Hello Evripidis,
I guess you want to remove the Cap to take out the springs inside of the fork-tube?

If it is so, remove the Steering bar to get enough space. Be careful , so that no Brake fluid escapes from the reservoir and perhaps damage other parts, e.g. your Fuel-Tank.

To remove the Caps it self you will need
 - a small Screwdriver with blade end, /(for slotted screws),
 - a Wrench Nut which fits to the Air Valve hex, and a suitable tool to get more distance for better workspace.
1. Take the wrench Nut assembly onto the hexagon socket of the air Valve
2. Puch down the Cap, enough so that the circlip inside is fully visible.
3. with the Screwdriver you can level out the beginning of the circlip. But be aware that the circlip is not jumping away. It it difficult to find it.
   It is a little bit tricky, but it will coming out.
4. Now let the plug (Cap) coming out by releasing pressure. If the Plug is not coming out at the first time, try again to push the plug into the Fork Tube and than release the pressure of holding down immediately. If necessary try it several times.
Reason could be some dirt inside, or a little bit of deformation of the grove of the circlip.

Regards Anja

Hello Evripidis,
one  at first. My Description belongs to the removing of the Fork-Tube-Caps (Imags No: 15/38) with the Air valve in it.

Do you want to change the Oil seals of the Fork?
If you want to go ahead with your scheduled Replacement, be aware not to scratch the inner Tube !!!

Primary, it would be better to take the Front Fork Units out and fix them on your bench.

I have attached to images with parts of the Fork Assembly:
8 /31 = Dust Cover
4/27 = Circlip of the Oil-Seal
3/26 = Oil-Seal

Regards Anja

Hello  Evripidis,
you need to support the Engine !
-----
have a Look here:
https://www.tr1.de/pages/forum.php?iQuery=num=1724322130/3&anchor=3

Re: Zylinderköpfe demontieren an der Yamaha xv1000 tr1 5a8
Antworten #3 - 26.08.24 um 10:42:34
including a drawing for a selfmade Enginesupport (german: Motorstütze)
see also the pictures one abow
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You can use it for:
when using two additional clamping wedges to lift it a little bit (until the the Front Tire has cleard the ground):
- for Front Tire change
- for Works on Front Fork

without wedges:
a) loose Front Fork Clamps a allow Fork Tube to slip up, the Engine support device has to be come to the Ground.
Then:
- for Works on the Engine. e.G. for removing Cylinderhead / Cylinders

IF you are support your Engine by using a Wood Block or a hydraulic lifter, be aware to secure this safely to prevent falling away your Support from the Engine.

While working on the Front Fork, taking out a Tube or so, it is possible that your bike can come to a swinging. This swinging can shake your support away, if it is not fixed in position.

regards Anja

Hallo Anja,

I did it differently! But your plans are spot on and will at some point implement them.

I drilled 2 holes in the ground and attached a hook. The I used a ratchet strap to tie down the rear end very lightly. I had enough clearance to remove the forks.

Now I am back to read again what you have written about removing the cap....

I might have a hard time.

I think that the forks where filled with the wrong oil, it was too thick coming out....

Evros

Good Moning Evripidis,
your TR1 looks good, so far.
You are very creative, indeed.

Fork-Oil : 10W , Volume per Tube: 288ccm
Kind regards
Anja