RPE Engine Refresh #4

Removed one of the pistons to take a better look at the rings. There are 2 main rings and an oil ring, the middle ring is supposed to be cast and coloured black. 

The edges of mine are shiny, polished and razor sharp. Seems there's no black on mine anymore, this is supposed to be a measure on how worn the rings are. Mine are clearly past their best.

As a minimum I need new rings and to clean the crown. The recommended cleaning method is scotch-brite and brake cleaner.