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Does NOT look like Mark or Moe’s work either. Two different decals on the tank, or am I just seeing things?
Could have had the original pistons and cylinders sent to millennium technologies for plating, and there would be no mark. He'll have to ask the seller. One clue, the cylinder patina is different from the cylinder head. It could be nothing, but it's a clue.
Not all Gilardonis have the cast in name between the fins. If there's any question about what the cylinder bore material is, the magnet test will give a simple, accurate answer in just minutes.
What is Nykosil ? Peter
Easier to search if it's spelled correctlyI think it's very popular for dirt bikes, according to Stan you can seize it and not do any real damage.https://en.wikipedia.org/wiki/NikasilI'm sure a long time mechanic like you must have struck it lots of times, maybe know it under a different name. Mongoose can do it.
If I remember correctly, very light magnetism indicates Nykosil, right?