I actually found something on the differences the other day but can't
find the site again. There was the gearbox as Roger said and there was
a different injector pump mounted in a different spot. Engine layout
looks different as well. Read a couple of times that the E (ysE8) =
early, B = between(?) and M = modern. Though I am a bit dubious on
that. Would they not have thought that the E was 'modern' for its'
time...which it was. bit too much 'in retrospect' I think.
Mat it would be great if you found someone with a dodgy YSM that
needed a new engine. Just to drop it in, tighten it up and go is a
dream. I am STILL fitting my Nanni. *^&%$# Nanni with 'our easy
instillation kits'.