05-07 Rhinos are carbeurated, so altitude above 5000' does sometimes come in to play. As far as spares, a belt, a spark plug, and a fuel filter will get you running most of the time. If you are looking at used, pull the air filter, under the cowl between the seats, and wipe a clean white rag down inside the intake pipe running to the carb. That will give you a good guess if it has inhaled dirt. Good shocks are more important than long travel, but all of it combined helps ride and handling. Also on the earlier Rhino, it lacked reverse power, and a CDI helped that and starting. Also the earlier Rhino only ran a rear brake off the driveline ahead of the rear end, and that also doubled as your e- brake. They always tend to chatter or growl there when glazed. Unless it is tricked out engine and clutch wise, you'll only see about 36-40 mph out of it. The back seat configured Rhinos were grandfathered in if built before 1/2013. Anything after that has to be factory purposed 4 seat.