Hi Trev,
Where do you live? You don't even specify a country. On the off-chance you lived near someone we/they could compare EFI bikes with you.
There are several possibilities/actions that I can think of...
1. It might help to compare your bike with another 2011. I say this because the EFI does have what we call a snatchy throttle - but it is definitely not a flat spot. There are threads that discuss the snatchiness and resolutions here and over on the RAT forum. But I suspect you are talking about something else.
2. When I first had my 09 bike I stalled it 2 or 3 times taking off from stationary. In each case the engine was cold, also the idle was too slow (it should be at 1050-1100 rpm mine was about 900rpm) and more than anything, I was not giving it enough throttle and not riding the clutch enough. These engines torque curve starts to kick in above 2500rpm - they will labour (and maybe stall if cold) at less than that. If you are used to riding a low revving v-twin (like I was) you might need to get used to using higher revs.
3. You don't mention what, if anything, you have done about your air intake. With freer flowing pipes you should go to K&Ns or UNIfilter for more air to balance the freer flowing pipes.
4. If I am way off with these suggestions then you definitely need to get the dealer to resolve it. The mechanics' "just get used to it" attitude is WRONG. They don't all do this. Either he is setting the bikes up wrong (everytime!!!) or he's lazy. Take it back to the dealer. The AI removal won't affect performance AT ALL. The tune 20456 is the correct tune for TORs and aftermarket pipes so don't change back to 20455 or you run the risk of being too lean.
I repeat - aside from the snatchy throttle (which is just jerky in off-on throttle situations) - they don't do this flat spot. In fact they have an incredibly smooth power-on curve right up to the rev limiter. Check out my dyno curves in the performance forum
- click here - it's the dyno pic with SKIP'S PERFORMANCE on the chart. You will see how smooth the power delivery is and notice that the curves only start recording about 1600rpm.
I hope this helps.
EDIT: It just occurred to me that because the 2011 has different mapping to the 09 and possibly the 10 that your flat spot just might be tune related. TuneECU identifies your map as designed for up to 25% ethanol - which IS different. But regardless, Triumph wouldn't deliberately ship a bike with a flat spot like that.
2nd Edit: I realized that my link to the dyno charts and saying mine is the first chart on the page may not be true for everyone. I am choosing to display 30 posts per page - if you have your preferences set differently then the chart I am reffering to will appear elsewhere!!! My chart is the one by SKIPS PERFORMANCE.
