My dad rode motorcycles the whole time growing up but has refused to ride any of my dirtbikes and streetbikes since I was 10 years old, I'm now 28 and he still won't ride my bike. He won't even get on my uncles 883 sportster, I think he has talked himself into thinking he's to old to ride bikes again or something. This past July when I brought both my ZX6R and my ZX10R up to Michigan for the 4th I asked him again and he told me "NO because If I get on it I'd probably like it and end up wanting one"