Controller and other electrical componenDrive train Control wiringBatteries mounted
OwnerCharles Chipman
LocationMonticello, Kentucky US map
Web/Email email image
Vehicle1979 Kawasaki KZ650
Classic street bike
MotorMars ME0708 Permanent Magnet DC
DrivetrainChain drive, 6-1 ratio, 72 tooth driven sprocket, 12 tooth drive sprocket. Converted drive chain to #40 in order to keep rear sprocket smaller diameter and to have more ratio choices.
ControllerSevcon Millipak 4Q
48 volt, 325 amp with regenerative braking
Batteries4 Amstron - AP12-75D, 12.00 Volt, Lead-Acid, AGM
12 volt, 75 amphour, deep cycle
System Voltage48 Volts
ChargerSoneil SON4812SR
48 volt, 6 amp, on board
HeaterNone, it's a motorcycle
DC/DC Converter
48 volt - 12 volt, 18 amp
InstrumentationStock front wheel driven speedometer, 0-500amp ammeter, LED voltage indicator
Top Speed48 MPH (77 KPH)
Will do 48, but likes 35 much better.
AccelerationNot tested, but pretty good on level ground.
Range33 Miles (53 Kilometers)
I'v done 33 miles both times that I've ridden it until I could notice a drop in performance.
Watt Hours/Mile122 Wh/Mile
EV Miles
Start:45,203 Miles (72,731 Kilometers)
Current:45,426 Miles (73,090 Kilometers)
Total:223 Miles (358 Kilometers)
Seating Capacity2 adults
Curb Weight0
About 100 lbs. heavier than stock bike.
TiresRear - 110/90-18, Front - 90/90-19
Conversion TimeMarch through June 2011
Conversion Cost$2500
Additional FeaturesRegen braking is controlled by the former clutch lever. The more you pull it the more braking/regen. Added reverse because of it's weight, it was hard to push backward in my gravel driveway. See my build blog at

And my YouTube video at WebPage

code by jerry