Component Layout
OwnerJon Panichella
LocationCincinnati, Ohio United States map
Web/EmailWebPage email image
Vehicle1978 Honda CB750K
Purchased not running in northern
Kentucky. Gave the motor to a buddy who has the same bike, was able to sell some parts such as the carbs to almost pay for the initial cost of the bike.
MotorD&D Motor Systems, Inc. ES-10E-33 Separately Excited DC
Weighs about 53 pounds, puts out 31 HP
DrivetrainDirect drive, haven't determined final
gear ratio yet.
ControllerPenny and Giles PGDT SigmaDrive SEM
72-80V 350A
Batteries24 CALB/Skyenergy SE-40AH, 72.00 Volt, Lithium Iron Phosphate
Going to be purchased from CALIB in
Califoria. Slightly smaller than
comparable to same capacity Thundersky but has higher discharge rates, but lower cycle life.
System Voltage72 Volts
Charger Unknown 72V 3A Charger
Purchased used for right now, plan on
upgrading to a 72V 15A charger from Elite Power Solutions. Promises a 2.6 hour full charge for a 40AH 72V pack. Pretty quick!
DC/DC ConverterSure Power Industries, Inc 71030i
Really nice looking unit isolated, big
fins for heat dissipation and feels very solid. Bought from Barefoot Motors. Haven't hooked it up yet so I don't know how it performs.
InstrumentationLarge Display Cycle Analyst
Top Speed70 MPH (112 KPH)
Just a guess based upon the research
I've done with comparable builds. Seems reasonable considering how much weight I'm going to manage to strip off the bike. We'll see, I wouldn't be too disappointed if top speed was a bit lower.
AccelerationUnknown, should be reasonably fun, though.
Range25 Miles (40 Kilometers)
Just a guess, based upon the research I've done and some rough calculations.
Watt Hours/MileWill calculate when the build is actually finished.
EV Miles
Start:25 Miles (40 Kilometers)
Current:25 Miles (40 Kilometers)
Total:0 Miles (0 Kilometers)
    As of 4/18/2011
Seating Capacity1 adult
Curb Weight350 Pounds (159 Kilograms)
Hoping for a final curb weight around 350 pounds. Managed to lose a bunch of weight by trimming the frame and using a fiberglass tail section and removing metal from the tank.
TiresBridgestone Spitfires
Conversion TimeA year thusfar
Conversion CostI've got around 1000 sunk into the motor, controller, contactor, magura throttles, DC/DC converter, and charger. I estimate another 2,000 bucks on batteries and misc.
bits and pieces.
Additional FeaturesPlan on using MiniBMS to control HVC and LVC, as well as
some basic cell-balancing functions. Also plan on using the Cell-logs from HobbyKing to monitor the voltage of each cell in real time.
It's been a long, ongoing project due to several trips out of town and away from my build, not to mention school occupying more time than I initially anticipated. My goal was to keep the bike lean and light, with enough range and speed to cruise around the city comfortably. A big part of this project was not compromising the original look and feel of the CB750. I want it too look lean and fast, maybe even look like it came from the factory that way. I realize I could get more range out of it by going with a larger battery pack, but was unwilling to make the trade-off of looks and weight. I am making the batteries a focal point of this bike, not something that will be hidden under a fairing. The current layout of the batteries requires a single tray to be fabricated to hold the batteries and controller.

code by jerry