Introduction for Crystalyte  Hub Motor Kits

These kits are made in China by a company called Crystalyte in Beijing China who specialise in making hub motor kits which can be easily installed to any standard size bike frame.
The company is quite unique in that alot of the developments of these kits has come from feedback or ideas from ebike enthusiasts or from people who have used the kits on their bikes. The company caters for western style bike frames. Most of the hub motors made in China are designed for bikes with chinese dimensions  but the Crystalyte kits are made to suit western bike dimensions (that is  a width of 13.5cm between the rear frame dropouts.)

The 408 motor I only sell the  rear motor, the dual function motor and x5 are also for the rear only. The rear motor will fit into a standard rear frame of a bike which is about 135mm.Also they are designed so you can fit a rear cluster on them and they will still fit without any difficulty into the rear frame of a standard bike (with a 6 or 7 speed cluster you will have a motor width of 135mm).Only threaded type rear clusters can be used the splined type rear clusters can not be used.

The kits include the hub motor which comes already spoked into a rim.
The other components are a  twist grip type throttle which has led lights which indicate the state of battery charge (only useful when running on 36volts though).

 A controller comes with the kit ,depending on which kit the controllers vary slightly in size and specifications.
The 408 motor comes with a controller that runs on 36v or 48v and a maximum current draw of 20amps, the dual speed and x5 motors come with a controller that can run on from 36v to 72v  and a maximum current draw of 20amps. 
 Also in the kit are brake handles with controller cut off switches on them which turn off the motor power when you brake.

All the wiring is very simple as each connection has its own type of connector so its not possible to get any thing mixed up. Basically you just install everything and plug it all in. Batteries do not come with the kits so the  only part of the install that might be a little more complex is setting up your batteries but is really up you how you do that part.

I prefer at this stage not to supply lithium batteries as I consider them somewhat experimental though I am doing some testing on some lithium batteries to see how reliable/safe they are. There have certainly been some rapid developments in lithium batteries for ebikes.  

The crystalyte motors are all brushless type which means they have a high efficiency of over 80% (or slightly higher, peak efficiency is about 83%). They are extremely good quality and well made. They are gearless which means they are generally good for flat or low/medium type hills and will have a long lifetime, the only parts that can really wear out are the bearings.
The dual function motor is good for medium hills. For very steep hills I think a geared motor is a much better choice as at low rpm the crystalyte motors run at a much lower efficiency than their maximum efficiency.

The Crystalyte controllers are quite well designed.  The warranty is 12 months on the kits and 3 months on the controllers. The  controller has a built in thermal cut off switch, so if the mosfets overheat (get above 80degress celcius) the controller will turn off. Typically most controller failures in ebikes will have something to do with mosfets overheating, so this added protection is quite nice. Further the mosfets can likely withstand up to 130 to 150 degrees celcius before damage.

The controllers also have a minimum voltage cut off which protects the batteries from over discharge. 
If batteries are constantly taken below a certain voltage level their life expectancy is short, hence the low voltage protection.. It is possible to adjust the low voltage cut off but requires opening the controller and adding resistors of specific values into the circuit and is not recommended.

If your interested in any of the motors send me an email and tell me a bit about your project or what bike your going to install into and I can help with what my suit best or any other details you might want to know.

As a general rule bikes with aluminium frames are not the best for converting to an ebike, as with the extra battery weight and extra forces due to the motor there may be risk of some failure in the frame.