My dad has started putting together parts we had lying around to see if we could piece together a K100GS. 
Dad bought a DR750 front fork and rims about a year ago with this build in mind, so when winter came up here, we started some trials. I drew some concept drawings in my spare time some months ago just for fun.













Right now my dad is making new electronics on the bike, pairing together a 1984 K100 fram and handlebars, with a K1100 engine control unit and a KOSO racing lap timer/speedometer. This is going to get studded tires when done to go to Krystall Rally!

 .....drøyt to måneder igjen, men dere rekker vel det.........

Inge K. wrote: .....drøyt to måneder igjen, men dere rekker vel det.........

Håper å få startet motoren imorgen!   Vi håper vi rekker det ja, var planen å bygge sidevogn før krystall også... men det tar for lang tid, så det blir vel solo sykkel først og fremst. Må få sammen DR750'n også så den er klar til ett nytt år! Den står allerede med piggdekk og har gått noen tusen km på de allerede i år (til tross for veldig lite snø, men hadde en tur over dovrefjell under første snøfall i november)

Hope to get the engine started tomorrow! About two months to get it to a rolling vike with all functions!

Lykke til........selv foretrekker jeg å mate vedovnen, de neste par måneder   .

Be careful with the fire wood it can be very dangerous

Thank goodness for Google Tanslate

http://translate.google.com/#no/en/

Happy New Year To All...   

Bushy

held og lykke med gs'er det skal bli godt at se den færdig   

good luck with the gs will be nice to see it finished;-) 

RicK G wrote:Be careful with the fire wood it can be very dangerous

I'm being very careful, Rick........just carrying a few pieces at the time,
when bringing it inside......oops,watch that step.

Inge K. wrote:

RicK G wrote:Be careful with the fire wood it can be very dangerous

I'm being very careful, Rick........just carrying a few pieces at the time,
when bringing it inside......oops,watch that step.

 

Today we started the engine after it's long time rest, and after a complete rebuild of the entire electrical harness. No exhaust pipe and no intake filters at this moment. 

The DR750 forks are to small in diameter to fit the bike so we tried to put on some K1100 forks we borrowed. But that turned out to be a battle, the lover fork bridge have been used on an EZS sidecar rig. so the lover fork bridge is a bit disfunctional for out use. Both holes wouldnt fit the fork legs, so we grinded them to fit, only to find out that the width of the upper fork bridge was about 0,5cm more than the lover fork bridge. so there will be no testruns until we get ahold of a K1100 fork bridge set or a K100. It turns out the K1100 fork legs ar 41,9mm and K100 is 41,3mm for some odd reason...! 

Check Motobins they have brand new top fork bridges for 12 pounds
http://www.motobins.co.uk/displayfinal.php?s=0&function=show&subs=500c&title=ALL+K%27s&model=&bike=

Be also aware of the different c/c distance 2v/4v.....190/192 mm.


About the different tube dia...different Suppliers....
2v (Fichtel & Sachs) 41,3 mm.
4v (Marzocchi) 41,7 mm.

Inge K. wrote:Be also aware of the different c/c distance 2v/4v.....190/192 mm.


About the different tube dia...different Suppliers....
2v (Fichtel & Sachs) 41,3 mm.
4v (Marzocchi) 41,7 mm.

Found out about that... So when i go to Aalesund for school tomorrow I'm going to get the fork bridges of a K1100 and a K100, as K100 lower bridge and K1100 upper bridge cant work together we found out. 

Today my dad got his 2,5" stainless exhaust system together and tested it out!
This is probably the only K1100/K100 in Norway with center exhaust!



It's a Leo Vince Titanium exhaust pipe for an Ducati of some kind I think it was, never been used before though. Gonne have to insert a DB-killer to get DB-level down quite a bit...

Some pictures from the new exhaust on the bike, video posted above.




Leo Vince SBK Titanium from a racebike of some kind...

It's going to be a sole seat on the bike, and one seat in the sidecar when we get that far ahead.
We've finally got the right fork bridges for the K1100 front fork, so in the weekend now we get to testride it!

Love that under seat exhaust idea. have you and you dad thought about chopping 5 or6 inches out of it and turning it into a stubby? would look cool as hell

ssj_Gill wrote:Love that under seat exhaust idea. have you and you dad thought about chopping 5 or6 inches out of it and turning it into a stubby? would look cool as hell

We've thought about it, haven't gotten that far yet. It's of titanium so it's not weldable, but it should be possible.

