Hey Irv,
That tank is yellow now. That is the octane bleeding through the plastic. If it really bugs you, you can get a sticker kit for it but that will bubble in time as well. Do a compression test (150ish psi) and change the oil (bell ray gear saver), check tire pressure (15psi) and a new plug. Fire it up and take her for a rip. Also use good oil ( I like Ipone Samurai)
There is a place in the ganny that rents bikes, might be that trail tour page someone posted. They will give you a course or you can just take one of their bikes on your own