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Vortex 840ZKV4-39 VTX Aluminum Rear Sprocket 39-Tooth

Manufacturer

Picture for manufacturer Vortex

Part Number

840ZKV4-39
9 reviews
Sale Price

$73.91

Estimated ship date Saturday, November 28

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Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Vortex 840ZKV4-39 is a 39-tooth aluminum rear sprocket from Vortex Racing's VTX series, engineered for riders seeking a lightweight, high-performance alternative to stock steel sprockets. Machined from aircraft-grade aluminum, this sprocket delivers excellent strength-to-weight savings without sacrificing durability.

Key Features:

  • 39-Tooth rear sprocket for optimized acceleration and gearing tuning
  • Precision CNC-machined from high-grade aluminum for reduced unsprung weight
  • Hard-anodized finish for corrosion resistance and extended service life
  • Lightening holes reduce rotational mass for improved throttle response
  • Direct OEM-style fitment — no modifications required
  • Compatible with 520-pitch drive chain (840 series)
  • Meets Vortex's stringent quality and dimensional tolerances

The Vortex VTX aluminum rear sprocket is a popular upgrade for street and track riders looking to fine-tune their motorcycle's final drive ratio. Paired with a quality 520 chain, the 840ZKV4-39 provides a precise, reliable connection between engine and wheel.

Delivered quickly as promised!

I arrive my order on time and very good quality in the parts, thank you.

I haven't used it yet, waiting for other items to arrive.

Shipped quickly. Easy to order

Ordered Enkei brand hubcentric rings, company sends Coyote brand hubcentric rings. Will they work, yes but it's a classic bait-n-switch sales tactic. Wish THMotorsports was upfront & honest with their customers.

Good service and quick shipping

Hope I get my order thanks you

Fast, easy, hopefully trust worthy. Upon receipt of order, I'll up date my comments. Thank you.

I would like to rate 5 stars. However item description doesn't contain 3 year old manufacture date.

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