exc style display should be the slim speedo typeDisconnect the speedo from the loom 3 pin connector (black, red & brown?) or diconnect bike battery.
It does work on all 03 to 08 exc models and LC4 motors with EXC style display, but you have to start with the display showing running hours, not miles, then press and hold the MODE button till display blinks, cycle through with the MODE button, then when WS blinks you can adjust up/down with + and - buttons, then press MODE again, then press and hold MODE button
I leave my connector undone all the time for quick changes from SM to dirt wheel size. The light does not work, thats all
you're still cycling through your normal speedo options. disconnect the mentioned wires (should be 1 connector), then you need to hold the modusbutton until the display starts blinking, then you can select the WS mode and set your wheelsize.I tried what you reccomended, but the only time ws is displayed is for like the very first second the computer comes on then it goes away. It would not let me cycle through to ws.