I'm looking to buy a 6 volt, 200mm (clutch size) Flywheel.
Most 6 volt flywheels use 180mm cluches.
The 200mm came of early buses, transporters, pickups..
(http://vwparts.aircooled.net/v/vspfiles/photos/DPR-Light-Type-1-Flywheel-2.jpg?v-cache=1397903792)