so ive had by motorized bike for a couple weeks now and it just doesnt seam to run the way it should. when im riding i hesitates before exelerating and once i get too about 25mph it just sounds like its either bogging down or missing or something it just plain doesnt run smooth but if i go on a down hill it will smooth out all the way too 30mph keep in mind im only about 140lbs so i would think it should go 30 on flats right? and it should still run right not bogging down even at that?