Contact Chris from flying brick.
+1, he may just be able to turn Rade's arm

Can you give some feedback on the boosterplug on the 701? Especially when you have installed the Twin air filter
I will, but what it does I've already said.
Look, this is not a PC-V or a remap, it is a simple 'trick', and quick to install (or remove) also.
I like simplicity because this also means reliability, and the one on my F800GS-Adv never has given me problems.
It takes the 'hesitation & stumbling', especially low down, away for most of it, and it works exactly when you want it: when you open the throttle.
During coasting (like on a highway) it reverts to closed loop which means the ECU measures from the O2 sensor and injects according to its standard (lean-ish) map which means you'll largely keep your low consumption figures during A2B stuff.
During startup & idle this Booster Module also works, it's said to make it a little easier.
Rade says their filter, without any mods fuelwise, makes 3 to 4 horses more, plus of course a little more torque.
That points to a free-er breathing filter or to a previously-restricted one, and if one looks at the std airbox then I bet it'll be a lil of both.
But, some reading on the net learned me the std paper filter seems to let some fine dust past - a big nono in my books, and for an OEM unit this is quite bad actually.
Dunno about this for sure though, haven't opened mine yet - but I
do know that TwinAir, the actual inventors of the oiled open cell foam filter, are good filters, even when
buried in mud (I've serviced some motoX bikes, amazing to see this actually).
So, a better filter
plus more fuel onboard, add a fuel tap so one cannot be caught out (no fuel-gauge remember), and all this without adding to the bulkyness of this slim offroad bike is a no-brainer for me.
However, those who want the last ounce of performance, say SM racers, will install the Rottweiler filter (bigger surface hence likely to flow even more air), an open pipe plus a PC-V, and next dyno the thing.
Will load the performace Akrapovic fuel map during first service and report on performance increase if any.
Mind W@nted, pls tell me how that works?
Plug in a laptop or something like that, diy I mean, or does one has to go to a dyno-room?
Curious, let us know please!