel spokes and shod with a 140/70x18 Avon road Road Rider.Pirelli's wouldn't bead up.
Yamaha FZ-1 rear brake caliper w/brake stay removed and custom spacers. 84 GS550ES rotor. Stainless brake line from Triumph donor bike.

The bike is extremely lightweight(will weigh with bathroom scale method later),barely legal in MN,and loud. All my bikes are quiet so I figure I have some decibel credits. It will see an occasional track day but mostly brisk riding on twisty Wi. alphabet roads. I left it unpainted and raw because it is nick named Rat-Race due to my work schedule. It will be a blast to drive as it is a copy of my old race bike,only better,which was fun in its day. The motor mods you guys will all ask me about(oil gears,weld crank,clutch basket,electrical)will be done on my next build,a GS1100ES which will see modern suspension/wheels,more miles,paint and HP.

 

[Buffalo Bill]

What's with the high handlebars?

 

[limeex2]

What's with the high handlebars?

They came off an "L" model and were free...

ZRX bars, Renthal 754's are almost the same bend. About a 2" rise, nice pull back angle that is ergonomically correct for my wrists and wide enough for leverage. Any lower and I will have wrist and neck issues and be into clubmans or clip-ons

 

[Fjbj40]

Your seat is a Zerodd, I have one on my 1000. Here is another shot, not my bike http://www.thegsresources.com/_forum/showthread.php?169426-1978-GS1000-Skunk-Rebuild-and-Mods/page4

 

[RedLiner1100]

I think the bike looks quite nice the way it sits. Is the Hi-Per Sports you mentioned in Maple Grove? I'm going to be looking for a place to have my dyno tuning done this spring once I get my bike back together. Basically the same 82 1100e engine as yours but with a dual Yoshi exhaust, Dyna 2000 ignition and RS36 carbs.