I would go to the test Centre and ask because every Centre in thailand have different rules as do all other offices here
some say never mind this is ok and some want a letter from god, that’s how it is
do your self a favor and fill out 2 forms, one for car and one for motorbike,. As once you have the tests they will issue both for an extra 150 baht
if you don’t and you want it on the future you have to actually take the full test unless you have a foreign bike licence