I am going to go out on a limb and say ride in a group of similar skill.
I guessed that last night fool! LOL and you said I was wrong.VolEngineer said:Do all dirt bikes? I don't know I was just guessing. Really old bikes don't I know, but that's a stretch.
Horn, chain, fuel supply valve?
Tires would seem like a good choice if you didn't give that hint but all bikes have tires.