well even stock you should still feel a decent powerband, my brother has a stock one and i can wheelie all the way through third gear barely pulling on the handlebars, mine didn't have a powerband at all when i got it, turned out the motor was blown and the carb was jetted about 6 sizes too big, and wasn't tuned correctly, once i got that all done right i haven't blown it since, and i have a great powerband now, it's very strong