02 1200 Trophy-semi dead

[dewing]

Hope someone can help. Took my 02 1200 Trophy in last week for 12k service.Get it home,2 days later it stopped about 1/2 mile after i left work.It coughed like it was cold, then started running on 3, 2 1 cylinder and quit.Got it home on a trailer, next morning it started.
Ran like it was flooding.I orderd and installed a new ignition sensor. Fired up and ran good.Today, aweek later, it is sitting in the parking lot at work. I started it up, let it warm up (just a little choke for 15 seconds) while i put on my helmet and gloves. Started to leave, it starts running rough. I gassed it up to about 6k on the tach, it cleared for about 2 seconds, then the 3,2,1 cylinder stop sequence again. I am PO"d as the stealer charged $603 for the service. It has never left me on the road before this. Anyone have any suggestions?
Thanks
Donnie Ewing
Pumpkin Center,NC

[maddjack]

Pull the plugs see what they look like first off.Go from there and tell us what you find

[rgbeard]

These are NOTORIOUS for having the ignition coils fail.  The replacement Triumph ignition coil is okay - a company named Nology makes one that's generally known as better.

[bajajoaquin]

+1 on the coils. I can't give a fully-authoritative response yet, because I'm waiting for my new coils to arrive. However, I exeperienced a similar set of symptoms. I thought it was carb-based, but my shop put the bike on the sniffer and said it ran fine. I got it home, and it didn't.

On thier recommendation, I re-gapped the plugs to .020, to make it easier for the spark to jump the gap. It ran fantastic for a few days. However, I think the coils are getting worse, because I'm getting the problem back.

Try the plug gap. If it works, look for coils. I've got the PN here somewhere.