I bought a lightly used 2014 Rocket III Roadster from a local Triumph dealer that came with custom straight pipes the previous owner had fitted. The problem is when I close the throttle when coming to a stop the bike dies about 80% of the time. Also, the bike won't idle about 50% of the time.
I'm no mechanic but I think it's a fueling issue. The air-to-fuel ratio is off, needs a tune, the throttle bodies are out of sync.....I really don't know.
The dealer won't help, even with the extended warranty i bought, because the pipes aren't OEM. Also, that particular dealer dropped their agreement to sell Triumphs a few days after I bought mine (how convenient). All the other Triumph dealers around here want to charge me $300 to run a full service and diagnostics with no guarantee it will fix the problem.
Guys, I love Triumph and I love the bike but I need a solution to this. I don't want to dump $1000 into this bike blindly trying to figure out what is wrong.
Get the TuneECU cable from ebay or other places cost around$20.00 download the software then send Hanso a lovely how fantastic you are PM and he will supply you with a good tune for your bike, Good luck.
Forgot to say it helps to know where you are from America is a pretty big place and you never know one of our members might live close by and be able to help you.
The next thing I need to get fixed is the straight pipes. They look good and sound great but, and I never thought I'd say this, they are too dang loud! I always wear hearing protection but still have a headache if I ride more than an hour. Maybe I can fix some baffles in it or something. If anyone has any thoughts I'd love to hear them.
Suggest you do a search on this site for "Exhaust". Much depends on your goals.
I saw someone selling a stock setup here recently, and the sound and performance of the stock exhaust is just fine.
Some folks just can't help tinkering, and there are a number of options.