mt-01r6

currently own a xt 660x yam, want to buy a classic yam. As it will be used everyday , thinking of buying a 79 dt 175 . any info about running a 175 will be appreciated ,how are spares available etc ,is it feasible to use a 31 year old bike everyday. my bike is my only form of transport and i travel 15 miles a day .any comments will be wellcome thanks