2016 ECU/EFI performance

Hi there, I must admit that I haven't ridden you exact model but I have ridden a number of different modern Triumphs and they all, to a greater or lesser degree have one issue - low throttle dodgy performance.

Between 0% and about 10% of max throttle they can feel like they stutter and this is due - imo - to a combination of design element to achieve the Euro 5 and 6 pollution levels. Both the Ai system and the O² sensor(s) feed information to the ECU to tailor the fuelling to be as lean as they can get away with, within the throttle range of you guessed it - 0 - 10% of full throttle.

So as you turn the throttle on or off, or ride on a constant light throttle, you are in this range and the fuelling is being constantly adjusted; also once over 10% of throttle this effect is reduced or completely stopped.

There are ways to stop this happening but maybe not to be applied to a brand-new, still under warranty bike.

 

I experienced a similar sensation when test riding a 2016 Speed triple R and quite frankly I didn't like it at all compared to my 2015 S. The biglad is correct, the cause of the stuttering is the new fly by wire throttle system needed to comply with the lower emissions. Basically at very low throttle openings the bike is changing between the closed and open loop circuits in the fuel injection. One has a slightly richer mixture than the other and that slight surging, or stuttering as you describe is the result. What to do about it though, that is another question.

 

I posted something similar a while ago, I can't quite put my finger on it but think I know what you mean.
I find the bike mostly smooth, but like you say, at constant speed I feel what I would describe as ' hunting' like a very gentle lurch/stammer?

 

This was very evident on the MT 09 I had, cracking motor spoiled by shit fueling and the well reported snatchy throttle response. An Australian guy, wizard with ecu's etc, did his own research and developed an O2 controller to stop the Ecu constantly switching between the closed and open loop fuel map. Search eBay for Kevxtx to see the full tech explanation.

 

Kev developed the O2 controller initially for KTM's then moved on to the Yam when he bought one, as far as I know he doesn't do one for the Triumph. You may have to consider taking it to a dyno specialist and having it set up specifically to your requirements.

 

wouldn't surprise me if the tb's are slightly out of balance. It makes a massive difference on slow speed smoothness.
No need for booster plug as it messes up adaptions and causes more problems than they are worth.

 

Use tuneecu. Turn of the oxygen sensors in the header pipes, this forces the bike to run on one setting. Closed loop I believe it's called. I have done this on my 2000 sprint when I had it, and now on my 2008 America , went one step further late last year I removed the sensors

 

can't use tune ecu on later models with immobiliser.

 

Was this issue solved?
I recently purchased a Speed triple R 2016 and having the same problem.
Chain has been replaced because is looked like there was a piece of the chain that was fault but the stutter is still there.