Please Help! 93 Trophy 1200

Have you checked the carb balance and float heights?

 

You mean you didn't check the plugs first .......so you have cleaned the carbs twice now and still have a problem ...the fuel tap is vacuum but has a prime position and it still stutters/misses on that?
Next as said check throttle slide synchronisation and also make sure float heights are correct.

 

You’re getting mixed up there Peter it’s a carb balance and float height check.
Have you got a workshop manual for the bike? If not, I’d definitely recommend you get a Haynes as a minimum which will outline the procedures needed.
The carb balance will ensure that the fuelling to all the cylinders is equal and the float heights need to be equal to allow each carb to give the same fuel delivery rate.

 

https://www.dropbox.com/s/ia2hex5rw70pip4/Triumph T300 Service Manual.pdf?dl=0

Hope this helps you, also owners handbook

https://www.dropbox.com/s/a67oymz7es51402/Triumph T300 Owners Handbook.pdf?dl=0

 

If its dying at higher rpms then it will most likely be fuel related...check fuel flow from tap ...maybe internal tap screen is partially blocked, also double check that the correct size main jets are fitted and the needle clips are in the correct groove.

 

It’s very easy to trap a fuel line when putting the tank back on on these bikes. Try the tap in the prime position, if it’s good then you could have just nipped the main feed.

 

PeterAustin88.
Get a good fuel and head cleaning solution dump it in the tank and ride the thing as much as you can. You may have to do it a couple of times but hopefully it will clean and flush the whole system.
Ride Safe
Joe.