Only 7 deadly sins?
How about these?
1. The tail gunner. He rides so close to your tail you think he is riding on the pillion
2. The farmer. Gets bored waiting for the group to catch up so he takes a spin through the farmers field
3. The mechanic. He want to "fix" something while riding that can be done when the ride is over. Example, "Let me adjust my handlebars. It will only take a minute."
4. The delay. Everyone is ready to go but him. He has to finish a cigarette, get another drink of water, take another bite of food and is the last to put on his helmet after every stop.
5. Mr. Open Sesame. He believe private property is only private if you are caught. States things like, "the road is on my GPS so it is public".