The problem is finally solved (thanks to someone posting the cure on triumphrat.net). As of today, I have started the bike consistently over 20 times, with no side effects (for the first time in nearly 2 years of ownership).
Here's what my dealer/tech used to rewire a couple of connections on the ECM:
02-02-2013, 08:10 AM #156 (permalink)
JustPete
Senior Member
SuperStock
Main Motorcycle: Bonneville
Join Date: Jul 2012
Location: NEPA US
Posts: 225
I don't know the cause of the starting issue but I'm sure Triumph does and can correct if they so desire but....
Remove the BO wire from pin A33 and the YN wire from pin B6 on the ECM connectors. Verify using a meter that you have the correct pins before proceeding.
You first remove the purple lock from the end of each connector, pry gently on the sides and it will pop out. Look inside and you will see a black plastic hook, looks like a shell extractor, very gentle pry this back from the pin to allow the pin to be removed. Use a plastic or wood pick to do this. After removing the pins install blanking pins in their place.
Pull the removed wires through the boots, this will give you enough wire length. Slide a piece of heat shrink over one wire, place the pins on each other and wrap with a fine strand of copper wire. Slide the heat shrink over the pins and shrink. This method will allow return to original if desired.
It's uses the clutch switch as the ground signal and takes the ECM out of the picture.
Pros - it cranks
Still have clutch safety interlock
Still have side stand safety interlock
Neutral light ground signal still linked to ECM
Cons - anytime you hit the starter button with the clutch pulled it will
crank
You should not have to do this, Triumph should have corrected
this for you