Vortex 641ZK-45 Aluminum Rear Sprocket 45 Tooth

The Vortex 641ZK-45 is a high-performance aluminum rear sprocket featuring 45 teeth, engineered for motorcycle racing and performance applications. Manufactured from aerospace-grade aluminum, this lightweight sprocket provides optimal power transfer and reduced rotational mass compared to steel alternatives.

Key Features:

• 45-tooth aluminum construction for weight savings
• Anodized finish for enhanced durability and corrosion resistance
• Precision CNC-machined to strict tolerances
• Lightening holes reduce unsprung weight
• Compatible with 520 pitch chains

For more than 15 years, U.S.-based Vortex Racing continues to manufacture top-quality motorcycle racing components. Owned and operated by motorcycle racers and enthusiasts, each race component is made to the tightest tolerances with the best quality materials. Vortex tests on the track with direct feedback from top professional race teams worldwide, with parts put to the test by some of the world's most respected champions.

This rear sprocket is ideal for riders seeking improved acceleration and reduced weight for motocross, supercross, road racing, or track day applications. When replacing your sprocket, it's recommended to replace the chain and front sprocket simultaneously for optimal performance and longevity.