[kz1000st]

You may as well buy the starter kit since the price difference is minimal at best. I have successfully used Seafoam on all my bikes. It clears out gunk in the tank and carb. A story I heard a long time ago was that the Chinese test fire the engines before you get it. They are still using leaded gas which turns to varnish after it dries in the carb. Seafoam will clear it. After you use the scooter this season a cap full of Seafoam will keep the moisture collecting in your fuel at bay while it sits through the winter. Works for me.