1. Basic Kit 1: $150aud and $80aud freight


 24v/36v  smaller motor /controller 24v-36v/ throttle/ rear mounting bracket

( if your interested in just the motor alone with 9 speed sprocket and no other parts : $55aud for motor and $50aud freight)

Basic Kit one is cheapest way I know to make a decent ebike, driving via chain and rear cassette. No freewheeling pedals with this kit,
so the pedals will be always turning when motor power is on, a little bit dangerous in my view after riding a bike with that set up.
You'll need to find a short length of chain to drive the motor to one of the front sprockets. The mounting bracket will assist in mounting
th emotor but will need to diy how you mount the motor.

Kit contents:

1. 24v or 36v smaller size brushed geared motor.
9 tooth cog on motor, adapter and 14tooth freewheeling cog. ( you'll need to put the adapter and 14tooth cog on the motor if you
want to have freewheeling drive sprocket). The motors are quite robust motors having intenal metal gears.
More technical data on the motor shown at bottom of this page.

Pic below shows cd1 motor ( left) with 9 tooth non freewheeling sprocket on motor,  adapter and 14tooth freewheeling sprocket show in right hand pic.

             
better pic of the adapter and freewheeling 14tooth sprocket that can mount onto the motor axle. Left shows 14 tooth sprocket on adapter, right shows adapter by itself. Adapter and 14tooth sprocket come with the kit ( I also have an adapter for this motor that fits an odysey 13tooth bmx single sprocket freewheel see adapter A2 ).

 

Pic below shows internals of the cd1 motor, showing metal gear reduction ( approx 7:1 ratio), note the factory puts an awful lot of grease in the motors, most of it unused of course, it keeps the motor noise down but is not necessary to have so much grease in there. One alternative to using the motor as supplied, is to use
very low viscosity grease to improve motor efficiency.


 

2. mounting plate

3. controller: 24volt 40amp or 36v 30amp  brushed type pwm speed controller

4. throttle: thumb or twist type ( can come with leds for battery voltage monitoring depends on customer choice). Choice of throttles shown below.

Example of kit ( pics from Rob from Victoria NSW). Notice in the pic below Rob has cut the metal bracket to suit his own mounting method.
At some time in the future I hope to have some better mounting brackets available but haven't organised a complete mounting system as yet, some
diy involved in adapting the bracket to suit your project.

  

Performance: if used with a standard 18 speed ( or similar ) mountain bike, hill climbing ability is extremely good, in fact better than most hub motors,
top speed is about 35km/hr on flat ground in topgear.
Upside: You can pretty much climb up anything in the lowest gear ( via normal rear gear cluster) using one of these setups.
Efficiency is suprisingly high, driving via the gears does make for a quite efficient system as you are keeping the motor in a good rpm range by changing gears
to suit terrain.
Downside: chain drive systems are quite noisy compared to hub motors, and chains/sprockets are not designed for the constant high power that a motor
can deliver ( compared to a cyclist), so you go get more rapid wear on chain and sprockets which will need regular maintenance/replacement.
Pedals will always be revolving when motor power is on, in my view quite dangerous not having a pedal freewheeling system, I can supply a pedal freewheeling
sprocket set see bottom of page. Changing gears with a chain drive motor takes some practice, thats one problem with chain drives, you have to power off throttle
before changing gears but keep some pedalling going, takes quite a bit of skill, and its extremely easy to change gears with motor power on full, and you get some horrible cluncking noises from the rear cluster, you can imagine trying to change gears while pedalling full force on the pedals, that is one thing to keep in mind,
with some practice though can change gears smoothly.

Batteries not included with kit, I would suggest buying some jump starter batteries from large chain stores, they are correct type for use with ebikes.
For further info see: sealed lead acid battery section

More techincal data on small size motor:

Summary of torque graph above using 24volt 25amp controller:
max rpm 530rpm no load, max power out 370watt, stall torque 17Nm, max efficiency 70%.
since the motor can run on a 24v 40amp controller estimated torque would be 28Nm peak, peak output power approx 670watts.

Graph below is data for the internal motor output without before the gear reduction.

If you want a freewheeling pedal crank to go with the kit I can organise for a two sprocket type, pic below shows single sprocket type freewheeling crank only. The pedal freewheeling cranks ( include matching left crank, cranks are 4inch type ) are $85aud each.
 

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