Hanno specs in response to Schpankme:

Bore 24 mm
Stroke 23 mm
Practical RPM - designed to run arouns 9500 rpm, but most ran them at 10,500
Weight - a little north of 19 oz without header (they are ABC, not AAC unless you got an aftermarket piston & sleeve)
Prop - APC 12 x 12, 13 x 10, 13 x 11
Pipe - OS sold anodized read pipes that were the same as Hatori 650 at first, then changed to Hatori 700 (better)

These motors were hand built, and each has a unique serial number on the mounting flange. There were two versions, Mark I and Mark II. The Mark II is a little stronger. I have heard about unlimited vertical in an 8 lb ship. I have one currently in a 7 lb ship and it has unlimited vetical.

Hope that helps.