This research was conducted to determine the purchasing decision on the PT. Yamaha Mataram Sakti. This research exemind the influence of quality's product, price, and advertising on the purchasing decision of Yamaha Mio motorcylce brands in the PT. Yamaha Mataram Sakti Semarang. The Sampling technique used is purpossive. It takes 75 respondents, all of them are the users of Yamaha Mi…