There are two screws as indicated in the image below that you can use to make fine adjustments as indicated.
Continually test your adjustments by operating the gear lever to change the gears, until you are satisfied with the result.
And that is it...
If you don't feel confident enough to make these adjustments on your electric bike please call us for help on 02380 236 540 or email us at info@lifecycle-electricbikes.co.uk.