Generally valve guides move when the head gets too hot. are you cylinder fins clean of dirt and debris/rats nests and the blower housing installed? (the big plastic engine cover)
Cylinder #2 part number is 84001919
Cylinder #1 is 84001918
If i am remembering correctly, since the cylinders are not even across, one is slightly higher than the other due to the connecting rods on the crankshaft, cylinder #1 is the higher of the two and #2 is lower.