This kit includes a 250w brushless motor, mounting bracket,control unit rated to the motor, chain and rear sprocket. The parts are a direct fit to the revvi 12″ and 16″ bike – select bike size. The kit increases the acceleration and torque of the bike.

You can choose from 2 sprocket sizes on the motor:

13T– More acceleration less top speed

15T– Less acceleration more top speed

You can choose from 4 control units:

Slow Start – 2 speed settings– Slow start with 2 speed settings

Slow Start – 3 speed settings– Slow start with 3 speed settings

Fast Start – 2 speed settings– Once fitted the power delivery is much quicker. The top speed is the same but the bike accelerates much faster with 2 speed settings

Fast Start – 3 speed settings– Once fitted the power delivery is much quicker. The top speed is the same but the bike accelerates much faster with 3 speed settings

You can also choose to have a sprocket only, or a sprocket/freewheel unit. See pictures.

Please note:Special tools will be requiredto remove the freewheel from your wheel to change the sprocket! You can remove it using a vice and punch or a freewheel removal tool.

Revvi Cup Note:This upgrade kit is not legal for use in the12″Open class at Revvi cup events. For the Revvi cup events the 170w upgrade kit is allowed!