Needed to test the theory that maybe it was the cylinder head (valves) that were at fault. So swapped over Ivy's head to Red. Also swapped back to the red cylinder jug to "reset" everything.
Fired her up and now she was absolutely blasting smoke. Filled the garage in seconds.
Then left with no choice but to do the full swap from Ivy: head, jug, and piston.
No big issues doing the swap. Fired her up and finally, only a trace amount of smoke (probably from the oil inside the muffler).
A few things to note:
- Ivy's head had the solid head gasket as opposed to the cut out. Left the solid one as it had seemed to work fine up to this point.
- Finally realized that there are 2 sizes of base plate, which line up to 2 different sized cylinder heads. The smaller 62mm base plate can fit in either. But the bigger 69mm can only ever fit in a 69mm head. Go figure...
Ran around the block and confirmed smoke issue "fixed". But seems to confirm that it was always a case of bad cylinder walls. The Ivy cylinder was very, very clean.
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