I just had the engine rebuilt (04 trx) with Hot Rods HD +3 mil crank, JE's 13:1 piston, Tusk clutch, Cr500 clutch springs, HRC cam, new OEM valves and springs for the intake, new CRF valves and springs for the exhaust, a lot of port work on the intake and exhaust, and all new tranny parts and gears. I know there is more power to be made here with a good carb. I have heard good about both, but just don't know what carb to run. Oh also I race XC if that helps. Any opinions would be appreciated!