Awhile back I asked for help programing my ECM using a USB to serial port adapter it appeared that this couldn't be done. My Nephew came over and showed my how to make it work. Make sure the drivers are loaded for the adapter. Plug adapter into computer. In the device manager window open the adapter propeties. In the port settings Bits per second should be at 7200, Data Bits 8, Parity None, Stop bits 1, Flow control Xon/Xoff. Click on advanced set receive and transmit to 6. Remember what com port number is showing as you will need to select that port in the programing ECM menu. I have used this on my bike and it works.