Seafoam is not strictly a fuel injector cleaner , it is a fuel treatment and stabilizer . I have had very good results using it on all of my small engines regularly . I have had the same push type lawn mower for over 20 years , I used to have a battle every spring getting it started . I started using seafoam 1 oz per gal. in my gas container about 3 years ago and have not had a single starting problem with my mower , leaf blower , weed eater , or scooters since . There may be other products that will do , but i know seafoam works . If your Hyosung has a 2 stroke motor it is like comparing apples and oranges . Good luck .