BikeMaster Rear Steel Sprocket 520 38T — Fits 1987-2021 Yamaha YFZ/YFM Series

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SKU: BKM965250
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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 Bike Master

Bike Master is the powersports parts catalog of choice — chains, sprockets, batteries, tools, and accessories for street bikes, dirt bikes, ATVs, and snowmobiles. The brand independent dealers stock for fast service.

Watch in action

High-Performance Steel Sprocket for Yamaha ATVs

Take control of your Yamaha ATV's power with the BikeMaster Rear Steel Sprocket. Engineered for the rigors of racing and trail riding, this 520-pitch, 38-tooth sprocket provides the perfect balance of strength and weight. Constructed from premium-grade steel, it is designed to endure high-impact loads while maintaining precise tooth geometry for efficient power transfer from your engine to the rear wheels.

Technical Specifications

  • Pitch: 520
  • Tooth Count: 38T
  • Material: Heavy-duty hardened steel
  • Finish: Durable black protective coating
  • Fitment: Compatible with a wide range of Yamaha YFZ450, Raptor 700, and Warrior models

Whether you are replacing a worn-out component or fine-tuning your gear ratio for better top-end speed, this BikeMaster sprocket delivers consistent results. The black finish offers superior resistance to rust and debris, ensuring your drivetrain remains reliable even in muddy or sandy conditions. Its robust construction minimizes chain slap and wear, providing a smoother ride and longer service life for your chain and front sprocket.

Designed for a direct fit on popular Yamaha sport ATVs, this sprocket is an essential component for any serious rider looking to maintain peak performance. Upgrade your machine's reliability and get back on the track with confidence. Explore our full catalog of performance parts at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2011 Yamaha YFM250R Raptor Base
2004-2013 Yamaha YFM350 Raptor Base
1987-1988 Yamaha YFM350X Warrior Base
2006-2020 Yamaha YFM700R Raptor Base
1987-1988 Yamaha YFZ350 Banshee Base
2004-2013 Yamaha YFZ450 Base
2009-2021 Yamaha YFZ450R Base

Product Details

Product Description
Part Numbers
Sizing & Fit

About Bike Master

Bike Master is the powersports parts catalog of choice — chains, sprockets, batteries, tools, and accessories for street bikes, dirt bikes, ATVs, and snowmobiles. The brand independent dealers stock for fast service.

Watch in action

High-Performance Steel Sprocket for Yamaha ATVs

Take control of your Yamaha ATV's power with the BikeMaster Rear Steel Sprocket. Engineered for the rigors of racing and trail riding, this 520-pitch, 38-tooth sprocket provides the perfect balance of strength and weight. Constructed from premium-grade steel, it is designed to endure high-impact loads while maintaining precise tooth geometry for efficient power transfer from your engine to the rear wheels.

Technical Specifications

  • Pitch: 520
  • Tooth Count: 38T
  • Material: Heavy-duty hardened steel
  • Finish: Durable black protective coating
  • Fitment: Compatible with a wide range of Yamaha YFZ450, Raptor 700, and Warrior models

Whether you are replacing a worn-out component or fine-tuning your gear ratio for better top-end speed, this BikeMaster sprocket delivers consistent results. The black finish offers superior resistance to rust and debris, ensuring your drivetrain remains reliable even in muddy or sandy conditions. Its robust construction minimizes chain slap and wear, providing a smoother ride and longer service life for your chain and front sprocket.

Designed for a direct fit on popular Yamaha sport ATVs, this sprocket is an essential component for any serious rider looking to maintain peak performance. Upgrade your machine's reliability and get back on the track with confidence. Explore our full catalog of performance parts at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2011 Yamaha YFM250R Raptor Base
2004-2013 Yamaha YFM350 Raptor Base
1987-1988 Yamaha YFM350X Warrior Base
2006-2020 Yamaha YFM700R Raptor Base
1987-1988 Yamaha YFZ350 Banshee Base
2004-2013 Yamaha YFZ450 Base
2009-2021 Yamaha YFZ450R Base

Product Details

Product Description

About Bike Master

Bike Master is the powersports parts catalog of choice — chains, sprockets, batteries, tools, and accessories for street bikes, dirt bikes, ATVs, and snowmobiles. The brand independent dealers stock for fast service.

Watch in action

High-Performance Steel Sprocket for Yamaha ATVs

Take control of your Yamaha ATV's power with the BikeMaster Rear Steel Sprocket. Engineered for the rigors of racing and trail riding, this 520-pitch, 38-tooth sprocket provides the perfect balance of strength and weight. Constructed from premium-grade steel, it is designed to endure high-impact loads while maintaining precise tooth geometry for efficient power transfer from your engine to the rear wheels.

Technical Specifications

  • Pitch: 520
  • Tooth Count: 38T
  • Material: Heavy-duty hardened steel
  • Finish: Durable black protective coating
  • Fitment: Compatible with a wide range of Yamaha YFZ450, Raptor 700, and Warrior models

Whether you are replacing a worn-out component or fine-tuning your gear ratio for better top-end speed, this BikeMaster sprocket delivers consistent results. The black finish offers superior resistance to rust and debris, ensuring your drivetrain remains reliable even in muddy or sandy conditions. Its robust construction minimizes chain slap and wear, providing a smoother ride and longer service life for your chain and front sprocket.

Designed for a direct fit on popular Yamaha sport ATVs, this sprocket is an essential component for any serious rider looking to maintain peak performance. Upgrade your machine's reliability and get back on the track with confidence. Explore our full catalog of performance parts at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2011 Yamaha YFM250R Raptor Base
2004-2013 Yamaha YFM350 Raptor Base
1987-1988 Yamaha YFM350X Warrior Base
2006-2020 Yamaha YFM700R Raptor Base
1987-1988 Yamaha YFZ350 Banshee Base
2004-2013 Yamaha YFZ450 Base
2009-2021 Yamaha YFZ450R Base

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