Just for your info I have scaned a engine review on Early 60 size engines taken from RCM&E May 1968
It show's that the Early Baffle Piston 61 Webra was very powerful for its time !!!
I have one I bought from the UK for 8 Quid

!!! on *bay, it is a very nice engine the one I have is like new and power's a Senoir Falcon like a missile at full Thottle.
I like bargin Engines