I have a Storm '25 model and ordered BT Moto ECU read/write gadget

I had to do a U turn the other day and I noticed the same thing, it definitely has to do with the fuel because you can do a low speed U turn and not really have to fidgit with the gas to give it a bit more torque for the turn, you just let off the clutch a bit more or gove it slightly more gas.

I've noticed when running a gear to is low point like below 2000 rpm that it doesn't seem to mind it as much as it did before the fueling was changed, it doesn't lug as much at the low rpms now.

Even just taking off from a light is better now, last summer I stalled it a few times and zi highly doubt that will happen this year with the change the BT tune made.