Until you get a full exhaust, you don't need to touch the jetting, unless you bought a Houston bike and moved to Durango CO. That goes for adding a drop-in K&N air filter, and a slip-on of whoever's manufacture. You can leave jetting alone unless your altitude changes drastically.
Jetting is for the big $$ move to a full exhaust, Stage 7, Morley's Muscle, or a Factory Pro jet kit which will also make you change the air filter.
Some people acquire a spare setup & mod it so they can go back to stock fairly easily. Remove & replace as desired. This is handy if you encounter carb problems for instance.
I will still say, "the biggest bang for your buck is to ditch the stock rear wheel, and get a modern sized wheel (17-18") and run radial tires." You can use a narrow 18" front radial on the stock wheel, it isn't optimal, but you can do it. This goes to solving much of the VMax reputation for sketchy handling. If you tried a back-to-back comparison, you would be looking to switch ASAP.
Finding a decent used rear wheel will run about $500-up, and two tires mounted/balanced should run about $250. You might beat that tire pricing checking local or online sales. Consider it an investment in safety, handling, and enjoyment of your ride.
