Lord Julian used such a flywheel on the Spagthorpe "Irish Setter," a bike he hoped to market in Ireland to those riders who had a bit too much ale at the local pub and would forget to put their feet down when stopping. It was a rather ingenious design, with the flywheel (which also had attached a type of clutch) housed inside a hollow rear wheel (looking much like a Fat Boy's disc rear wheel from a distance, only much thicker). The idea was that the rider could roll up to a stoplight, disengage the flywheel-to-rear-wheel clutch and just keep the revs up to keep the machine standing upright without putting nary a foot down. The only problem was that the typical biker for whom this design was intended would also forget that he was still in 4th gear at the stop and would simply engage the clutch, promptly killing the engine which would then abruptly halt the spinning of the flywheel, resulting in the bike falling over and breaking the rider's left leg on the way down (don’t ask me why they always fell to the left, I really don't understand all the fizzicks involved).

Needless to say, this design idea was shelved and the only two Irish Setter prototypes ever built were most likely dismantled so that the depleted uranium flywheels could be used to make the transmission cases for Spagthorpe Bulldog.