Burns oil when cold
Valve seals dried out and cracked off the stems. Oil is draining down while it sits into the manifold/exhaust ports. Spark plugs all out, stuff some rope in the spark plug hole, bring the piston up to hold the rope/valves up, compress the spring, remove the keepers and replace the seal on both intake and exhaust valve stems. Reinstall parts, lower piston and pull out rope. Repeat 7 more times.
Valve seals dried out and cracked off the stems. Oil is draining down while it sits into the manifold/exhaust ports. Spark plugs all out, stuff some rope in the spark plug hole, bring the piston up to hold the rope/valves up, compress the spring, remove the keepers and replace the seal on both intake and exhaust valve stems. Reinstall parts, lower piston and pull out rope. Repeat 7 more times.
