PROTAPER 03-8357 Front Sprocket 520 426 5D

( Brand: Protaper ), ( Manufacturer Part Number: 03-8357 ), ( Part Type: Sprocket )

Review PROTAPER New 520 Front Sprocket Tooth 426 5d fits YZ KX WR 400 450 250 2012

Introducing the Protaper Designs 03-8357 520 Front Sprocket, specifically engineered for various two-stroke motorcycles including the Yamaha YZ400F, YZ426F, YZ450F, Kawasaki KX250, and KX500 5D models. This front sprocket is a must-have upgrade for riders seeking improved performance and durability.

Crafted from high-quality aluminum alloy, this front sprocket boasts impressive strength and rigidity. The lightweight design not only reduces unsprung weight for optimal power transfer but also ensures reduced rotating mass for quicker acceleration and responsiveness.

The Protaper 520 Front Sprocket features a 520 pitch, which is compatible with a wide range of O-ring chain brands. The 12 teeth design offers an ideal balance between acceleration and top-end power. The tooth profile is meticulously designed to provide excellent tooth engagement and durability, ensuring a long service life.

This front sprocket comes with a 15mm axle kit and a 15mm nut for easy installation. The kit also includes a Protaper decal for riders who want to proudly display their upgraded component.

The Protaper 03-8357 520 Front Sprocket is not only a performance upgrade but also an aesthetic one. Its sleek, black anodized finish not only looks great but also provides excellent protection against corrosion and wear.

Investing in the Protaper 03-8357 520 Front Sprocket means investing in a high-performance component that not only enhances the power and responsiveness of your motorcycle but also adds a touch of style to your ride. Upgrade today and experience the difference!

The Protaper 03-8357 520 front sprocket is a popular aftermarket option for various two-stroke motorcycles, including the Yamaha YZ 400, 426, 450, Kawasaki KX 250, and 5D models. This sprocket comes with several advantages and disadvantages.

1. Lightweight: The Protaper front sprocket is made of lightweight materials, reducing unsprung weight and improving handling, particularly in high-performance applications.

2. Durability: Protaper uses high-quality materials in their sprockets, ensuring better durability compared to OEM parts, which can be prone to wearing out quickly in high-performance riding.

3. Customization: The Protaper 520 front sprocket is available in various sizes to suit different riding styles and preferences. A larger sprocket increases top speed, while a smaller sprocket provides better low-end torque.

4. Improved power delivery: By changing the size of the front sprocket, riders can adjust the bike's power delivery to suit their riding style. A smaller sprocket results in better low-end torque, while a larger one increases top-end power.

5. Enhanced performance: The Protaper front sprocket can contribute to improved overall performance, including better acceleration, increased top speed, and smoother power delivery.

1. Cost: Aftermarket parts like the Protaper 520 front sprocket can be more expensive than OEM parts. However, the potential performance benefits may justify the additional cost for some riders.

2. Installation: Installing an aftermarket front sprocket requires some mechanical skills and tools. If you're not comfortable doing it yourself, you may need to pay for professional installation.

3. Potential compatibility issues: Ensure that the Protaper 520 front sprocket is compatible with your specific motorcycle model and year before purchasing.

The Protaper 03-8357 520 front sprocket offers several advantages, such as improved handling, durability, customization, and performance. However, it comes with some disadvantages, including cost, installation complexity, and potential compatibility issues. Ultimately, the decision to buy this aftermarket part depends on your riding style, budget, and mechanical abilities. If you prioritize performance and are willing to invest in quality aftermarket parts, the Protaper 520 front sprocket could be a worthwhile investment.

Details:

Kawasaki KX250 1999 - 2007. New ProTaper 12 tooth 520 front sprocket P/N 03-8357 in the original packaging. Kawasaki KLX300R 2003 - 2007. This sprocket is new.

Kawasaki KLX250 2006 - 2007.

part #: 038357 price

• $25.00

specifications fotubrak:

• for models: Yz, Kx, Wr, 400, 450, 250
• for years: 2012
• brand: Protaper
• mpn: 03-8357
• part type: Sprocket

seller fotubrak:

• # reviews: 5042
• city: Branson, Missouri
• rating: 100.0%

shipping fotubrak:

• transit: 6-12 Days
• cost: $6.00
• carrier: USPS
• class: Standard
• type: Fixed
• service: USPS Ground Advantage

general fotubrak:

• condition: New
• Suspension Handling > k Suspension Parts > k Legs Tubes

returns fotubrak:

• time: 30 Days
• paid by: Seller
• policy: Returns Accepted

offer fotubrak:

• best offers: True
• started: January 15, 2026
• options: Ship-to-home
• availability: In Stock
• sold: 0
• quantity: 1

payments fotubrak:

• credit card: Diners-club
• other
• wallet: Google-pay