Throttle – To fit Revvi 18″ and 20″ Bikes Please note: Choose the throttle type that your bikes currently has so it matches your control unit. The throttle type is specific to your control unit.
Option guide:
NO - Red switch: NO - I change the speed setting using a switch on the frames top tube - Red on off button
YES - On throttle: YES - I change the speed setting using a switch on the throttle
NO - Black switch: NO - I change the speed setting using a switch on the frames top tube - Black on off switch