How I Built An Electric Motorcycle From SCRATCH - Build & Test Ride!
In this video I show how I built a torquey electric motorcycle from scratch. Check out my blog for all the details on what parts and materials I used and how I put it all together:
Get the plans here: https://www.resystech.com/electric-streetfighter.html
I built this bike for less than HALF the price of an equally sized ZERO S (~$5000 Canadian). This aggressive looking streetfighter uses the same 24 kW (32 hp) drivetrain as the previous Cyber Trike project. The QS direct drive motor produces 250 ft-lb of instant torque, 150 km/h top speed at 120V, and the entire bike only weighs 300 lbs, making it comparable to most 300cc ICE bikes.
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Cost of 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 per kWh to charge at home with 110VAC = $0.12/kWh
Cost per full charge (100 km 'tank') = 0.12 * 4.3 = $0.52
Cost per km for energy for electric bike = 0.52 / 100 = $0.005
Avg price of gasoline in Canada today = ~$1.50/ 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 for gas bike = 1.5 / 25.5 = $0.06
Electric bike energy cost savings per km = $0.06 - $0.005 = $0.055
Savings per charge/cycle (80 km) = $0.055 * 80 km = $4.40
Payback period based on full cycle charges = $5000 / $4.40 =
Savings per day based on driving an avg 40 km per day as a daily commuter = $4.40 / 2 = $2.20
Payback period = $5000 / $2.20 = 2272 days, or 6.2 years.
Ie: it will pay for itself in ~6 years (or 1136 cycles, more specifically), completely. LONG before the LFP battery wears out at 5000 cycles. At ~$200/kWh, I could replace the battery almost 6 times with the cost savings to be had - not that I would need to, though. It should be clear to see the long term cost benefit to buying or especially converting to electric.
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
Music: 'Dark Epic Hybrid Rock' by Pegasus Music Studio
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