In Atlanata, ga and going to change oil again this spring... what else?

[domindart`]

Hey guys,

Im going to be changing the oil again this spring. Only done it once before so Im still kinda clueless. I 'll have to look it up on the interwebz but I'm sure its an easy thing on these scooters.

I own a 2009 Tomos Nitro 150cc and is there anything else I need to be doing or can do? Injector cleaner in the gas tank?

Sometimes It seems the idle is low but after I WOT it , the idle goes back up to 1500 rpms pretty steadily.

Also, is there a K&N filter that will fit my ride? Would I have to re-jet? Don't know anything about this, and If so then I'll just leave it for now cause the scoot runs great the way it is. Don't want to mess w/ something that works good.

Oh, and if anyone knows of meets in Atlanta let me know, thanks!