IIRC you're supposed to change oil at 500 miles. Dunno if it's been done.

Not sure if oil has been changed or not .Oil level is right between the lines on sightglass and looks clean. I plan on changing it but need to pick up an oil filter or two. I'm thinking of using Amsoil that has worked well in my XT250 not sure how well it would be for the rockers snd cam of the S40.

Very nice bike! Welcome.

Seeing that you have another bike you are not new to the motorcycle world, but heed the advice of the folks here and don't try to get creative with oil options. Others have done the work for you.  Rotella is what you will find is the most trusted and recommended.  You will see some using synthetic T6 and some using dino T4 but stick to either of these and you're good.

If you have old Rotella laying around post what you have. There are some questions about the CJ/CK rating on some flavors and one has moly in it that is NOT recommended for our wet clutch.  IIRC the one you want is CK-4 which is the good version without friction modifiers (moly). You'll see this on the back label.

oops after re-reading that post, Stewmills is absolutly right the current version of T6 is ok, older versions arnt necessarily.

Sounds like Rotella T6 is the way to go.I defantly need new tires and have seen some posts about replacement tires and sizes. I don't like the stock tires ,they ride hard  and handle poorly. Also 7 years is past an age   I want to trust. Are there any perticular tires that give a softer ride and ha dle well?