That is so cute. My bf and I ride a Honda Gold Wing. He told me a "biker" secret once. It isn't so much about the bike, IT IS HOWEVER ALL ABOUT THE RIDING.....that's why dogs stick their head out of the car window!!! I do not think your friend will be offended. He will be thrilled that you thought about his prized possession........his bike, no matter the kind Very cute. An idea for a gift for my bf. Thanks.