[muckyman]

yes change the oil. The bike doesnt have an oil filter
make sure you use the right type of oil. ask your bike dealer what
type to use. change the spark plug and clean the air filter
clean the chain and sprockets and relube with chain wax
make sure all cables move easy and the chain isnt to loose or to tight
check tires and wheels and make sure nothing is loose
drain all the gas out of it and install a new fuel filter
in the fuel line and fill with new gas mix
good luck ... Muckyman