Later I saw them made by machining the metal from the head - a better way to do it as long as the chamber volume is maintained. I question any real advantage over a properly designed normal, narrow angle parallel, tight squish setup. I remember when 4 stroke motor builders dimpled their combustion chambers to promote turbulence. I haven't seen that done for quite some time. It seems that if there's a way to make people spend more money on a part - someone will make it.
Some parts look SO cool.
But looks are one thing. If you do remove the cans and CC the cases with and without them I'd be interested in knowing the difference in volume and the difference in the weight of the crankshaft. This would include base plate spacers as well as reed cage spacers. Rick Rick, your post on 2-stroke engine crankcase volume contains lots of interesting information. I ask your help explaining to me something apparently contradictory in the post.