i agree a boondocker or some type of controller is a must. intake and clutching is also a must. take some time make that sled do what it is built to do and you will get in all kinds of bad places...
Did you check out “RK Tek” they are located in Idaho they specialize in head work "2strokeheads.com" is the web good info on the web a few guy's I know have gone this route
I run a 08 M8 153 with a Boondocker Box, Skinz Can, Slp Pipe great sled lot's of power but more is always a good thing.