Front quarterbatteryHub MotorDisplayElectron Tanke-Ninja with ridere-Ninja with rider 2
OwnerJohn Twa
LocationBoise, Idaho United States map
Email email image
Vehicle2006 Kawasaki Ninja EX250
Purchased from a motorcycle junk yard without a
title. Getting a new title from the state was a
slow, expensive process.
MotorEnerTrac MHM602 Permanent Magnet DC
Liquid cooled hub motor laced to a Warp 9 wheel.
Cooling provided by a Phobya DC12-400 DC
brushless PWM pump designed for computer
cooling. Coolant mix passes through the stock
radiator mounted in front of the battery box.
DrivetrainParallel twin, DOHC, 4 stroke engine. Six-speed
gearbox. Chain drive.
ControllerKelly KLS12301-8080IPS
24V-120V,300A,Sinusoidal BLDC Motor Controller
Batteries12 Nissan Leaf cells from AESC, 8.00 Volt, Lithium-Ion
Leaf cells connected in series with Leaf
busbars. Batteries managed by an Orion BMS 2.
System Voltage96 Volts
Charger TSM 2500
Wired to run from 110V A/C. Controlled by Orion
BMS through a CANBUS connection.
DC/DC ConverterMeanwell RSD-200D-12
Three Meanwell converters used. Model RSD-
200D-12 provides power for lights, horn, and
motor cooling pump. Model RSD-30H-12 provides
power to the motor controller and BMS. An
additional Meanwell AC/DC converter is used to
power the BMS during charging.

InstrumentationAn ODBLink LX adapter is wired into the CANBUS
loop. It transmits data from the BMS to an
old smart phone via Bluetooth. The smart
phone is running the Torque app to display
pertinent data. The phone is attached to the
top triple clamp with a custom mount.
Top Speed60 MPH (96 KPH)
estimated, still testing
Range60 Miles (96 Kilometers)
estimated, still testing
Seating Capacity1 adult
Curb Weight374 Pounds (170 Kilograms)
Stock "wet" weight of a Ninja 250 is right
around 360 lbs.
TiresFront: 100/80-16 Shinko SR741
Rear: 130/70-17 Shinko SR741
Conversion TimeStarted researching components in August 2018.
Purchased motorcycle in December 2018. After
measuring motorcycle, created a solid model of
the stock motor mount points in Solidworks and
designed a battery box and brackets.
Fabricated steel battery brackets with basic
metal working tools and a MIG welder. Also
fabricated brackets for battery charger, BMS,
motor cooling pump, and display. Body panels
were hand fabricated, and graphics applied.
Maiden voyage on February 23, 2020.

code by jerry