i have my motor all tore apart to replace 2nd gear, so i thought this would be the time to do some performance upgrades. i was told by someone with a 450 dirtbike that a "hotcam" is one of the best bang for your buck power upgrades you could do to the 450/660s. is this true?? if so, can someone give me some info about it. i searched for hotcam's web site and could find anything... any other suggestions while i have the motor tore apart would be appriciated as well.