I have a PSI carb, and a Rm 250 phat head for sale. My kids got out of motocross, and this is the last of my go fast parts. Paid $600 for carb, really makes a big differance in power and responce. Completely externally adjustable. Asking $250 shipped. RM 250 phat head for 2003-2008, also fits 01-02, turns out the head is the same just different size chambers. have 1 chamber for stock compression with flat top piston (01-02) with 265cc topend, and 1 chamber for high compression, with it and race gas, it will rip the grips right off the bars. $125 shipped. My # is 662-297-6645 call if interested, as im not online much anymore. Thanks Joey Donaldson.