Quote Originally Posted by T 20 View Post
Interesting stuff, Scrinja, I'd only ever known of the 90 using two different stroke lengths but now you've told us of a third --- could the 63mm stroke version be for the German market ?

I'll nip out and measure mine in a bit if it stops raining.
mine is about 80mm too, and we know the FAC is the longer. I think you might be right Mick - German 7 joule version.