I race an '09, overall head and shoulders above my '06 YZ.
Jetting on mine was, and still is finekey, very sensitive.
3 different types of bolts shit me, hex, allen key and torx key or a combination of both, f@#k's me why.
Only mods I have done are getting suspension done and a Hardparts pipe and silencer.
50hrs and just fitted first set of rings, approx $100 in parts

I will buy another one....maybe with a 300 kit fitted.