The controller is like a wolf in sheep's skin because it is under tuned in order to optimize for long range. There are lots of potential and features you can unveil and twist as you go. You can program functions such as enable power regeneration, regenerate braking, pulse width modulation, low voltage cut-off, interface with a Cycle Analyst, and others. You may also add an USB to RS232 serial adapter and connect to the computer for tuning. (Electronics knowledge is required to unleash the potential however)
One unique feature of this controller is that it has an additional speed sensor circuitry built-in with an extra blue wire for output. It is to be used with the scooter style electric bike and electric scooters that have a speedometer in the dashboard. As of April 5th, 2010 the speed sensor wire has been embedded and integrated with the green wire on the CA connector since they both can share the same function now. More practical and less confusion as suggested by previous buyers.
If you look carefully in the photos, you will notice this version also uses lock washers to secure the FETs internally and the heat transfer bar outside to place tension against a nut after tightening. It is also to help prevent the nut from loosening. The FETs will get overheated and damaged when detached from the heat-sink which used to be the case from the previous designs.
* For the extremists, you may double and possibly triple the current output to make it a mighty wonder by adding braids wires (http://www.radioshack.com/product/index ... Id=2062744),add solders to beef up the circuit board traces and shunt. It may also be needed to upgrade to larger capacitors, gauge wires for both the battery and the phase wires to the motor. However, if you are going to use a 9C (Nine Continent) motor, It is recommended to maximize the current output at 65A due to the thinner gauge wires being used with the hub motor. There is a potential that any current & voltage combination higher than the current 72V @ 65A will melt the phase wires in the hub motor and cause potential damage. A good observation and one that I think plays a big part in showing why the small 9 FET controllers can seem to pack such a punch when modded. The gate drive circuit in the Infineons I have looks to be pretty similar, certainly the 18 FET circuit doesn't look like it can provide much more gate drive than the 9 FET circuit. My guess is that this is one of the reasons why a well-modified 9 FET controller will seemingly run at upwards of 60 to 70 amps without getting hot; the 9 FET drives the FET gates harder and therefore more efficiently. On my list of things to do one day is acquire some really big FETs and see just what a 9 FET controller can do. I think that, fitted with external FET wiring and shunt, it would easily be capable of running at 65A or more, reliably.
Below is the specification:
Model: EC-094310-LYEN EDITION
Start immediate controller
Chipset: XCKJ8B116A (same chipset being used as in the 18 FET controller)
Circuit board version: EB209-A-3
9 x genuine IRFB 4310 MOSFET N-CH 100V (tested up to 110V before damage) for more information about the FET, click the link below:
http://parts.digikey.com/1/parts/102113 ... b4310.html)
Large 100V 470uF Chengx capacitors equipped (http://dgfoley.en.alibaba.com/product/2 ... 3_LP_.html)
72V battery optimized (for higher or lower voltage & current such as 24V-100V, you may need to change the resistor network to avoid damage to the LM317 linear voltage regulator)
30A is the current rate (for higher current, you may need to beef up the trace, shunt, and reprogram it via the software)
Low voltage cut-off: 62.5v
Battery and motor phase wires gauge size: 12AWG (High voltage capable wires equipped)
Dimension: 4.84" x 3.4" x 1.75" (123mm x 87mm x 45mm) plus mount extensions
Total weight: 445 gram
In case you want to upgrade it later on to became Methods-proof and Doctorbass-proof, you may need to upgrade the FETs to 4110 to achieve higher current as well as voltage above 100V. We have a friend here Steveo who do awesome controllers upgrade for a fee.
I have only 50 made since I am busy working on my other ebike projects. My intention for selling at such low price is to share the fun with other ES forum members instead of making them jealous.
I finally understand why Methods mentioned the cost of labor is steep after all this and I have to agree with him from now on. These controllers are not generic controllers. I have every single one serialized. Quantity is limited, buy it now and upgrade later once your piggy bank is filled up if needed. 
$89 USD free ground shipping in the United States & Canada. For other locations, please PM or email me at LYEN@HOTMAIL.COM. I accept PayPal, cash or money order. The controllers will be shipped out from me in San Francisco, California, USA. I will provide a tracking number and ship it out as soon as I have received the fund.
For only $10 more, I can include the the following:
1. CA connector
2. Regenerative enable/disable (Enabled simply by connect the wires together without the need to open the case)
3. USB-TTL 5 pin connector (for use with the USB-TTL adapter that is sold separate)
I also have the USB-TTL adapter for adjust and alter the controller settings on your computer. It has the extra 5 pin plug and a "SEND" button. It is also compatible with Windows XP/Vista/7 32/64 bit operating system (real 32/64bit drivers). $15 with purchase, $20 if purchase separately.
You may click on the PayPal Buy It Now link below. For accessories, please send money via PayPal or send me a private message for the total price. Thanks!
https://www.paypal.com/cgi-bin/webscr?c ... MY46WP98CG
If you are not satisfy with the results or if it is too fast for you, you may send it back to me within 30 days in an unmodified condition.
Update: Jan 28th, 2015 > I can adjust the controller for 24V, 33V, 36V, 48V, 60V, 66V, 72V, 84V, and other battery settings upon request.
