Gpz 1100 A2 (Uni-Trac) restoration

[Philippe]

Hi men
I took the decision of starting the restoration of a Gpz 1100 A2, a Uni-Trac.
I bought the bike in the summer of 2019 together with a Gpz 1100 A1.
I have the documents for the A2 but not for the A1 so the best looking bike will become the donor bike...
Just to fresh up your memory the pictures of the bikes when I bought them in 2019 .

the Gpz1100A2

This is the bike that will be restored.

from the other side

It's dirty, painted with a brush!!! and missing a lot of parts but I have the papers!

the Gpz1100A1

This is the donor bike...I know it's a sin to use this one as a donor bike

and from the left hand side

If I'm able to find a wreck of a Gpz1100A2 maybe I keep this one as she is...who knows, time will tell.

More to come soon!
GrtZ
Philippe

[KWACKERZ1]

Both look excellent starting points. will watch with interest.

[000zeds]

Hi Philippe,
I follow your restorations with great interest and look forward to this one and I hope you do not mind me asking but what happened to the documents for the A1

Regards,

David.

[Philippe]

Hi David

I have no idea what happened to the documents. They're lost. The bike is not reported as stolen ! I checked it
In the mean time I'm taking the A2 apart and decided to keep the A1 as she is and find the missing or damaged parts for the A2.
Quite a challenge! More news about that the following weeks.
GrtZ
Philippe

[rpeters]

I have 5 boxes of bits, lot of NOS stuff. Let me know what you are missing philippe
Rob

[Philippe]

Hi men

it's time for a little update.
The bike is taken apart, almost all the parts need repainting, replating, refurbishing ...She's in a terrible state.
Just a few pictures.

the naked frame

the boxed parts

Since Halloween isn't that long ago it's time for a little show of horrors I encountered during disassembly.

the remains of the needle bearings

This happens to needle bearings when there's no more grease in them because the oil seals are deteriorated
The needles were grinded to dust.

the rear brake caliper

The bleeding nipple of the rear brake caliper was broken off, when I tried to get it out the thread came out along with the rest of the bleeding nipple. I tried to tap a new thread in it but it didn't worked out.
The piston is damaged by rust

the Gpz 750 footpeg

Sometimes in the past the left hand footpeg was changed...with the one of a Gpz 750. They look the same but they're different, the one that was mounted is too short.

believe it or not!

If you need a U shaped grommet but you don't have one what would you use? Yes correct, a part of a disc grinder !!!

oh oh !

When opening the engine something fell out of the transmission cover, bad news, a part of the lower crankcase was broken off, I hope it can be welded...

messy, very messy !

The internals of the fuel tank...rust, rust, rust, let's hope we can get it clean and rust free.

So, as you can see it's a project, a difficult one but I hope I can get it right.
Time will tell.
GrtZ
Philippe

[deka]

if anyone can you can Philippe.. give us loads of pics as you go

[Philippe]

Hello

I decided to do some cleaning of the internal parts of the fuel tank, the level sender, the tap, the return valve and last but not least, the fuel tank cap.
If you decide to do this you have to be very calm, don't do this when you're nervous!!!

I started with the fuel tap, disassembly, cleaning inside and out .
Then I cleaned the fuel level sender, yes it can be opened and cleaned inside! You just have to take care that the thin copper wire doesn't brake loose.

the fuel level sender

Afterwards the return valve was taken care of and yes it can be opened and also cleaned .
It's important that the valve can move, it closes when the fuel pump is not working thus preventing fuel to flow from the fuel tank.

the fuel return valve

And for the final part I became nervous in the end!
The fuel tank cap. It has a true lock inside! Not like the lock in our "old" zeds that can be opened with any key but a real lock!
I didn't have the original key so it took me a few hours to disassemble it.
The lock has a lot of parts. Just have a look for yourself.

the disassembled fuel cap

They all have to be mounted in the correct way and in the correct order or the lock doesn't work!
I hope you can see why I became nervous...
But in the end I'm pleased with the results.
More to come soon!
GrtZ
Philippe

[dave cullen]

OFFS! that is a LOT of parts for a lock!!!

[Philippe]

Hi men

it's been a few weeks since my last post but I'm back with news.
I found a B1 engine, in a terrible state but with a good cylinderhead and lots of other usable parts.
During disassembly I broke two pistons but I found two replacements in Germany problem solved.
I could also buy a wreck of a Gpz1100A2, without the engine and the injection but with a lot of other usable parts that were missing.
It came with an original exhaust in a very good shape and with two good tyres. Since I'm not planning to ride the Gpz 1100 those old tyres will be mounted for display.
For the moment I'm cleaning parts, putting them in boxes and making a list of the missing parts.
I have 95 % of all the parts, the missing parts are small ones like: needle bearings, oil seals, gaskets, rubbers,...

The engine of the B1 is taken apart, and together with the engine parts of the A2 I'll make a B2 engine.
That engine will be mounted in my Gpz1100B2. The Uni-Trac engine of the B2 will be mounted in the Uni-Trac frame. As you can read there's still a lot of work to be done.

I cleaned the engine, and today I repainted the engine parts. As always, the old paint was removed by using brushes and a lot of elbow grease.
See for yourselves.

the engine parts

taping off

more taping off

the result of 30 minutes spraywork

some more parts

an another view angle

The majority of the parts in the last two pictures will receive a glossy clear coat so they will be shiny like the original parts.
More to come within a short time.
GrtZ
Philippe

[bedlow1]

Very nice keep up the good work

[rickm]

Great stuff as ever Phillippe

[000zeds]

Keep up the good work

[Skid Mark]

Great Progress, looking forward to seeing more!

[GPZ592]

Looking good