HARDDRIVE SKU: 820-51225

Harddrive 31-Tooth Power Pulley - Transmission for Harley Touring & Softail

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About Harddrive

Harddrive is the house performance and replacement line built for American V-twins, covering everything from engine hardware and electrical to controls, lighting and chassis parts. The range is aimed squarely at Harley-Davidson and Indian riders who want a direct-fit part without dealer pricing, and it spans decades of model years — from Evolution-era Softails to current Milwaukee-Eight baggers.

Boost your V-twin's acceleration and responsiveness with the Harddrive 31-Tooth Power Pulley. This OEM replacement transmission belt pulley is built to original specifications, providing a reliable and impactful upgrade for compatible Harley-Davidson and Indian Motorcycle models.

Why riders pick this

  • 31-tooth transmission belt pulley for power
  • OEM replacement built to original specifications
  • Direct fit for Harley and Indian V-twin models
  • Optimizes gearing for improved acceleration

Designed for direct fitment, this 31-tooth pulley offers a specific gearing ratio that prioritizes quick power delivery. It’s an ideal choice for riders seeking a more aggressive feel from their bike's drivetrain.

Responsive Power Delivery

  • 31-tooth count for enhanced acceleration and power delivery
  • OEM replacement specification for reliable performance
  • Direct fit for V-twin motorcycle platforms with stock pulley mounts
  • Engineered for transmission belt drive systems

Tuning Your Bike's Gearing

Changing your transmission pulley's tooth count is a fundamental way to alter your bike's gearing characteristics. This Harddrive 31-tooth Power pulley is perfect for those who want to optimize their V-twin for snappier acceleration off the line and a more engaged riding experience, especially in city or spirited riding conditions. Always verify the tooth count against your current setup and consult your motorcycle's specifications to ensure proper fitment and performance alignment.

Specifications

  • Brand: Harddrive
  • Manufacturer Part #: 193002
  • UPC: 191361228865
  • Tooth Count: 31
  • Country of Origin: China (Taiwan)

Common questions

How do I confirm if this 31-tooth pulley is the correct size for my bike?

To ensure proper belt alignment and engine performance, you should check your owner's manual or examine your existing pulley for its tooth count. This 31-tooth pulley must match your bike's current setup.

Is this an OEM Harley-Davidson or Indian Motorcycle part?

This is a Harddrive aftermarket replacement pulley, manufactured to OEM specifications. While not a factory-original part, it is designed to meet the same fitment and performance standards.

Will changing the pulley tooth count affect my bike's gearing and performance?

Yes, the pulley tooth count directly influences your bike's gearing. A 31-tooth pulley typically results in more responsive acceleration compared to a higher tooth count, affecting engine RPM at various road speeds.

Ordering from Vtwinbikers

  • Brand new, sourced through authorized US distribution — never used, never grey-market.
  • Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
  • Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
BRANDHarddrive
TYPESprockets
SKU820-51225
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
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