The purpose of this research was to study the marketing mix affect to buying decisions of customers to purchase motorcycle spare parts and was to study customer's decision to purchase motorcycle spare parts in the municipal district of San kam phaeng, Chiang mai by collecting data from the simple group ; registered user or the motorcycle owner or the motorcycle users who used the service from motorcycle spare parts shop that located in the municipal district of San kam phaeng, Chiang mai from the number of 400 people. Data analysis consisted of frequency statistics, percentage, means and standard deviation.
The result of the study was shown that the marketing mix was important for buying decisions to purchase motorcycle spare parts. Almost every factor was rated at high level, the first sub-factor of marketing mix which affected to buying decisions of customers to purchase motorcycle spare parts were as following.
Product which there was warranty system price and the product was interchangeable when get some problem.
Price which there was fixed price, constant price and would be notified in advance if there was a change.
Place which there were places that convenient for travel.
Promotion which products were introduced correctly from professional sales staff.
People which facilitator was an expert include skilled and experienced, able to give an advice to customers.
Process which simple ordering process, fast and convenient.
Physical evidence which the products were stored in categories and organized.
For the decision of the most customers were use the service from motorcycle spare parts shop when there was some spare parts dilapidated which has the corrected information to be used in purchasing decisions of customers from sales staff, The reason for choosing was because of the cheaper price than other shops, used the service from regular shop, There was quality of the spare parts by specific brands, Frequency of the service in 1 month 1 time ;the average cost per time not exceeding 500 baht., The individuals who influenced decisions were friends or colleagues, The most take about 1-5 days in a purchase decision which was the artificial spare and would be back to use the service from the same shop.