I would imagine you are looking for more bottom snap or low end pull. The intakes you mention can be tuned to help, and they will need tuning ie: jets, needle position, etc. If your bike is not completely freshened up (piston, rings, crank seals, reeds) your money would accomplish ALOT more doing that. Better yet, send the cylinder and head (being you will have it off to install a piston kit) to Eric Gorr for some tailored porting. The difference in money is not much but the difference in having a tight fresh bike with the kind of power your looking for "designed" into it, are huge. All of the bolt-ons you install, will be a dissapointment if the engine is not tight.