Here a couple of quotes, from someone who appears to know all about everything.................."You mean Mahle in Germany made Moto Guzzi motorcycles? Well I learn something new every day"
Nigusil is a patented metal alloy created by Moto Guzzi for motorcycle cylinder liners. The name is an acronym for Nickel-Guzzi-Silicon.
Moto Guzzi, having successfully created the first engine with a chromed cylinder lining, continued research to find a material that could replace chrome. The research culminated with Nigusil, a nickel-silicon alloy applied to the cylinder through special procedures. This innovation allowed lower friction coefficient in the engine, significantly lower levels of mechanical parts wear, and considerable savings of lubricant. Treatment of cylinders through Nigusil was also used by many manufacturers, Maserati among them, and generally on racing engines.
Here's another ............... "Shirley your not alluding that replating is as easy and as simply running a hone down a steel/iron liner?"............................. When a bore is damaged "running a hone through" will not cut the mustad.(type of hook , I know!) A rebore will.. Oh? you can't actually rebore some cylinders? You mean I have to buy new cylinders too? and pistons? Perhaps Nigusil or Nikasil might be a better choice? Ha ha