Yep, five speed box on mine, and had a lighter flywheel fitted. Large bore manifold and exhaust, decent airfilter on the DGV, electric fan, electric fuel pump, electronic ignition with decent plugs and leads and I am more than happy with the performance.
If mpg wasn't an issue, I'd stick a pair of webers on, or one of those bike carb conversions, or even go the whole hog with bike throttle bodies.
https://danstengineering.co.uk/Ford...e-Bodies-Kit-GSXR600-38mm-FAST-ROAD-PACK