Sunstar Rear Sprocket Aluminum 40t-520 — Fits Yamaha Motorcycles

SKU: FJMF_5-348540
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Sunstar

Sunstar engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Sunstar lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Precision Performance with Sunstar Aluminum Sprockets

Optimize your Yamaha motorcycle's power delivery with the Sunstar 40t-520 Aluminum Rear Sprocket. Designed for riders who demand a balance between weight reduction and durability, this sprocket is manufactured from high-grade aluminum to minimize unsprung weight, resulting in improved acceleration and sharper handling.

Why Choose Sunstar Aluminum?

  • Lightweight Design: Significantly lighter than steel alternatives to reduce rotating mass.
  • Precision Machining: CNC-machined for perfect tooth profile and chain fitment.
  • Hard-Anodized Finish: Increases surface hardness for improved wear resistance and longevity.
  • Optimized 520 Pitch: Ideal for racing and performance street applications.

Sunstar is a world leader in sprocket technology, providing OEM-quality components that deliver consistent results on the track or the street. The 40-tooth configuration is perfect for riders looking to fine-tune their final drive ratio for specific riding conditions. Whether you are competing in motocross, enduro, or road racing, this sprocket offers the reliability and performance you need to stay ahead of the pack. Installation is straightforward, making it an excellent upgrade for your next maintenance cycle. Upgrade your drivetrain today with the best in the industry at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Sunstar

Sunstar engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Sunstar lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Precision Performance with Sunstar Aluminum Sprockets

Optimize your Yamaha motorcycle's power delivery with the Sunstar 40t-520 Aluminum Rear Sprocket. Designed for riders who demand a balance between weight reduction and durability, this sprocket is manufactured from high-grade aluminum to minimize unsprung weight, resulting in improved acceleration and sharper handling.

Why Choose Sunstar Aluminum?

  • Lightweight Design: Significantly lighter than steel alternatives to reduce rotating mass.
  • Precision Machining: CNC-machined for perfect tooth profile and chain fitment.
  • Hard-Anodized Finish: Increases surface hardness for improved wear resistance and longevity.
  • Optimized 520 Pitch: Ideal for racing and performance street applications.

Sunstar is a world leader in sprocket technology, providing OEM-quality components that deliver consistent results on the track or the street. The 40-tooth configuration is perfect for riders looking to fine-tune their final drive ratio for specific riding conditions. Whether you are competing in motocross, enduro, or road racing, this sprocket offers the reliability and performance you need to stay ahead of the pack. Installation is straightforward, making it an excellent upgrade for your next maintenance cycle. Upgrade your drivetrain today with the best in the industry at GGCRACING.

Product Details

Product Description

About Sunstar

Sunstar engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Sunstar lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Precision Performance with Sunstar Aluminum Sprockets

Optimize your Yamaha motorcycle's power delivery with the Sunstar 40t-520 Aluminum Rear Sprocket. Designed for riders who demand a balance between weight reduction and durability, this sprocket is manufactured from high-grade aluminum to minimize unsprung weight, resulting in improved acceleration and sharper handling.

Why Choose Sunstar Aluminum?

  • Lightweight Design: Significantly lighter than steel alternatives to reduce rotating mass.
  • Precision Machining: CNC-machined for perfect tooth profile and chain fitment.
  • Hard-Anodized Finish: Increases surface hardness for improved wear resistance and longevity.
  • Optimized 520 Pitch: Ideal for racing and performance street applications.

Sunstar is a world leader in sprocket technology, providing OEM-quality components that deliver consistent results on the track or the street. The 40-tooth configuration is perfect for riders looking to fine-tune their final drive ratio for specific riding conditions. Whether you are competing in motocross, enduro, or road racing, this sprocket offers the reliability and performance you need to stay ahead of the pack. Installation is straightforward, making it an excellent upgrade for your next maintenance cycle. Upgrade your drivetrain today with the best in the industry at GGCRACING.

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