NOTE: DO NOT USE UNLEADED GASOLINE
From Moped Wiki
NOTE: DO NOT USE UNLEADED GASOLINE is a warning on older mopeds and in older moped owners manuals. This warning can be ignored. The purpose of this warning was to prevent people from using white gas in mopeds, and it does not refer to unleaded gasoline as we know it today. Two-stroke engines do not require, and have never required leaded gasoline.
These warning stickers are commonly found on Puch mopeds.