A classic motorcycle is easier to wheel away than a car and just as dependent on the key. In the overview Security for collectors, you secure it like the vintage vehicle, only with less weight on the keeper's side.
What breaks without a thief
Moisture, a soft tire, gasoline that sits in the carburetor for years, a cover that rubs on the paint. You store dry, the cover so that it does not rub, and you settle the state of the gasoline and the battery before both eat away the inside.
When someone comes
Two people wheel it out of an open hall. Gate shut, the key not in the ignition and not on the nail beside it, the frame number on the list, the papers in the document cabinet. An extra mechanical lock makes wheeling it away slower. It does not replace the gate.
The folder
Frame number, proof, condition, photo. The helmet and the clothing are another subject and do not lie on the seat.