Serpent SER903721 Side Pulley Set for S989 - Pair  [SER903721]

Restore Smooth Drivetrain Operation

The Serpent SER903721 side pulley set supplies two precision pulleys made for the S989 to help keep the drivetrain running cleanly. These pulleys replace worn components and are machined to withstand regular club racing and track sessions while helping maintain consistent drivetrain behavior.

Fitment and Role on S989

Built to integrate directly with the Serpent S989 layout, the pulleys support efficient power transfer and reduce drivetrain play. Use them as a direct spare when original pulleys show wear, or keep a pair in your pit bag to avoid downtime between runs.

Installation and Care Notes

Before fitting the Serpent SER903721 set, wipe all mating surfaces and inspect bearings for grit. Correct alignment and a light maintenance schedule will extend pulley life and keep gear mesh smooth for longer sessions.