Quantity updated as of 1/21/2013: 49 left (buyer bought 1 from Saint-Petersburg, Saint-Petersburg, Russia )
Quantity updated as of 1/31/2013: 48 left (buyer bought 1 from Merkez, KÜTAHYA, Turkey )
Quantity updated as of 3/13/2013: 47 left (buyer bought 1 from Portland, OR )
Quantity updated as of 3/18/2013: 46 left (buyer bought 1 from Frankston, Victoria, Australia )
Quantity updated as of 3/25/2013: 45 left (buyer bought 1 from Bologoye, Tver, Russia )
Quantity updated as of 4/1/2013: 44 left (buyer bought 1 from Calgary, Alberta,Canada )
Quantity updated as of 4/18/2013: 42 left (buyer bought 2 from Cardiff, United Kingdom )
Quantity updated as of 5/3/2013: 40 left (buyer bought 2 from Hertford, Hertfordshire, United Kingdom )
Quantity updated as of 5/9/2013: 39 left (buyer bought 1 from Viseu, Portugal )
Quantity updated as of 5/11/2013: 38 left (buyer bought 1 from Toronto, Ontario, Canada )
Quantity updated as of 6/7/2013: 37 left (buyer bought 1 from Manhattan Beach, CA )
Quantity updated as of 6/13/2013: 36 left (buyer bought 1 from Erie, PA )
Quantity updated as of 6/13/2013: 35 left (buyer bought 1 from Oakland, CA )
Quantity updated as of 6/18/2013: 34 left (buyer bought 1 from Philippi, WV )
Quantity updated as of 6/18/2013: 33 left (buyer bought 1 from Sylling, Norway )
Quantity updated as of 6/21/2013: 32 left (buyer bought 1 from Thomasville, GA )
Quantity updated as of 6/22/2013: 31 left (buyer bought 1 from Unionville, Ontario, Canada)
Quantity updated as of 7/7/2013: 30 left (buyer bought 1 from Korea, Seoul, South Korea )
Quantity updated as of 7/27/2013: 29 left (buyer bought 1 from Philadelphia , PA, United States )
Quantity updated as of 8/11/2013: 28 left (buyer bought 1 from Philadelphia , PA )
Quantity updated as of 8/15/2013: 27 left (buyer bought 1 from Porta Westfalica, Neesen, Germany )
Quantity updated as of 8/19/2013: 26 left (buyer bought 1 from Portland, OR )
Quantity updated as of 8/20/2013: 25 left (buyer bought 1 from Avellino, Montoro Inferiore, Italy )
Quantity updated as of 8/23/2013: 24 left (buyer bought 1 from SURREY B.C., Canada )
Quantity updated as of 8/23/2013: 23 left (buyer bought 1 from San Francisco, CA, United States )
Quantity updated as of 8/31/2013: 19 left (buyer bought 4 from Philadelphia , PA, United States )
Quantity updated as of 9/1/2013: 18 left (buyer bought 1 from Torvastad, Norway )
Quantity updated as of 9/19/2013: 17 left (buyer bought 1 from New York, NY, United States )
Quantity updated as of 9/25/2013: 16 left (buyer bought 1 from Rancho Cordova, CA, United States )
Quantity updated as of 9/27/2013: 15 left (buyer bought 1 from Moscow, MO, Russia )
Quantity updated as of 9/29/2013: 14 left (buyer bought 1 from Kirn Dunoon , Scotland, United Kingdom )
Quantity updated as of 10/2/2013: 13 left (buyer bought 1 from Stream wood, IL, United States )
Quantity updated as of 10/8/2013: 12 left (buyer bought 1 from Toms River, NJ, United States)
Quantity updated as of 10/31/2013: 11 left (buyer bought 1 from Izhevsk, UR, Russia)
Quantity updated as of 11/14/2013: 10 left (buyer bought 1 from Valbonne, France)
Quantity updated as of 11/17/2013: 9 left (buyer bought 1 from Pretoria, Gauteng, South Africa)
Quantity updated as of 12/24/2013: 8 left (buyer bought 1 from Tel Aviv, Israel)
Quantity updated as of 1/6/2014: 7 left (buyer bought 1 from stockton, CA, United States)
Quantity updated as of 1/23/2014: 6 left (buyer bought 1 from Fremont, CA, United States )
Quantity updated as of 1/29/2014: 5 left (buyer bought 1 from Garden Grove, CA, United States )
Quantity updated as of 8/28/2014: 4 left (buyer bought 1 from land o lakes, FL, United States )
Quantity updated as of 10/14/2014: 3 left (buyer bought 1 from Manhattan Beach, CA, United States )
Attached are the pictures of the controller. Please allow time for the images to load
For a comparable actual value of controllers using the IRFB4310 MOSFET,check here > http://www.ebikes.ca/store/store_controllers.php and here > http://www.electricbikekitz.com/product ... ucts_id=47
Additional accessories (prices are reflected with controller purchase only. Please contact if you are interested to buy without controller):
$15 throttle (full/half/thumb) with mated left rubber grip (very good quality) (ebikekit retails @ $36)
$19 cruise control (manually installation required)
$15 three way speed switch (manually installation required)
$15 PAS - Pedal Assist System add-on (manually installation required)
$15 electric brake levers a pair
$29 motor/controller hall/phase/throttle tester
