Vapour lock ?

A long shot I know but some filler caps have a vent in them that can become blocked. When you get the problem if you remove the filler cap is there a rush of air and does this help? You may have already tried this but I thought it worth a mention.
Andy

 

see this older thread

http://thetriumphforum.co.uk/threads/thunderbird-900-cutting-out.6874/

 

the cps fails when hot.after cooling down the bike starts and behaves again,it is also an intermittent problem, I am not saying it is your problem,just another possibility

 

As above ... sounds like the cps playing silly buggers. Not unknown.

 

Hi Craig, careful diagnosis is the only way to establish what is causing your bike issues.

For example there are several electronic components around the engine and all of these are known to misbehave occasionally in the manner you describe, breaking down when hot. Crank sensor is one but the ignition coils or igniters can also go tits up when hot.

I'm not familiar with your engine but I would suggest you find a way of being able to check to see if you are still getting good sparks when the engine is hot.

 

Hi. I had this problem on my 1994 trident, turned out the fuel tap has a vacuum hose - this was perished and cracked, when the bike got hot the hose responded by opening the cracks enough that vacuum dropped and so fuel flow reduced/stopped until bike stopped. Does your fuel tap have rubber hose going to car by inlets somewhere ? Hope this helps someone in the future...

 

Check for vacuum line! Tight on all fittings and not perished, as fuel doesn't flow if motor isn't running or no vacuum because of leaks.