You need your carbs color tuned (air fuel ratio set). Mine ran fine but not great in my opinion I tried everything plugs, carb sync, sea foam, diaphragms different air filters and it helped but when I had my carbs color tuned it completely changed the bike. It ran smoother, had the power it lacked at 75-90 mph and I picked up a couple miles to the gallon. I didn't look to see where you lived but you will find a few members on here that have the carb tune to do it with. I know a member in NC and Ohio have them. Good luck
Also the plugs on these bikes need changed ever 8-10 thousand miles. Guys will tell you they have 25,000 miles on there's and it runs fine but until they change then they don't realize it doesn't. You can pull the plugs and think they look good but spend the $10 you will be glad you did. As for valve adjustment IMHO you don't need to spend guy the money yet. If you ask most you will find most wait a little longer I didn't do mine until around 90,000 and only had 1 exhaust valve that was a little tight