wannabee, the cool can idea is good in hot humid climate, the dump idea is only good if u fatten the carb to compensate fro the loss of back pressure which means it will b too fat when same r closed...a quick et drop is a cheap dist advanced curve kit with which u can tailor ur timin curve to better match the rest of the mtr/drivetrai.....
another cheap trick is to run a shorter tire thus effectively raisin ur numeric gear ratio in ur differential.....also free flow filter elements can sometimes make more power than no element at all....have raced on a shoe string budget for many many years i have many more such inexpensive trick u can use to improve ur perf....tricks that work on any brand of ride too