by Charles uk » Fri Feb 18, 2011 11:52 am
As long as rings/pistons above exhaust ports fill cylinders completely with engine oil, with no air spaces replace spark plug, refix cylinders, mark flywheel position & gently warm both cylinders over the course of 10 mins with blow lamp up to circa 100 c.
Mark on flywheel will show if pistons move, failing that you will get some hot oil down the side of the pistons/rings, if pistons move then rock backwards & forwards until free, after draining oil.
Make it idiot proof and someone will make a better idiot.