Power output system of minibike

The utility model discloses a power output system of minibike, its power input mechanism set up in the inside of back wheel carrier, and messenger's chain wheel, flywheel and chain or belt all in the protection of back wheel carrier, make the back wheel carrier have omnidirectional protection, reduction sleet weather and the influence of sunshine to power input mechanism to power input mechanism, secondly, back wheel carrier can prevent the foreign object to power input mechanism's mechanical type destruction, very big extension power input mechanism's life. And the inner space of make full use of frame, the volume that makes power output system occupy is littleer, and consequently the bicycle also little more small and exquisite.