need speedddd

[honda965]

ok i have an 03 300ex and ive done a good amount of work to it now i just wanna get to the motor and get it quick. ive got K&N filter,FMF pipe, 400ex carb,airbox mods are the only things that deal with speed, other than sprokets. ive got a good amount of work other wise, i jsut want speed. i plan on doin the 450r swinger and 250r shock for my rear than idk about my axle? what would u's suggest? or would you say just get 400ex whole rear end? im ordering a rev box and sproket kit. so other than that.... what do you suggest to do? give me your suggestions with the part;size,type thanks

[250X_project]

Now when you say speed do you want throttle response or just a good top speed?
I, personally would go with an aftermarket axle like the durablue, or the G-force not the oem 400 rear end...
and actually If you were real concerned and had $ to spend I would actually get a diff. exhaust- I would go with sparks(what I want next)...
but if you want power and to let that engine breath there are many options...cam, porting, big bore, stroking....depends on how you ride...