Not so easy
At a minimum, probably want new heads, new pistons, new rods, new crankshaft, possibly new camshafts. Better fasteners for heads and cylinders too. Enhanced cooling system, higher-volume oil system to assist in that. Obviously new exhaust. Recalibrated ignition system with more variable timing, based on a boost sensor. Premium gas only, of course. Possibly better materials or heat treating for transmission parts, a clutch with better clamping force (or perhaps added discks with better material). Might find that the crankcase can't handle the extra force. Then the new EPA cert, never cheap.
A turbo 650 would make more sense. With a bigger cylinder bore, the 1000 presents problems with flame speed/detonation, not to mention higher loading on nearly every part of the engine.
And it still wouldn't make as much power as the BMW.
Other than drag bikes, turbo's don't usually work out well on bikes due to space and packaging limitations. Not to mention spreading the development costs over a relatively few units. And the ease of extracting absurd, excessive power from aspro I-4's.
Last edited by Jimding; 01-23-2018 at 01:59 PM.