Hey guys. After some searching, i havnt found any real hard suggestions. I have a yz426f and would like a little more output from her if i can. I do all of my own work, so thats not a real issue. I believe it already has a higher compression piston (has to run premium, 87 doesnt work). It also has gytr exhaust. What more can i do to it? Ive considered port and polish head, but i have been told in the past that its not worth the effort. What about camshafts? I would like to keep my manual decomp if possible, but are there "performance" camshafts? Not new to dirtbikes or engines, but i am new to fourstroke dirtbikes. So idk if the things i would change on a car (ignition, fuel, compression, intake, heads, exhaust) have as dramatic effect on these single cylinders. Any input is appreciated!