And just in case there is anyone here unfamiliar with Allen Millyard:
An early fascination with Kawasaki two-strokes resulted in the conception of in-line four-, five- and six-cylinder engines based on factory-made triples. Without wishing to make the task seem any less than formidable, adding extra cylinders to an air-cooled two-stroke was simple compared with later projects.
Full story at
www.telegraph.co.uk/motoring/motorbikes/...ll-his-own-work.html
And there was a thread here on KZR over five years ago when the five cylinder Kawasaki was listed on eBay.
kzrider.com/archive/viewthread.php?tid=26399