They rent out scooters like Yamaha Fino and Honda Forza 150. But also an off-road Honda CRF 250 and they even have 2 big motorbikes (Kawasaki Ninja 650 and Suzuki Vstrom 650).
They also have some riding gear. They claim to own their bikes and that all motorbikes have an standard insurance. You will have to pay an deposit that depends on the kind of scooter or motorbike you will be renting. And you will have to show & copy your ID.
Looks like a nice & serious shop. Great for in Nan province. You can fly in to Nan, make a loop in North Thailand and fly out of Nan again.
For more information see Motorbike Tour & Rental Companies