How does a bike with two engines joined by a chain drive (with one cyl sticking out of the top of the tank!) look good????

But seriously - why can't the Alan Millyard approach be applied to the NSR250... add one or two cylinders to the engine by making a new set of crankcase out of two. A three cylinder version wouldnt be two wide - there's 'just' be the small matter of fabricating the new crankcases and crank(!), then remaking the frame mounts to fit the thing in the NSR frame.

Sounds easy if you say it fast

Mat.