The VIN of your Kawasaki motorbike can be found on the registration certificate (box "E" on the first page of the registration certificate). You can also find this number on the frame of the vehicle. Read it off the frame head: turn the handlebars to the left and you will see the number stamped vertically on the right-hand side.
On ATV' vehicles, look for the number on the lower frame tube, to the left of the engine.
On MULE vehicles, on a plate welded to the frame at the front of the vehicle. On some models also on the frame just behind the front seat. On TRANS models - behind the steering column.
In the case of Kawasaki Jet-Ski, hull-built vehicles, there is a HIN -Hull Indentification Number. It can be found on the hull near the rear platform (usually on the right side). As with road units - you can also find the hull number on the Floating Craft Registration Document under the number "a2".