What kind of vibrations are you talking about? Unless you’re driving like a crazy man, the vibrations shouldn’t be any more than you might get hauling it in the truck or towing in sled behind atv. I wouldn’t worry about it too much.
I’ve got my Helix 7 mounted in the same spot on the handlebar. Had no issues and in reality the vibrations on the 4 wheeler are less than hitting waves on my boat. You actually have a suspension on the wheeler.