Topic: 550 jugs/cylinder head on a 500 bottom end?

[alacrity]

Is this a terrifically stupid idea?
Or a terrific idea?
I know the clutch/gearbox is "better" on the 550, but I have a 500 sitting on my garage floor.  The cylinder fins are busted on one side from a P.O. crash, and I'd like a bit more pop... so I thought maybe an extra 50cc would do the trick?  I'd order new gudgeon pins/circlips and assuming the crankpins are in good shape... bolt the fugger up and smile. 

Could it be that simple? (asked the simpleton).

 

[DavePhipps]

The sleves are bigger on the 550 cylinders. You'll have to bore the cases to match.

[alacrity]

ah. Thanks for the info Dave.

Perhaps I'll leave well enough alone and just get this old girl running.

The NEXT one I build will start life as a 550.
;-)