I am currently rebuilding my KA100 and found that there are 2 piston pin options. Pin “red” and pin “blue”. Can someone maybe chime in and explain the differences? I could not find any information on it and the IAME manuals didn’t help much. I assume one is a standard diameter and the other is slightly bigger? I don’t want to have to buy both if I don’t need to.
You are correct with assumption on it being different sizes. When you get a piston there should be a coloured dot underneath that identifies what size the pin bore has measured up to. Std size is most common. Red is a slightly larger pin diameter.