What is the main benefit of installing an undersized pinion gear?

An undersized pinion gear, like this 31-tooth unit from S&S Cycle, changes your motorcycle's final drive ratio. This typically results in quicker acceleration from a standstill and can make the engine feel like it's working less at highway speeds.

Does this gear come with any installation hardware?

This product listing is for the 31 Tooth Undersized Pinion Gear itself. It is recommended to consult the manufacturer's installation instructions or your service manual to determine if any additional hardware or specific tools are required for installation.

Will this gear fit my specific Harley-Davidson model?

This S&S Cycle pinion gear is designed for 1999 and later Harley-Davidson Big Twin motorcycles. It fits a broad range of models within that timeframe, but it's always best to verify your specific model and year against the detailed fitment list.

S&S Cycle Pinion Gear 31 Tooth 33-4160X

Name: S&S Cycle 1999+ BT 31 Tooth Undersized Pinion Gear
Brand: S&S Cycle
Price: 132.95 USD
Availability: InStock

S&S Cycle 1999+ BT 31 Tooth Undersized Pinion Gear

$132.95

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S&S Cycle 1999+ BT 31 Tooth Undersized Pinion Gear. This gear changes your final drive ratio for improved performance.

Key Features

Fits 1999 and later Harley-Davidson Big Twin models.
Features 31 teeth for an undersized pinion gear configuration.
Changes the final drive ratio for altered acceleration and cruising characteristics.
Manufactured by S&S Cycle, a recognized name in V-twin performance parts.
Direct replacement part for the stock pinion gear.

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Will this fit your vehicle?

Product Details

This is the S&S Cycle 31 Tooth Undersized Pinion Gear, designed for 1999 and later Harley-Davidson Big Twin motorcycles. This part is a direct replacement for your stock pinion gear and is intended to alter your final drive ratio, which can lead to noticeable changes in how your bike accelerates and cruises.

With 31 teeth, this gear is undersized compared to the stock unit, meaning it will effectively change your bike's gearing. This modification is often done to achieve a different feel from the engine, whether that's quicker acceleration off the line or a more relaxed ride at highway speeds. S&S Cycle is a well-known name in the V-twin performance world, and this gear is built to their standards for reliable operation within the drivetrain.

When installing this gear, it's important to consider how the change in final drive ratio will affect your motorcycle's overall performance characteristics. You may also want to consult your service manual for the proper installation procedures and any related components that might need attention during the swap.