My Arrow's piston bosses were so worn the gudgeon pins were rattling like a bag of spanners so I've had to go for a +.020" rebore with Suzuki pistons. A shame as the bores were fine.
I know that ordinary mineral oil is recommended for running in four strokes - would the same be true for a two stroke (this is my first since a couple of MZs on the 1970s). I don't want to spend the rest of my life running it in, but neither do I want to lay down an Atlantic Convoy style smokescreen for the next couple of years.
1962 Ariel Arrow
1992 Honda CB400 Super Four ("modern" bike)