Serpent 903800 - Viper 989 GP Aluminum 19T Pinion Gear Race Lightweight Upgrade  [SER903800]

Serpent SER903800 Centax gear-pinion Aluminium 19T XLI Gen2
Price:
CAD$20.22
Brand:
Serpent
Model:
SER903800
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Precision Pinion Upgrade for Viper 989 GP

The Serpent 903800 - Viper 989 GP Aluminum 19T Pinion Gear is a machined aluminum pinion made to fit the Viper 989 GP. Its 19-tooth layout smooths torque transfer and helps improve drivetrain efficiency for competitive racing setups.

Lightweight Alloy Build

Manufactured from high-grade aluminum, the Serpent 903800 pinion reduces unsprung mass while standing up to regular use. The lightweight profile improves handling response and the accurate tooth form ensures consistent meshing with your spur gear.

Balanced Track Performance

With a 19T count this pinion offers a usable balance between acceleration and top speed on asphalt circuits. Use it as part of a gearing tune to refine acceleration or to stabilise handling across a variety of track conditions.

Will this pinion work with the stock Viper 989 GP motor mount?

Yes. The Serpent 903800 is designed for the Viper 989 GP drivetrain, but you should confirm motor shaft diameter and set correct gear mesh before running.

What is the best way to set gear mesh with this 19T pinion?

Loosen the motor, position the pinion for a slight tooth contact, add a feeler shim if needed, then tighten the motor and recheck mesh to avoid binding or excess backlash.

How should I inspect and maintain the pinion?

Regularly remove debris, check for chipped or worn teeth, and keep the set screw tight. Replace the pinion if teeth show significant wear to protect the spur gear.

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