AllSeasons wrote:Since these engines are air cooled you can rule out water in the cylinder. Are you sure it doesn't have a tinge of blue to the color? You are most likely leaking a little oil past the valve guides. You will still get good compression because if the valves are working right it seals the compression chamber on the compression stroke. Once oil leaks past the valve guide it just sits and waits for the intake valve to open and suck it into the chamber. Once it fires it burns the oil giving you the smoke. Dirt oil or dirty air intake will cause enough damage to a guide to cause a leak. The reason that they quit smoking after start up is because there isn't enough oil introduced into the cylinder on each intake valve opening, only after it sits and collects for a while.
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