Do you know Stephen Mitchell and the Patent of the Mitchell Construction ?

[RadlagerMike]

For now translation is missing

 

[tstidham]

I assume some form of variable cam timing using a centrifugal weight and his test bed was an xs400 engine?

 

[RadlagerMike]

it was that type of engine but the small one, the XS 250
i am searching for people from 1981 who know more of it
ore someone from NRDC who can deliver paper or whatever how it was done to get more basics for an rebuild