When the last David Fair opened, Honda also opened a dealership in David. Until then, all Honda Service was Done by Tambor. The Honda dealership is on the Boquete Highway across the street from the Toyota dealer.
Here is a photo inside the showroom.
I noticed they are even selling motorcycles.
Unfortunately, the records of service performed at Tambor are not automatically transferred to the new dealership. When you go in, remember to take in your last service ticket.