11166 O-ring mainshaft needle bearing

This James Gaskets O-ring is a high-quality replacement for the mainshaft needle bearing seal, specifically designed for late 1984 to 1986 4-speed Big Twin models. It ensures a tight, leak-free seal in the transmission, preventing oil migration and maintaining internal pressure. James Gaskets is renowned for superior sealing technology, and this O-ring is no exception, providing a reliable alternative to the original equipment. It replaces OEM 11166 and is sold as a pack of 25, making it an essential item for workshops or anyone performing regular maintenance on these classic transmissions. Keeping a stock of these ensures you are always ready for a rebuild or a quick repair.