Parked Front Left SideParked Back Right SideParked Front Right Side
OwnerMark Eidson
LocationTempe, Arizona US map
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Vehicle2007 Custom
Single passenger motorcycle. Unique suspension with a single air shock shared between front and rear wheels. Commuter vehicle.
Aluminum Tube Frame 1-5/8 .125 wall
Yamaha R1 Wheels and brakes
Air Ride Shockwave 9000 air shock

MotorAdvanced DC L91-4003 Series Wound DC
Configured for Clockwise Rotation
DrivetrainBelt drive between motor and jack shaft. Chain drive between jack shaft and rear wheel. 4.736:1 overall reduction ratio between motor and rear wheel
ControllerCafe Electric Zilla -1K
5K ohm twist grip throttle. Acetone heat pipe to transmission oil radiator cooling.
Batteries6 Hawker Odyssey PC1500T, 12.00 Volt, Lead-Acid, AGM
Group 34
47.3 A for 1 Hour to 10.02 V
400 Cycles to 80% DOD
49.5 lbs
System Voltage72 Volts
ChargerOdyssey OMAX 25A -1B
Individual charger-monitor per battery.
DC/DC ConverterSevcon 622/11086
72/80 300W. This unit drops out for 330ms if the input voltage drops below 60V. To prevent this I have set the Zilla to limit the batrtery voltage sag to 63V.
InstrumentationNone
Top Speed52 MPH (83 KPH)
Speed limited by gear ration and batterhy voltage
AccelerationLimited by voltage sag. Congtroller limit set to 63V to prevent DC-DC dropout.
Range30 Miles (48 Kilometers)
Watt Hours/Mile87 Wh/Mile
Based on a 12.80 mile round trip commute and a battery charger indication of 65% SOC after the trip.
Seating Capacity1 adult
Curb Weight550 Pounds (249 Kilograms)
300# Batteries
82# Motor

TiresYZR1 wheels and tires front and rear.
Conversion Time10 months. 8 month wait for Zilla.
Conversion Cost$6200
I have been commuting to work for 3 months now. I have made a few modifications to the front end to improve tracking and prevent rise dirung hard braking. I plan on lowering the rear suspension piviot point to prevent or reduce rise on hard acceleration and replace the DC-DC converter with a 12V battery. This will allow for faster acceleration. I also plan to lower the gear ratio to ~4:1 to get a bit more top end.

code by jerry