As said I personally think it is to aide port scavenging of a two stroke.The crown head shape is pretty unusual.
Going on your user name and location I reckon it's from a prototype Stan Stevens big bore LC.....
I reckon it's from a prototype Stan Stevens big bore LC.....
a big old engineA friend of mine has this in his garden, we know it's at least 60 years old because it's been there that long! The bore is 245mm and it weighs about 6 1/2 stone. The crown head shape is pretty unusual.
View attachment 108635
So any clues what it might be out of?
An engineer told me before he died ... Eh hum... Eh hum, round & round went the great big wheela big old engine
and in and out went the xxx off steelAn engineer told me before he died ... Eh hum... Eh hum, round & round went the great big wheel