is there a mono restricter of some sort on the ninja 250???

every time i seem to get the front wheel off the ground from a (take off position) as soon as the front wheel gets to a certian hight my bike seems to loose rev's quick smart....is there some sort of restriction or is my bike simply a nugget???? i understand its only a 2110 ninja 250 but i cant even get a second squirt of fule to hold it up once i pop it up!!! its straight up then straight down... is it possibel to do mono's on this bike or am i still a shit rider????? please some tips or hints would be great thanks people.