1. Hayabusa K2-K7 ECU Reflashing and Engine data Interfaces
To be used with ECUeditor:
Two different type of interface cables
Engine data only interface
Full programming and Engine data monitoring USB cable
Based on FTDI TTL232R 5.0V cable which supports the special baud rate for gauge data. Can be bought from or
For full reflashing and engine data USB cable an additional 4 pole on-off-on switch is required
switch positions: engine data monitoring on - interface off - reflashing on
You can either get the ECU harness connector pins from or alternatively reuse the Yoshbox harness connector pins 15,16,23,24,25 which become obsolete when reflashing the ecu
If in doubt of your skills I sugest you to have a look at or and buy a ready made interface from there.

2. Gaugedate only interface for 1999-2007 Hayabusas
Engine data only interface for K2-K7 Hayabusa
Recommended for Hayabusa Innovate Plugin users
by PetriK, 2008
This interface is based on using USB to RS232TTL converter to monitor gauge datastream.
ECU harness connector gauge data wire is connected to orange and yellow wires of the USB connector. The black wire from USB connector is connected to black/white ECU harness wire.
Gauge data
Green black wire (pin 33)
GND
BlackWhite wire (Pin 54)
USB connector to computer for data stream
Monitoring or for ecu programming.
TTL-232R-5.0V USB
Gaugedate only interface for Hayabusas

3. Programming and gaugedata interface for K2-K7
Full reflashing and engine data interface for K2-K7 Hayabusa
An USB cable connected permanently to the bike for reflashing
by PetriK, rev 1,
This interface is based on using USB to RS232TTL converter using one ON-OFF-ON switch with 4 separate contacts.
The TxD,RxD, FWE and MD1 are connected to ECU harness connector to empty slots. The Gauge data and GND must be connected to wires that are already connected to ECU.
Switch / interface modes
Engine
Data On
Normal position
All off
Reflashing On
USB connector to computer for data stream
Monitoring or for ecu programming.
USB Cable
Programming and gaugedata interface for K2-K7

4. Engine data and reflashing cable: Build Step 1 parts needed
1 x USB cable
1 x 4 pole on-off-on switch
4 x harness wires or new connector pins installed at the end of wires that you can insert to the ECU harness connector. The sample pictures here use new pins and same colour coding as the USB cable. 2 3 1

5. Engine data and reflashing cable: Build Step 2 connect USB connector and harness wires to the switch
Using the instructions in picture at right solder the USB cable wires in the center swich using the colour code chart at right.
The ecu connector wires are soldered on the outer poles as instructed the colour code chart at right.
If possible use same colour codes for simplicity. If you are reusing the Yoshbox blue or other ecu wires, make your own colour coding chart.
USB Cable

6. Engine data and reflashing cable: Build Step 3 –connect wires to ECU harness connector
While the harness in the bike
Open the ecu connector by pushing white thicker tab to open the connector for inserting new harness pins
Put the wires in respective positions as in picture right.
Pull the white tab back in place
Solder the Engine data wire (green) to parallel to your ecu wire 33.
Connect black wire to your battery negative or in parrallel with ecu wire 26
On the picture at right all the other ecu wires are missing for clarity

7. Engine data and reflashing cable: Build Step 4 – Finalize the assembly
Make sure that none of the original ECU wires has come loose from the connector and double check your wiring against the colour coding.
Re-insert the ecu connector to ecu
Position the switch to a suitable place and leave it in middle position
Connect the black ground wire to the battery negative
You are now ready to set up the connection in ECUeditor software

8. Engine data and reflashing cable: Parts list
USA (appr 40usd total)
USB Cable:       895-TTL-232R-5V-WE
4PDT ON-OFF-ON switch:  e.g EVX
In europe sells the cable
If you dont want to re use Yoshbox pins, then order 4 of new ECU harness connector pins from (appr 0.2usd/one)

9. ECU Harness Connector layout

10. ECU programmer wiring

11. Copyright and liability release
Hayabusa ECUeditor is a very versatile tuning software for both individual persons as for professional tuners.  Anyhow before starting to use the software we want you to understand the risks involved in motorcycle tuning in general.
In a modern engine management control unit there is several hundreds of different parameters to be set, an experienced tuner knows exactly what to change for a desired result. Even though many of the functions are easy to use, to ensure that the bike is properly tuned and operating as expected this software is recommended to be used with a dyno facility that is specialized into ECU tuning and has proper equipment including engine data monitoring cable to validate all the changes with proper testing instrument.
With proper tuning it is possible to make the bike run smoother and faster with a noticeable drivability change. On the other hand modification of the fuel maps or other factory settings may cause the bike to violate local emissions laws and there for modified bikes should not be used on public roadways. Like with any remapping and re-flashing tool remapping and re-flashing can result in the damage or destruction of engine controls system, damage or destruction of engine, and sudden and/or unexpected loss of power or surge in power resulting in loss of control of a motorcycle causing serious injury or death.
When using this software the user of ECUeditor agrees to use map sharing function, which sets the functionality available to the user based map sharing activity. To use map sharing and some of the other functions an active internet connection to is required. For ECUeditor to flash the maps correctly the flashing program must always be started from ECUeditor.
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By starting to use this program the following copyright notice, list of conditions and liability release is accepted:
Hayabusa ECUEditor (and Hayabusa Innovate Plugin), Copyright (c) , MACMADIGAN OY, Vantaa, Finland, All rights reserved.
Redistribution and use in binary forms, without modification, are permitted provided that the following conditions are met: * Redistributions of the software or any parts of it must retain the above copyright notice, this list of conditions and the following disclaimer. * Neither the name of MacMadigan Oy nor the names of its contributors including PetriK may be used to endorse or promote products derived from this software without specific prior written permission. * All advertising materials mentioning features or use of this software must display the following acknowledgement: "Downloadable at
THIS SOFTWARE IS PROVIDED BY MACMADIGAN OY ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MACMADIGAN OY BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.