EV1010-1011 Starter ring gear & jackshaft kit, 66t

Upgrading your starter drive is a smart move for any Twin Cam or late Evolution owner. This Evolution Industries kit features a 66-tooth starter ring gear and a complete jackshaft assembly. It is designed to convert the stock 102-tooth system to the much stronger 66-tooth design, which is better suited for high-torque applications. This kit fits 1998 to 2006 Big Twin models, though it excludes 2006 Dyna models which used a different primary setup. By replacing the jackshaft and ring gear together, you get a reliable, heavy-duty starting solution that can handle the demands of a modified engine. This kit is sold individually.