Originally Posted By merpar
That is caused by piston skirt profile. I would imagine that Ross has changed their profile by now.

Ross has used tbe same skirt design for their stocking BBM pistons for 20 years, right or wrong.

I'm interested in hearing if the OP says this was found on every cylinder, or isolated to the one he posted photos.

Last edited by BradH; 05/18/18 01:08 PM.