EFZR lithium (b)
OwnerJason Jungreis
LocationSan Francisco, California US map
Email email image
Vehicle1991 Yamaha FZR 600
Motor Performance Golf Cart AC15 3-Phase AC
48V, 20 HP peak, 8 HP continuous, with
Drivetrain12-tooth front sprocket, 70-tooth rear
sprocket, 420 chain.
ControllerCurtis 1236
300A (but peaks up around 360A)
Batteries16 CALB/Skyenergy 100AH, 3.20 Volt, Lithium Iron Phosphate
System Voltage48 Volts
Charger CH-LF326
I have 16 6Amp chargers, one for each cell,
as I have no BMS.
InstrumentationCurtis (mph, battery charge state, amps,
Top Speed65 MPH (104 KPH)
It's not intended as a highway bike, so for
the city it's fine for getting through
traffic reasonably quickly.
Accelerationmedium low speed; moderate 20mph-40mph;
medium high speed. It pulls 350A for
acceleration, so it has over 20 HP
available. Feels like a pretty good 125cc.
Range40 Miles (64 Kilometers)
So far the furthest I've gone is about 40
miles and it took about 3.8 KWH net (to
the cells) to bring it back to full
charge, so with a total of a bit over 5
KWH in the pack (and wanting to be
cautious as I have no BMS) I think 40
miles should be fine. (Obviously it
should be able to go further, but I don't
want to risk anything -- and I don't
think I'll ever need to ride more than 40
miles around the city in a day).
Watt Hours/Mile100 Wh/Mile
100 whr/mile is the average when riding
reasonably -- but I find I don't often
ride reasonably when I know I don't have
to worry about maximum range (and I can
wring its neck with impunity. It can be
even better with a really gentle throttle,
and it can definitely be worse with hard
riding. It has regen.
Seating Capacity2 adults -- how great is that for going
out and parking just where you want in the
Curb Weight350 Pounds (159 Kilograms)
120 pounds of batteries, 40 pound motor,
about 25 pounds of chargers, and the rest is
just the light chassis. About 180 pounds on
the front wheel, about 170 pounds on the
rear wheel. Great handling.
TiresFront: 110/70/17
Rear: 130/70/18
Conversion Costhard to say as I took over the original
project, but the CALB batteries cost about
$120 a piece and the chargers $20 a piece.
This project is a re-do of a very nice bike begun by Jordan
Shechter that unfortunately destroyed batteries due to a faulty
BMS. In its first iteration, I went old-school with 6
(alleged) 50AH sealed lead acid batteries: that configuration
had a range of 7-15 miles, depending upon usage. Version 2,
with the 16 100AH lithium iron-phosphate batteries instead of
the lead acid batteries (no BMS), is a huge improvement. I use
it regularly around town, and it's been great - vastly more fun
to be able to open the throttle without having to worry about
using up your electricity. Good enough for two-up riding,
which is important to me.

code by jerry