ORIGINAL: w8ye
I saw a Webra 60 OHC 4 stroke (if I remember correctly)
Jim
I thinking you saw the Webra T4-60 engine.
It was not OHC in Webra, it had horizontal cylindrical rotary-valve.
Webra maked these engines T4-40 and T4-60. T4-87 had Aspin rotary valve. All engines had timing belt.
Jens Eirk