Does the club have very clear guidelines about the rides? You need to have a clear structure about who is in charge, who is the tail rider, what needs to happen when breakdowns occur, who buddies up with whom in case of problems, hand signals, what the routes will be, where you will stop for breaks or gas, etc. Also, each rider needs to understand very clearly that their scooter should be in very good upkeep and fully inspected before leaving. Granted, problems occur, but good preventative maintenance will keep them to a minimum. Maybe make up a pre-ride check sheet for everyone so there's no doubt about what is expected. I know this sounds a little hard nosed, but everyone will have more fun if there are fewer problems and interruptions, and everyone is on the same page before taking off. Many adults still act the same as they did back in high school when they get into a group (they just never grow up), so you have to find a way to respectfully set the boundaries for them in a way that isn't insulting or condescending. Just my two cents worth. (And, yes, I'm a teacher...)