For a long time I wondered whether anything original could be done with those (old) town motorcycles; cute, but not really 'parts'. Here I have converted one to a tricycle, using some unusual insertions of standard parts to make things stick (on the bottom of the blue layer), as you will find out when you build it yourself. So maybe they are not so bad after all...
Nowadays, you can of course do similar things with the new LEGO(r) tricycles...
980408 (Thank you Will Chapman for fixing my drawing!)