Newbie here, hi. I need to replace the batteries in an E200 and would like to do an upgrade while I have the scooter apart. Any suggestions to get maybe an extra 5mph?
If the rider of the scooter is fairly light weight then a 47 tooth sprocket could be installed on an E200 scooter without increasing the size of the motor.
To obtain a 5 MPH or more increase in speed it looks like the 24 Volt motor would need to be overvolted to 36 Volts. Overvolting to 36 Volts would cause the original 2500 RPM motor to run at 3750 RPM as shown in the calculation below.
With a motor running at 3750 RPM the top speed would be 17.91 MPH which is just slightly higher than your 17 MPH goal. Here is the top speed calculation with the motor overvolted to 36 Volts and running at 3750 RPM with the original 55 tooth wheel sprocket.
Overvolting an E200 scooter to 36 Volts would require replacing the 24 Volt battery pack with a 36 Volt battery pack, using a 36 Volt battery charger, and installing a 36 Volt speed controller. Overvolting the motor is more costly and requires more work to modify the scooter than simply replacing the wheel sprocket and chain, however it appears to be the only way to make the scooter go faster than 15 miles per hour.
Thank you for all the info. Would a larger wheel sprocket decrease top speed but improve acceleration?
A larger wheel sprocket would lower the gear ratio which would decrease the top speed however improve acceleration and hill climbing ability.