hi you might find the battery needs cycling a few times to get to its optimum power,also the motor might have been better if youd run it in?.all you do to run them in is put the motor in a glass of water and connect it to a single aa battery and run it flat .job done!!or you could try a slightly more powerfull battery what battery are you using?.you could also try a lipo battery this would give more power but as its not a brushless motor it wouldnt last as long but hey these motors are real cheap so it might be worth a try?.