Am Freitag, 9. Dezember 2016 23:41:14 UTC+1 schrieb :

Every make you mentioned uses plain shell bearings. Very few engines are built with roller crankshaft bearings today, and those are, as far as I know, all small, high-performance 2-strokes. Even they may have switched; I haven't kept up.

Ed, do you know what metal is used for those plain shell bearings? I'd be interested to know.

Thanks,

Chris