RE: OS 61 Hanno Special question
Same question from me - I cannot tell from outside difference between the MKI and the MKII. There may be little difference in timing?
I had chance to ask Hanno Prettner himself about 2 years ago, he told that in his eyes the MKI had a little more power, but he did not explain why he believes this is so.
MKI was available as ABC only, MKII both ABC and with ringed piston. Could it be OS made the MKII in ringed version, since there have been some problems with the cylinder nickel plating peeling off?