collapse

www.dimecitycycles.com


www.restocycle.com

www.CITYLIMITMOTO.com

www.jadusmotorcycleparts.com

www.bisonmotorsports.com

www.speedmotoco.com

www.cognitomoto.com

www.townmoto.com

www.sparckmoto.com

www.Moto-Madness.com

www.pistonsociety.com

www.steeltowngarage.com

QUESTIONS ABOUT THE SITE? TROUBLE REGISTERING? ADMIN@DOTHETON.COM

Author Topic: 1981 GS750E (GSX750E) Rat Cafe Racer  (Read 498 times)

Offline LKS

  • Posts: 13
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: 13
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: 13
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: 13
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: 316
  • Evil English Villain
Re: 1981 GS750E (GSX750E) Rat Cafe Racer
« Reply #4 on: Feb 05, 2018, 18:04:12 »
Intriguing.  I'm in.
If it ain't broke, then I haven't been hitting it hard enough.

Offline canyoncarver

  • DTT SUPPORTER
  • *
  • Posts: 3217
  • '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
The Shovelhead springer chopper
A bunch of KZ's...some Suzukis', and a disassembled CB550
--

Offline spotty

  • Posts: 920
  • 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

  • DTT SUPPORTER
  • *
  • DTT BOTM WINNER
  • *
  • Posts: 3145
  • life is short, smile while you still have teeth
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

Keep er' Between The Ditches!!!

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
1973 Ironhead Hardtail: http://www.dotheton.com/forum/index.php?topic=68135.msg788081#msg788081
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 Bennett

Offline The Jimbonaut

  • DTT BOTM WINNER
  • *
  • Posts: 696
    • Lost Apostle
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: 185
Re: 1981 GS750E (GSX750E) Rat Cafe Racer
« Reply #9 on: Feb 06, 2018, 01:19:40 »
In.  Inspiring work.

Offline CrabsAndCylinders

  • DTT SUPPORTER
  • *
  • Posts: 1705
  • Careful With That Axe Eugene
Re: 1981 GS750E (GSX750E) Rat Cafe Racer
« Reply #10 on: Feb 06, 2018, 01:46:50 »
Looks great!
Lighter, Quicker, Faster.
ZX-14, 900F x 2, 1100F, R100, CBR600, SR500, GT500, RZ350, KZ1000 x 2, Moto Guzzi Lemans lll, CBX550, RD 350, 750 SOHC police special, RG250, TL1000R, GT750, KTM Super Duke 1290 R, Harris/Z-1, Norton 750 Commando, Green 77 KZ650

Offline LKS

  • Posts: 13
Re: 1981 GS750E (GSX750E) Rat Cafe Racer
« Reply #11 on: Feb 07, 2018, 11:42:17 »
Thanks for all the friendly replies! I will keep you updated :)

Offline LKS

  • Posts: 13
Re: 1981 GS750E (GSX750E) Rat Cafe Racer
« Reply #12 on: Feb 18, 2018, 18:06:21 »
Got som time with the bike today. Did a test of the rearsets on the brake side. When i have the final measurements for both sides I will make some more parts on my friends cnc-router.
The arms that hold the linkage will be about an inch shorter and much slimmer in the final version.

Pictures:
27971797_10155989847505915_6775108173156400425_n by Lars Krogh-Stea, on Flickr

28055771_10155989847360915_8431573641075982601_n by Lars Krogh-Stea, on Flickr




Video: