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Author Topic: 1981 GS750E (GSX750E) Rat Cafe Racer  (Read 2175 times)

Offline LKS

  • Posts: 30
1981 GS750E (GSX750E) Rat Cafe Racer
« on: Feb 05, 2018, 14:01:31 »
Hi everyone! I've been working on a bike for a while and decided  I'd start a thread to get feedback and to get help when I get stuck.

Here's a picture of the bike when I bought it. The engine ran OK, but the bike was misssing som parts like som bolts, and one of the engine mounts. I descided to take it apart and make sure everything was in order.

gsx by Lars Krogh-Stea, on Flickr

All the small parts removed:

20151203_212014_zpsze8gyesy by Lars Krogh-Stea, on Flickr

This is how the bike looks now:

IMG_20170708_231958_149 by Lars Krogh-Stea, on Flickr

I'll explain some of the work and choices I've made in the following posts

Offline LKS

  • Posts: 30
Re: 1981 GS750E (GSX750E) Rat Cafe Racer
« Reply #1 on: Feb 05, 2018, 15:48:13 »
I have no previous experience with metalwork, so behind every part is a lot of Googling and hours of Youtubewatching.
In the next picture I've made some kind of buck to bend the rear seat around:
20160529_194812_zpsc9rkobar by Lars Krogh-Stea, on Flickr

Here I've been trying some TIG welding. extremely easy to burn a hole in the thin plates:

IMG_20170408_221434_282_zpsxqqxjpj2 by Lars Krogh-Stea, on Flickr

Here the seat and tank is painted, rat-style. The tank is a cheap, dented one from a Honda CX500. I also found a how to make a seat on Youtube, so I borrowed my wifes sewing machine and followed it as close as possible:

IMG_20170630_144244 by Lars Krogh-Stea, on Flickr

Offline LKS

  • Posts: 30
Re: 1981 GS750E (GSX750E) Rat Cafe Racer
« Reply #2 on: Feb 05, 2018, 15:56:36 »
Wanted wider rear wheels and also wanted to get rid of the cast wheels. So I got hold of a 1977-9 gs750 hub. This hub is for both disc brakes and spokes. Ordered a 4.25x18 aluminum rim for it and powdercoated spokes and hub. The rim was powdercoated by the supplier.

20160707_133821_zpsx0ns4jgx by Lars Krogh-Stea, on Flickr

Snapchat-3550012378084688016_zpshtswbcoz by Lars Krogh-Stea, on Flickr

20160707_212122_zpsp8rix6ty by Lars Krogh-Stea, on Flickr

20170112_101044_zps2gerfrjv by Lars Krogh-Stea, on Flickr


Fitted it with Pirelli Night Demon 150/70-18:

IMG_20170208_083312_zpsnwkvjqnk by Lars Krogh-Stea, on Flickr

Offline LKS

  • Posts: 30
Re: 1981 GS750E (GSX750E) Rat Cafe Racer
« Reply #3 on: Feb 05, 2018, 15:59:01 »
I have a friend with a cnc-router, so I decided to make my own rear sets. Excited to see how that goes:

IMG_20170402_181501_502_zpsbsmnmawy by Lars Krogh-Stea, on Flickr

Offline The Limey

  • Posts: 407
  • Evil English Villain
Re: 1981 GS750E (GSX750E) Rat Cafe Racer
« Reply #4 on: Feb 05, 2018, 18:04:12 »
Intriguing.  I'm in.
I was born a rocker.  I'll die a rocker.  And I'm proud of it.

Online canyoncarver

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  • Posts: 3536
  • 'hacking is learning'
Re: 1981 GS750E (GSX750E) Rat Cafe Racer
« Reply #5 on: Feb 05, 2018, 18:40:48 »
Cool!
--

YZF750/1000R The Fly
KZ 750 Twin
ZRX 1100
KZ400 The Rabbit
65 Norton, My damn Shovelhead chop, and an 86' FXR
more YZF750R's, the KZ's, a Zephyr750...and the unfinished 75' CB550 cafe.
--

Offline spotty

  • Posts: 944
  • Vmax...why,yes i think i will
    • spottys world of vmax (and great danes)
Re: 1981 GS750E (GSX750E) Rat Cafe Racer
« Reply #6 on: Feb 05, 2018, 18:49:50 »
nice, i had the 1100 version a long time ago, it got a 70 endurance racer fairing and a genuine CB1100R kevlar seat, hideously uncomfortable but looked great and went like stink (topped 250kmh out on the highway)

i was amused to see the pic with "small parts removed" with the headlight taken off, not what i'd ever have described as a small part.....

keep up the good work
short fast loud, three things punk rock and vmaxs have in common

south of the border, down melbourne way

Offline Hurco550

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Re: 1981 GS750E (GSX750E) Rat Cafe Racer
« Reply #7 on: Feb 05, 2018, 18:50:55 »
I like it! Nice work so far

Sent from my SM-G920V using Tapatalk

"If you just picked up a drug habbit instead of a kawasaki triple at least you could get high while you waste money"
~ bradj
1988 tw200, the swamp donkey: http://www.dotheton.com/forum/index.php?topic=75455.0
2006 Suzuki DR650 Adventure monowheel trailer build: http://www.dotheton.com/forum/index.php?topic=75033.0
1976 BMW R90/6 farkilitious: http://www.dotheton.com/forum/index.php?topic=74349.msg882477#msg882477
1975 RD350 Road Racer: http://www.dotheton.com/forum/index.php?topic=70652.msg833688#msg833688
1976 GT250 Rebuild: http://www.dotheton.com/forum/index.php?topic=64973.new#new
Full Custom Pit Bike: http://www.dotheton.com/forum/index.php?topic=66954.new#new
1971 Yamaha 90cc twin HS1: http://www.dotheton.com/forum/index.php?topic=70498.0
"much ingenuity with a little money is more profitable and amusing than much money without ingenuity" - Arnold Bennet

Offline The Jimbonaut

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Re: 1981 GS750E (GSX750E) Rat Cafe Racer
« Reply #8 on: Feb 05, 2018, 19:16:18 »
Wait, what?!?  First time making all this stuff and it looks that good?  Kudos my man, looking great!  (And I hear you on the Youtube thing - I'd be sunk without it!)
"I'm telling you Donnie, nuthin' but nuthin' but right"

Offline hooligan998

  • Posts: 221
Re: 1981 GS750E (GSX750E) Rat Cafe Racer
« Reply #9 on: Feb 06, 2018, 01:19:40 »
In.  Inspiring work.