1. ECU programmer wiring

2. Hayabusa K2-K7 ECU Interfaces
Two types
Gauge data only
Gauge data and programming interface
Based on FTDI TTL232R 5.0V cable which supports the special baud rate for gauge data. Can be bought from (
For programming interface an additional 4 connector switch is required

3. Programming and gaugedata interface for K2-K7
Programming and gauge data interface for K2-K7 Hayabusa
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.
Gauge data
Green black wire (pin 33)
ECU connector
Switch
RxD pin 30
TxD pin 29
FWE pin 48
Optional LED with 220Ohm resistor can be connected between these Red/Black pins to indicate non programming state when laptop is connected.
MD1 pin 14
GND
BlackWhite wire (Pin 54)
USB connector to computer for data stream
Monitoring or for ecu programming.
TTL-232R-5.0V USB
Programming and gaugedata interface for K2-K7

4. Gaugedate only interface for 1999-2007 Hayabusas
Gauge data only interface for K2-K7 Hayabusa
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

5. Pictures of interfaces and parts
Gauge data only interface for K2-K7 Hayabusa
by PetriK, 2008
Gaugedata only :
USB to RS232-TTL cable
Ready made interface:
Innovate Plugin interface
ECU Editor/monitor interface
FDT Programming interface
Programming / gaugedata interface:
USB to RS232-TTL cable
Switch with 4 contacts
4 harness pin wires (yoshi wires can be used)
2 wires for GND and Gauge Data
Shrinking tube
Pictures of interfaces and parts