I've only been riding a couple months, but I thought I'd toss this up.
I bought a '78 KZ200 a little while ago.. and after riding it for about 100 miles I thought I had it tuned in pretty good.
Then I took a basic rider's safety course. I rode a Yamaha 250 dirtbike thing... with a super smooth clutch, smooth shifting, smooth brakes.. it felt great.
From there I hopped onto my KZ200 and realized it wasn't tuned in at all. The clutch needed to be adjusted to be smoother for both take-off and ease of shifting, carb needed help to idle smoother when hot, rear brake lever needed to be down lower and adjusted, and the clutch/brake levers needed to be adjusted back to make everything much, much more comfortable and easy to operate.
After I rode, adjusted, then rode again it almost felt like a brand new bike.
Small adjustments can make such a difference!
Oh, and the safety course taught and solidified a lot of very important things I know I'll use for years to come so I hopefully don't die
Def suggest it.