The way i look at it is, Less drag on the motor which in turn gives you more power, Sealed engine so more reliability, Less maitence because you dont have to be cleaning that OWB before every race day, ect ect. TO many reasons for ME to ditch all that stuff. Starter box is just a battery and wheel. Never had a bearing lock up and cause me a race since i went starter box. But if you dont mind all the work that a pullstarter gives you then more power to ya.