Couple things to try

Clean your air filter or get a after market higher flow air filter might help your air intake.
Is there a case around the air filter. Take the lid off it or remove
Are you stock all the way??
32.5 -35 pilots are fine. The only control the idle set with the slide screw.
Move your clip in the direction your manual suggests richen your mid range .
Rejet and up your mains
What mains do you have
Do a plug chop to make sure your jetting is ok.
Make sure your pipes aren't clogged
What ratio oil are you using . Did you ever change your gas oil mix? Believe it or not it makes a huge difference
What octane do you run?
Aim for 1.5. -2 turns on the f/a screw
Change your plug/ plugs often aswell all 2 strokes foul up and will rob your proformance mid to top end
Do you see excessive oil spludge at the exhaust o ring?

 

I heard that, turned 58 Monday and it would be nice to be a spring chicken again.