ive just stripped the car down, taken it apart and rebuilt for maintenance purposes. when i had the engine out (ws711) i couuld turn the flywheel all the way round. There is still some compression, but no pinch.

It is relatively easy to turn it over, so is it time for a new piston and liner. its had about 4 gallons through it.

I heard that they say this engine is not run in until it loses its pinch. Is there any truth in this?

if the engine can still idle fine..normally they are still good...one of hte first signs of a worn out engine is an unstable idle

engine idles nice and stable, and performance is still very good. i will keep it as it is for now unless someone else has a different opinion