1981 gs750 (gs750e) Retro Racer project

[LarsKroghStea]

Today I measured the "speedo A/D converter" and redesigned the housing to not be so bulky. I saved a lot of space by flattening the inside of the housing so it only builds 1mm from the forkleg. Top pictures are the old ones, bottom two is the file I sent to my friend for printing:


Speedogearhus_huset v3_4 by Lars Krogh-Stea, on Flickr
Speedogearhus_huset v3_3 by Lars Krogh-Stea, on Flickr
Speedogearhus_huset_kort v3_5 by Lars Krogh-Stea, on Flickr
Speedogearhus_huset_kort v3_2 by Lars Krogh-Stea, on Flickr

[LarsKroghStea]

And here's the back side of the cover. The two "pockets don't look pretty, but the holes line up with the cover and they're hard to see through the small holes:

Påska by Lars Krogh-Stea, on Flickr

[LarsKroghStea]

Also got the first sidecover done (not with the final paint..). I've had those perforated stainless steel sheets laying around forever and finally got around to use them. I wanted to be able to remove them easily and for that reason I've kept the original mountingpoints on the frame.


First I fired up the lathe and made a "push-button" for the bottom mountingpoint:

Then I made a cardboard template and cut the perforated steel into a loose fit:
Påska by Lars Krogh-Stea, on Flickr


Påska by Lars Krogh-Stea, on Flickr


I'll line the edge with an edge protection profile like this:
96520-K1367-Kantenschutzprofile-Edge-protection-profiles-Form-C by Lars Krogh-Stea, on Flickr


I used the same profile to line the backingplate for the licenceplate:
Påska by Lars Krogh-Stea, on Flickr


I shaped two pices of the same perforated steel to the back of the sidecover and pop riveted them in place, also drillet and riveted the "pushbutton" fastener:
Påska by Lars Krogh-Stea, on Flickr


Did a quick "paint-job" and mounted the cover. The fit is prettyr tight and there is very little room for vibration. I'll go over the edges and fine trim them when i get the edgeprotection profiles:
Påska by Lars Krogh-Stea, on Flickr


Next weekend it's time to fit he speedomoter, and then I'll get to drive it home. That will hopefully speed up the process significantly

[LarsKroghStea]

Got the fuel problems sorted today Firstly, there was a slight kink in the fuelhose. Secondly, and more important, the fuel cap venting mekanism wasn't letting air in and out of the tank. Fascinating how fast the vacuum stops the flow of gas. Now it runs as smooth as it did with the small plastic tank I used for the test run. The petcock is still too tall (can't get the tank to sit low enough and line up with the seat), so I'll have to change it out one day. I'll save this for task for later.

[Buffalo Bill]

Looks very good, original. The number on there, no but it would be acceptable if it designated the model year.

[LarsKroghStea]

Thank you for your opinions

I will go for the large headlight and probably make a little dent at the bottom of the dome so I can position it a little lower.

It's also a great idea to give it the same finish as the rest of the bike. I will keep the "worn/bare metal"-look and add that to the headlight.

I like the worn racing look, and will try to transfer that to the headlight

IMG_20170630_144318 by Lars Krogh-Stea, on Flickr

2019-08-02_10-14-25 by Lars Krogh-Stea, on Flickr

[roeme]

I'd go with your "first" headlight.

To me, the small "choppery" buckets (I think mainly used on the L's?) and deep buckets give a dated look, so I like the "european" (?) buckets best. They're not too deep, while having a nice diameter. I even found some new aftermarket ones which are almost indistinguishable from OEM. I don't have any specific pictures, here are some from my rebuild (click for fullsize):

[steve murdoch]

I think the larger one suits the proportions of the bike and it looks better too.
What ever colour paint or even if you go with the bare metal look, consider doing the headlight the same. I like the continuation along the top of the bike..

[LarsKroghStea]

48737553807_0a319a6834_o by Lars Krogh-Stea, on Flickr


2019-09-18_10-45-33 by Lars Krogh-Stea, on Flickr






I'm not that satisfied with the headlight.. It looks too small, and the profile is too deep wich makes it stick out too far. I still have the first headlight i bought lying around. At the time i thought it was too big, but now I think it maybe looks better. Any thoughts?






IMG_20170328_111354 by Lars Krogh-Stea, on Flickr


IMG_20170328_111151 by Lars Krogh-Stea, on Flickr

[LarsKroghStea]

Here are the two parts I printed today. I haven't sanded the edges or removed the tape or anything. Just wanted to see if it fits, and I'm impressed with the opportunities a 3d-printer brings to the table:


IMG_20200301_181733 by Lars Krogh-Stea, on Flickr


IMG_20200301_181846 by Lars Krogh-Stea, on Flickr

[LarsKroghStea]

So.. work has taken a lot of time the last few months, but I'm back Still working on the design for the petcock, but I've also come up with a solution for the pickup for the digital speedometer. I'm using the original gear on the front axle and the original wire. I've then cut the coupling and bearing out of a broken speedo and made a new house for it with a small disc inside. The disc has a hole for the magnet and the lid has a hole for the magnetic pickup. What do you think?


Speedogear_final by Lars Krogh-Stea, on Flickr

[80GS1000]

Thought I'd give it a try

Curious to see the renderings of the other petcock parts.

[LarsKroghStea]

Designing your own petcock?

Thought I'd give it a try

[80GS1000]

As the season came to an end without me getting the bike on the road, I now have a few months to sort out the problems. First off I decided to make some new parts (again). Here's a teaser for what's to come, a rendering of the first part of a new device:


v5_2 by Lars Krogh-Stea, on Flickr

Designing your own petcock?

[LarsKroghStea]

As the season came to an end without me getting the bike on the road, I now have a few months to sort out the problems. First off I decided to make some new parts (again). Here's a teaser for what's to come, a rendering of the first part of a new device:


v5_2 by Lars Krogh-Stea, on Flickr