Conversion of your bike:

£500:
second-hand engine
new battery (36V 10ah) in a bag in the carrier
driver 250W + LED control panel
sensor, additional throttle
18 mph and 30-mile range
front and rear lighting

£570
new engine
new battery (36V 10ah) in a bag in the carrier
driver 250W + LED control panel
sensor, additional throttle
18 mph and 30-mile range
front and rear lighting

£650
new engine
new battery (36V 15ah) in an enclosed box mounted to the frame or in the carrier (detachable and lock-secured)
driver 250W + LCD control panel
sensor, additional throttle
18 mph and 44-mile range
front and rear lighting

£760
new engine
new battery (40V 15ah) in an enclosed box mounted to the frame or in the carrier (detachable and lock-secured)
driver 500W + LCD control panel
sensor, additional throttle
25 mph and 62-mile range
front and rear lighting

£870
new engine
new battery (48V 15ah) in an enclosed box mounted to the frame or in the carrier (detachable and lock-secured)
driver 1000W + LCD control panel
sensor, additional throttle
28 mph and 62 miles reach
front and rear lighting

£1,070
new engine
new battery (48V 15ah) in a enclosed box mounted to the frame or in the a carrier (detachable lock-secured)
driver 2000W + LCD control panel
sensor, additional throttle
31 mph and 62-mile range
front and rear lighting

£1,160
new engine
new battery (60V 24ah) in a big enclosed box mounted to the frame
driver 300W + LCD control panel
sensor and throttle
37 mph and 124-mile range
front and rear lighting

£1,350
new engine
new battery (72V 24ah) in a big enclosed box mounted to the frame
driver 3000W + LCD control panel
sensor and throttle
47 mph and 124-mile range
front and rear lighting

from £3150 to £5150
reinforced frame
62mph and 186-mile range

OPTIONS:
USB phone charger - £30
front and rear LED lighting - £230 to £60
theft alarm - £40
wheel lock - £40
sat nav - £170
hydraulic brake system - £100