Are you coming with your brother by 1 bike.
In my notes, ı see that you also need to hire a bike in İstanbul for your brother for İstanbul-Doğubeyazıt-İstanbul around Mid of June after 3 days stop in İstanbul for marriage ceremony in Germany.
Vehicle Specialthy Customs available only in İstanbul. If you want to do the formalities alone, make your application to Yeşilköy Araç İhtisas Gümrüğü,
with a tax number,police clearence report,passport copy and
with form 7:
Annex 7 is
COMMITMENT LETTER FOR PERSONS TO GO ABROAD WİTHOUT VEHICLES
if you want to park it wherever you want, (a trustable club even home garden) It must not be caught while riding by anyone else except you.
with form 8:
Annex 8 is
TEMPORARY DEMISE/ABONDONMENT LETTER
if you want to leave it to parking area permitted by the customs authorities.
**Difference is :In the annex 8 system, the parked days in customs are not included to 180 days permission of staying period of the bike in Turkey....
You can do this only in İstanbul in a day...In other towns you need to spend more time and do more fights in customs to get this letter:
It’s approved to permit the relevant person’s exit abroad without considering “The vehicle seal” existing on his passport during exit abroad
The Title and the Signature of the Authority
I think ı explained you all visa and customs formalities personally several weeks ago...
This time explained all here so that this can be added to border crossing and customs formalities in HU.pages.
Welcome to the paradise, (for your bike too)
Wish you all the best...