How to Find Your Kawasaki Engine Numbers. 26. April 2016 Scribbit (0) Ordering replacement parts for a Kawasaki engine requires 3 pieces of information: Model, Spec Number, and Serial Number. This information can be found on the sticker at the rear of the engine. The first number refers to the model number and the second number refers to the spec number. The E/NO number under the barcode refers to the serial number. For Example: Model Number: FR691V Spec Number: DS05 Serial Number: FR691VB38797 Always use: The model and serial number on your existing engine to ensure you receive the correct parts!