Polaris Sportsman 90 - Manual (Page 30)

R--14
PRE RIDE CHECK
Have an adult check the gas level to see if your ATV needs more. Children
should never add their own gasoline. This should always be done by an
adult. Before anyone adds gasoline to your ATV they must read the
instructions and warnings on page 60 in this Owner’s Manual.
Have an adult check the engine oil level when the engine is cold. The engine
is very hot after it has been running. It could burn you. Children should never
check the oil on their own. An adult should be in charge of keeping the gas and
oil levels to the full marks.
Always have an adult put gas in your machine.