Does anyone know if I could put a YZF1000 cylinder on a YZF750 lower end? is the height of the cylinders the same or taller? Will the 750 head bolt onto a 1000 cylinder?

If they are the same height I should be able to use the existing mounts, exhaust and intake setup. Would the 750 head and cams flow enough air? Would I just lose a little on top and gain in the midrange?

YZF1000 engine has a longer stroke, dunno about fitting a 1000 top end to a 750 motor. Might be better to fit a complete 1000 engine. If you choose to do this you,ll need to cut 10mm. from the top engine mounts & re-weld them.

Hi Dac1915

I need the same info as you, have you seen this page? : http://www.d-murray.co.uk/convert.htm

It has some usefull info, oilpressure etc could play a part, but that should be possible to fix with a mod to the head gasket, maybe..

let me know if you find info, and ill do the same.