I doubt you would need to do anything to the motor itself due to your last sentence. I don't think anyone who's owned one or is in the market for one has power complaints and the Weller ECU flash\HMF combo seems to satiate those looking for just a little more. Really, anyone looking for turbo power will move up to the newly-updated YXZ as the CVT, which is nearly bulletproof in the X2\X4 isn't suitable for higher HP. Frankly, I'd love to see the YXZ's auto clutch tranny as an option in the X2\X4. I'm certain we would be seeing 70 MPH with it. Still, if Weller came out with a turbo kit for the X2\X4 that would be cool to see.