I bought a 317 with a blown motor and picked up a used motor out of another 317 last night. My question is what should a guy do to it to freshen it up? The past owner put a brand new engine in his 317 because he got it dirt cheap. He takes very good care of his machines and there wasn't any oil scum any where on the motor at all. This motor has been wrapped in plastic for about 9 years sitting in his garage. He said that when he removed it that it used a little oil but didn't smoke from what he can remember. I had to believe him because he looked about 85 years old and I know them old guys don't remember much any more. So should I just put rings in and hone the cylinders or should I put pistons rods and whole works in it.