low-end power options for xc

[trx400exxracer]

I have a 400ex and I race xc and I already have my suspension mods on there and they are still coming but I want some more low end and torque.

I was thinking
fly wheel weight
cam
but I don't know which ones to get and what other stuff I can get to get more low end power and torque out of this thing:confused:

and what about the powernow kits I heard they added low end

I was planning on this stuff in the future:blah:

[whiteflash]

14t sprocket...