# Vortex Racing V4 40 Tooth 520 Rear Sprocket - Black

The next generation of Vortex aluminum rear sprockets, V4 builds on the long-running CAT5 sprocket platform with a lighter, more aggressive design. Reduced rotating mass improves acceleration, throttle response, handling, and overallagility. Ideal for street, track, and performance applications.

-   Excellent concentricity for smooth, quiet operation and efficient power transfer
-   Precision-machined from high-strength 7075-T6 aluminum
-   10-15% Lighter than CAT5
-   Manufactured in the USA

This Part Fits:

Year

Make

Model

Submodel

1996-1997

KTM

360 EGS

Base

2005-2006

KTM

625 SMC

Base

2003-2004

KTM

625 SXC

Base

2005-2006

KTM

660 SMC

Base

2008-2011,2013-2018

KTM

690 Duke

Base

2008-2009

KTM

690 SMC

Base

## Details

- **Price:** 122.54 CAD
- **Vendor:** Vortex Racing
- **Type:** Sprockets

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 122.54 CAD | In stock |

## Images

- Photo - Primary
- Photo - Close Up

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/vortex-racing-v4-40-tooth-520-rear-sprocket-black-1)
> Updated: 2026-09-12