I just bought a Puch Maxi Sport. A previous owner must have used it as a dirt bike. The front wire wheel has a 3.50 x <16> knobby tire.
Did Puch ever put out a moped with 16 inch wheels? The front shocks don't accomodate what the parts book shows as the front fender.
I think someone has substituted a front wheel from a small motorcycle.
Has anyone seen something like this?