If it was the Immo then the orange light would stay lit.Please help I did the belts and valves on my 2003 st4s now the relay under the seat clicks and the bike will not start. I tryed the red key black key I don't know is it the ecu the immo what am I missing?
If its Orange then thats the Immo light which should go off.It was running before, I checked the white plug and the ground to the ecu. I've got a led light on the dash and it's on.
A new immo is virgin and will connect using the original red key sequencing.Make sure everything you messed with connections-wise is back together correctly. New (to you) immobilizers can be found on eBay occasionally, but that will only solve part of your problem IF the thing is bad. The red key is matched to the immobilizer, not the ECU. The ECU gets matched to the immobilizer with the red key. If you buy an immobilizer, make sure it comes with the red key!
You can also get your ECU flashed with the immobilizer function disabled (Huston SBK, Gotham Cycles to name a few). If you do need a new immobilizer, that would be the cheapest, easiest way I'd think.
I would definitely go back and double and triple check you didn't forget a plug or something though... This is very unusual to have happen, especially if it worked when you took the bike apart.
First rule of any troubleshooting: Who did what last; start from there.