cdi rev box and 13 tooth sprocket?

[FMFz400]

would a big gun rev box and a 13 tooth sprocket make a notable difference with overall power and torque? And is it worth the money?

[Colby@C&DRacing]

you will gain bottom end torque but will loose some top end speed.

[tater_kamik]

i wouldnt even get the rev box, from my experienct the low end ones are pretty close to worthless... but with gearing, sprockets are cheap enough where you can but a few front and rears to experiment to find what you like, then get a good sprocket that will last

[ommkevin]

just get the sprocket