RE: Webra 10 CCM
It is a 60 size engine. Depending on the model it may be a ringed engine. I have a Blackhead that is ringed.
They are dependable, good running engines, however, by todays standards, they are on the heavy side. (Mine is about 1 - 1 1/2 oz heavier than my Thunder Tiger 61) The other thing is that todays 46 - 52 2 strokes have comparable power. Still a great engine though.