G200-G290 12x28x8mm Ball Bearing K603406001 Compatible with Zenoah Engines  [K603406001]

12x28x8mm Ball Bearing for G-Series Performance Engines

The Zenoah K603406001 12x28x8mm bearing is intended for rotating components in small RC engines. It fits the G-series engine models listed and replaces worn bearings to regain smooth shaft rotation and lower frictional losses.

Assembly tips: extract the old bearing cleanly and protect the crankcase from swarf. Press the replacement bearing in squarely using the outer race as the drive surface, and confirm the shaft runs true before final assembly. Minimal, appropriate lubricant on the rollers helps initial running.

Performance impact: fitting a fresh 12x28x8mm bearing reduces drag and heat at high RPMs, supporting consistent throttle response and protecting neighboring seals and journals when correctly installed.