Of all the bikes I sampled (rented) in Chiang Mai, a 400 Honda Bros was the most pleasant surprise; and easily my favorite. Not being an expert about most things road bike wise was very impressed with the solid feel, easy cornering and linear engine that made for relaxing riding (on a road bike that really felt that way for me, which isn't an easy quality to obtain in traffic here with a nervous rider) in city or out. The rental Hondas brakes required too much effort though, but it'd be safe to bet your well maintained example would be just fine.
Good luck with the sale, should be snatched up quickly.