dealer removed the cat on my speed twin said it wont affect the warranty. the bike is a bit snatchy at low revs I ordered a booster plug should be here tomorrow. when its up and running ill let you know what I think.
As said snake oil...basically adds a resistance to either the AFM or MAP signal so the ECU thinks is seeing more airflow and so increasing the fueling slightly...but its a global adjustment so takes no account of different loads etc, probably wont kill the engine but will likely fail the MOT on emissions.
Dealer is replacing the catalytic converter in the stock x-pipe with an aftermarket non-cat x-pipe. I hear on various web resources (example here) that this will "transform" the engine performance, tho not the snatchy throttle at low revs. The Booster plug apparently will sort that. I specifically asked if replacing cat x-pipe would affect warranty, be illegal or fail MOT. Answer is no. As bob1 says there is no emission test on motorcycles, currently. There is a noise "test" but not measured just subjective. My Harley is plenty loud and it passes MOT without a hitch.
I recon they will as most modern bikes are running essentially the same ECU setup as cars these days along with cats so it all in place.
Removed cat at first chance and increased general performance no end. With booster plug, the slow speed snatchy movement decreases and acceleration increases, due to extra fuel from ecu reading 20’ cooler. This is recalibrated by the ecu once oxygen sensors in exhaust sense to high fuel. I found rain mode great for city riding and ride mode for urban and highway. As booster is male to female adapter, you unplug for services. Cat removal does not effect warranty if done by Triumph approved workshop.
Getting the Cat removed by Pure Triumph at Woburn. I asked them about the Booster Plug, dour sounding tech guy said they do not recommend them, "best way to address the snatchy low revs is fit a Power Commander". I am sure they could supply Power Commander if requested. Not that I am cynical of course.
Let us know what you think. Individuals all say worth it, garages say no. Frankly if Triumph recommend fitting a Power Commander to cure the snatchy engine, why not sort it out in the ECU! I know emissions. Sigh.
