I have tried to seek reliable info about this, but have not been searching the right places so far i quess. I have Eliminator 300 slipons attached at the moment, with OEM air intake and tune. I really like the looks of K&N Aircharger... As bigger intake would lead to engine running lean, without a decent tune, i would like to know which tuner would fit this setup.

 

It might actually run OK with those changes man, many have but there's the odd one that doesn't .
TTS master tune if it don't maybe as the guy that runs it is a member here (Steve Cole) , a stand up guy who will help you out.

 

The dynojet powervision is 400$ from FuelMoto USA, And they will give you a pre-loaded tune that matches your setup.
I'd go with theirs, based on that deal alone.

 

PowerVision worked very well for me. You can keep it on the bike after the tune and use the gauges to monitor your bike's performance.

However, there are warranty issues in America if you use an aftermarket tuner. You might want to check into that. The HD Pro Street tuner is basic but fine for a stage 1, won't break your warranty.

 

As always everyone will give his own favorit tuner, well I say take a V&H FP3 it will do the job perfectly and if you realy like to monitoring and see extra gauges, it al works with your smartphone
and not as a gps like thing that sits on your handle bar. You are in Europe so prices from Fuel Moto does nothing for you, with shipping and taxes it will be overprised.

I have in use at this moment 5 x FP3 and also have the PV so I know what I'm talking about, if you like a adres for buying the FP3 in Europe I can give you one with free shipping and 10% discount,
the FP3 will cost you approx 360€ shipped.

 

If you're still under warranty you may want to consider the Screaming Eagle Tuner. My dealer where I bought my bike specifically said if I install any other tuner it would "flag my VIN" if a warranty situation came up.

 

SE pro super tuner would be my first choice, Powervision the second. I asked a base map to Steve Cole (TTS) for my configuration and after more than a year I'm still waiting for it so I didn't try the Mastertune...