Serpent SER903721 Side Pulleys for S989 - Durable Pair  [SER903721]

Serpent SER903721 Pulley-set Side (2) S989
Price:
£5.96
Brand:
Serpent
Model:
SER903721
Condition:
Brand New
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Maintain Drivetrain Precision

The Serpent SER903721 side pulley set provides two pulleys designed to preserve the S989 drivetrain geometry and minimise play. Fitting fresh pulleys can make handling more consistent and help retain setup across practice and race runs.

S989 Compatibility and Benefits

Purpose made for the S989, these pulleys keep correct shaft spacing and support steady power delivery. They are a sensible replacement when original units show ridge wear, noise, or increased backlash.

Service and Setup Guidance

When fitting the Serpent SER903721 pulleys, clean the mounting area and recheck bearing condition. Confirm alignment after fitting and perform a short test run to ensure quiet, even rotation before competitive use.

Do these pulleys affect handling?

Properly fitted pulleys help maintain predictable drivetrain behaviour, which in turn supports consistent handling through corners.

Can I reuse existing fasteners?

You can reuse fasteners if they are undamaged and torqued to spec, but inspect threads and replace any worn hardware to prevent failures.

Is special lubrication required?

No special lubrication is needed for the pulley faces, but ensure bearings are appropriately greased or replaced with sealed units for reliable operation.

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