How to build a FAST electric motorcycle. Get the plans: https://www.resystech.com/elec....tric-streetfighter.h

In this video I build an original custom electric motorcycle from scratch for less than HALF the price of an equally sized ZERO S. This aggressive looking streetfighter uses the same 24 kW (32 hp) drive train as the previous Cyber Trike project. Though equivalent to most 300cc street bikes in overall power, this little monster boasts a massive 250 ft-lb of max starting torque and only weighs 300 lbs. Top speed is 150 km/h @ 120V. Full specs and a cost benefit analysis for the build can be found below.

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ROI breakdown:
Cost of electric bike build = ~$5000 total
Nominal battery capacity = 4.3 kWh
Life span of LiFePo4 cells = ~5000 cycles
Range per charge = ~80km @ 80% DOD (up to 100 km @ 100% DOD)
Grid energy cost = $0.12/kWh
Cost per charge (100 km) = 0.12 * 4.3 = $0.52
Cost per km for energy = 0.52 / 100 = $0.005

Avg price of gasoline in Canada = ~$1.00/ liter
Energy in 1L of gasoline = 8.9 kWh
Fuel economy of the most efficient petrol bikes = ~60 miles per gallon, or 25.5 km per liter
Cost per km for fuel = 1 / 25.5 = $0.04

Electric bike energy cost savings per km = $0.04 - $0.005 = $0.035
Savings per charge/cycle (80 km) = $0.035 * 80 km = $2.80
Payback period based on full cycle charges = $5000 / $2.80 =
1785 cycles

OR
Savings per day based on driving an avg 40 km per day as a daily commuter = $2.80 / 2 = $1.40
Payback period = $5000 / $1.40 = 3572 days, or 10 years. 5 years if driven 80 km per day.

It's clear to see that an electric bike like this is a sound investment for nearly anyone who can build and ride (provided laws in your area allow it). Based on battery cycles - which is the most important thing because it will need to be replaced eventually and it is the most expensive component by far - this bike will pay for itself entirely nearly twice in fuel cost savings before the battery needs to be replaced, provided that it's maintained and charged properly (ie don't discharge below 80% DOD, don't store, operate or charge above or below the manufacturer's recommended temp., etc).

Specs:
Power: 12 kw/ 24 kWp, 32 hp gross
Motor: QS273 70H brushless hub motor
Battery: 74V/4.3 kWh LiFePo4
Range: up to 100 km's
Top speed: ~115 kph (71 mph) @ 72V, 150 kph (93 mph) @ 120V
Max torque: 350 Nm (258 ft-lb)
Controller: Kelly KLS72601
Wheelbase: 55" (140 cm)
Rake angle: 26°
Trail: 4.9" (124.5 mm)
Turning radius: 72" (183 cm)
Weight: 300 lb (136 kg)
Front suspension travel: 5" (130 mm)
Rear suspension travel: 8" (203 mm)
Front tire: 120/70-17 Shinko 705
Rear tire: 180/55-17 Metzler Karoo Street

Electrical components:

72V motor
https://www.qsmotor.com/produc....t/17-inch-12kw-hub-m

KLS72501 controller
https://www.kellycontroller.com/shop/kls-8080h/

72V/400A contactor
https://www.kellycontroller.com/shop/kzj-400a/

LiPoFe4 cells
https://batteryhookup.com/prod....ucts/new-battery-hoo

24S (72V) LiFePo4 BMS
https://www.aliexpress.com/item/32851397187.html?

72V-12V Converter
https://www.ebay.com/itm/Pro-C....haser-DC-DC-48V-60V-

12V horn
https://www.ebay.com/itm/12V-L....oud-105db-Motorcycle

12V turn indicators
https://www.ebay.com/itm/12v-F....lowing-LED-Motorcycl

12V/18W LED bar lights
https://www.ebay.com/itm/LED-W....ork-Light-Bar-Spot-F

12V LED brake light
https://www.ebay.com/itm/2x-Be....ndable-2835-SMD-Red-

Sicass Racing handlebar switch
https://www.ebay.com/itm/Sicas....s-Racing-Multi-Funct

Music: 'Dark Epic Hybrid Rock' by Pegasus Music Studio
https://audiojungle.net/item/d....ark-epic-hybrid-rock