First,, matched pairs always work better!! Over the years I have had good luck with IRC both on motorcycle and scooter----Shinko was Yokohama MC but made in Thailand now I think. For me with over 90,000 miles experience with 2 new SilverWings I found Michelin Power Pure SC worked best---they wore round and lasted long time for me. They did well on Burgman 400, too---returning from AK got over 11,000 miles on rear....maybe because I had to. Bike dealers along the way usually do not stock scooter tires in my experience.