Building An Electric Streetfighter Motorcycle - Complete Build & Test Ride!
In this video I build a custom electric streetfighter motorcycle. Plans for this project are available at the following link: www.resystech.com/electric-streetfighter.html
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 over 100 ft-lb of mid-range torque, and only weighs 300 lbs. Top speed is limited to 115-150 kph depending on the system voltage, but it boasts more torque than most 1000cc bikes to produce white knuckle acceleration at legal speeds, so you can still have fun without the risk of getting a speeding ticket, or worse. In fact, unless you're a pro rider with great throttle control on one wheel then you'll probably want to use the controller program to lower the torque to 25-50% for the first few rides.
Specs and links for electrical components can be found below.
Power: 12 kw/ 24 kWp, 32 hp gross
Motor: QS273 70H brushless hub motor
Battery: 74V/4.3 kWh Li-Po
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
24S (72V) LiFePo4 BMS
12V turn indicators
12V/18W LED bar lights
12V LED brake light
Sicass Racing handlebar switch
Music: 'Dark Epic Hybrid Rock' by Pegasus Music Studio
Cost of electric bike build = ~$5000 total
Nominal battery capacity = 4.3 kWh
Life span of LiFePo4 cells = 3000-5000 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 =
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).
Most people only travel an avg of 45 km's per day back and forth to work or school, so as a daily commuter a person can expect a bike like this to pay for itself in 10 years or less. But the great thing is, the more you drive it, the shorter the payback period. Those who travel farther will get a better return on their investment.
RST Website: www.resystech.com
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