250w Brushless Upgrade Kit - To fit Revvi 12" and 16" electric balance bikes
 
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 3 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 required to 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 the 12" Open class at Revvi cup events. For the Revvi cup events the 170w upgrade kit is allowed!