Don't always need to change chaincase oil. I do every other year. Dependent on where it was stored, always check the airbox for mice nests. Little bastards can get anywhere. Grease all the zerks. Check hyfax and carbides. Inspect primary clutch for wear and/or broken parts. Depending on how many miles its ridden, I put a new belt on every year. Performance gains from a new belt seems to always be worth it. That's a good start.