For those who want to know how to disassemble the gearbox, the pinion must be heated to about 200ºc.
Now I'm going to change the bearings.
They are references of Gasgas.
You can send the ecu and they update it to you.
Xavi Membribes is the owner, and was the one who developed the ossa injection.
There is still parts, you just have to search.