Yamaha Oil Pilot Light Assembly 77V-85770-00-00. Overview. The Yamaha Oil Pilot Light Assembly 77V-85770-00-00 is a genuine original equipment manufacturer component designed to provide clear and reliable oil system status indication. This assembly plays a crucial role in alerting operators to low oil levels or potential lubrication issues, helping protect your engine from damage.. Engineered to Yamaha's exact specifications, this oil pilot light assembly ensures a precise fit and dependable per