Some more pictures! 
K1100 front fork mounted, and it can now be tested in the neighbourhood! But of all days, it started to snow today so...




We also got ourselves a "new" old combined Mig and Tig welder this week! Going to add another Mig feeder case for aluminium too, also got a plasma cutter (don't need that for anything though...) it was free, so we took all of them!   

Some pictures of the new footrest and GSXR750 brake pump and gear shifters, made out of stainless industry steel. Some polishing and grinding left to do!

mleikarnes wrote:But of all days, it started to snow today so...

Living in the wrong part then.....no snow here.....so far.
Good luck with the project, looks promising......

Today we fitted a Suzuki GS500E headlight and blinkers, just to testride (not yet though, snow...) Dad made a new plate to fit the K1100 tank to the K100 frame, as this is not the same on those bikes. I made some progress mounting my DR750 back together to. Started to make a template for bending an aluminium seat plate for making the seat on. as well as a template for a rear end. We're going to shorten the exhaust pipe by 10cm too we desided!





One of the reasons we use a K1100 engine; on a K100 there is a airflow measurement unit that isn't able to be rebuilt into theese K&N filters... On a K1100 there is just Air temperature.

Rear end and saddle underlay nearly finished! All in aluminum for lightweigth, and most strenght!


My dad is going on the first longer test trip tomorrow, going to get the tyres studded, and to the annual meeting in Indre Romsdal BMW Eigarlag ("Inner Romsdal BMW Ownerteam")

mleikarne wrote: "My dad is going . . . to the annual meeting in Indre Romsdal BMW Eigarlag ("Inner Romsdal BMW Ownerteam")"

No doubt going by the back-woods road.  

Great job. Very innovative. I really like the custom footplates.

Testride!



As you see in the picture, we suddenly have a BMW E46 318I car in the family too! Wonder if we could swap engines with the K's....   
 A little video from earlier today;


Still a lot of work to be done, but it runs and can be driven now! New saddle "pillow" have to be made, shortening the exhaust can, new studded tyre in the rear. And my dad is thinking about making the tank straight at the bottom, cut the lower part of and weld it back together... we'll see how that goes! 3 weeks until Krystall Rally still!

Very nice custom design  

Don't you worry about the heat of the exhaust (your leg, bum and back tire)?
Are you thinking of installing a heat shield on the exhaust collector?
On the original exhaust, the muffler (coolest part of the exhaust) starts under the gear box. Your collector is right beside the tire...

CF

Impressive. Wish I had such skills.

How do you go for registration?
Are there any government checks to be done?
A lot of modifications have been done there and a lot would not pass inspection over here.

That is a very brave test rider. Pretty sure I would have pulled the brakes on pretty hard a few times to test them before taking off down the road like that. Still seems to run well.

Wow, now THAT is some custom work!      Thanks for posting the video's too.

OG

rossko wrote:Impressive. Wish I had such skills.

How do you go for registration?
Are there any government checks to be done?
A lot of modifications have been done there and a lot would not pass inspection over here.

That is a very brave test rider. Pretty sure I would have pulled the brakes on pretty hard a few times to test them before taking off down the road like that. Still seems to run well.

Luckily Norway does not have inspection of bikes! We could probably get it approved with the new self building comittiee thats being put together at present time, but we won't try... It's me riding the bike, my dad already has tested the brakes and all of that! Last weekend he was on Krystall Rally with the bike!

Oldgoat wrote:Wow, now THAT is some custom work!      Thanks for posting the video's too.

OG

Thanks! It will be more custom work! (It's going to be a sidecar bike... but we might build one more for solo riding too!

Havent been in here in a while, so here's some pics of the latest progress and work!
It' gotten twin headlights and LED blinkers, new saddle...




My dad tig welding the aluminium rear cover thats on the pictures above:


And I'm soon gonne have to move over to the sidecar part of this forum too; 
One of my late night hobbies is to draw 3D drawings in Trimble sketchup:

inspiring stuff, great read and some great handi work, and I wish someone would give me a big welder

thanks for sharing .....amazing stuff ...
did I already comment about the red frame ???   sweet!