My dogs love the sound of my bike approaching. When they hear it, they know I am home. I don't think they care one way or the other when I start it in the garage.
I had a stupid dog. Never did learn to recognize my bike. She was a Siberian Husky (sister in law called her a "devil dog" because she'd sit there and stare at you with those blue eyes).
I came home one night, and it was kind of cold, so I didn't pull off my full face helmet before walking thru the privacy fence gate. I thought she was going to tear me up before I got that stinkin helmet off!