Additional notes:
The first time Kermit rode a bicycle was in "The Muppets Valentine Show", but it wasn't a marionette. Two rods were connected to the wheel axles, and a puppeteer from underneath simply moved the rods across the screen.
The first "Kermit on bicycle" marionette was from "Emmet Otter's Jug-Band Christmas".
In "Kermit's Swamp Years", Kermit is seen riding a scooter.