I'm seeking some advice and anecdotal experience with ordering piston rings for Nikasil cylinders. I have a 1981 R65 (production 9/80) with Nikasil cylinders. From my research the rings are not available individually, only as a set for each piston as OEM part# 11 25 1 337 401. I'm trying to locate a complete set (Lt & Rt) as soon as possible and am wondering if any of you have experience with a local US supplier outside of ordering through a certified BMW dealer. I've checked with both of my local dealers and they each tell me the kits are available in US warehouse with a delivery time of 5 working days.
Any information and personal experience along with a specification sheet for these specific piston rings is greatly appreciated.
It's a long story...