750 SF2 Mondial pistons

[Paul Marx]

Thanks Redax and Rez,

Since the Ross forged expand a bit more than cast, I was wondering if .003” is a bit too tight, and I,ve considered checking the oil pump. I’ve also been advised to get the skirts Teflon coated.
Regarding oil, SpeedDiagnostics who analyzed the 1300 mile mineral oil said it had lost viscosity and has a lower shear stability, so perhaps this is due to some other factors causing this.

I should think that any oil having spent 1300 miles in an aircooled full roller bearing engine, without an oil filter and sharing the engine with the gearbox, not to mention two big chains flapping around would show at least what your oil analyst found.
Paul