RACE-DRIVEN 406839 Chain Sprocket Ring 12/40 100L

( Brand: Race-driven ), ( Part Type: Ring Chain Sprocket ), ( Manufacturer Part Number: 406839 ), ( Material: Stainless Steel )

Review RACE DRIVEN Chain And Sprocket Yamaha Yellow O ring 12/40 fits WARRIOR YFM350 350 1987–1988

The Yamaha Warrior 350 YFM350 chain sprocket with part number 406839 is an essential component of the drive system for the 1987 and 1988 models of this iconic off-road motorcycle. This O-ring chain sprocket, measuring 12/40 with a pitch circle diameter of 100mm, is specifically designed to fit the Yamaha Warrior 350's drive train.

Crafted from high-quality materials, this chain sprocket is engineered to deliver optimal performance and durability. Its robust design ensures that it can withstand the rigors of off-road riding, providing reliable power transmission from the engine to the rear wheel. The O-ring design of this sprocket ensures a tight seal, preventing the entry of debris or contaminants, which can compromise the performance of the drive system.

The 12/40 pitch of this chain sprocket is compatible with a wide range of aftermarket and OEM chains, offering flexibility for riders who may wish to upgrade or customize their Warrior 350. Installing this sprocket is a straightforward process, and it comes with clear installation instructions to help ensure a hassle-free experience.

In summary, the Yamaha Warrior 350 YFM350 406839 chain sprocket is an essential replacement part for owners of 1987 and 1988 models of this motorcycle. Its high-quality construction, durable design, and compatibility with various chains make it an ideal choice for riders seeking to maintain the optimal performance of their Warrior 350.

Buying a race-driven 40Spline 8390 chain sprocket for a Yamaha Warrior 350 YFM350 (1987-1988) with a 12/40 100L o-ring chain can have both advantages and disadvantages, depending on the specific needs and preferences of the rider. Here are some potential pros and cons:

1. Enhanced durability: Race-driven sprockets are designed to withstand the rigors of high-performance riding and racing, making them more robust and longer-lasting than stock sprockets.

2. Improved power transfer: A race-driven sprocket can provide better power transfer between the engine and the wheels, leading to improved acceleration and overall performance.

3. Customizability: Aftermarket sprockets come in various sizes and designs, allowing riders to customize their bikes to suit their riding style and terrain.

4. Aesthetics: A race-driven sprocket can add a distinctive look to the bike, making it stand out from stock models.

1. Cost: Race-driven sprockets tend to be more expensive than stock components, which could be a deterrent for some riders.

2. Complexity: Installing a race-driven sprocket may require additional tools and expertise, which could add to the overall cost and time involved.

3. Potential compatibility issues: Not all aftermarket sprockets are compatible with all bikes or chains, so it's essential to double-check the specifications before making a purchase.

4. Potential noise: Race-driven sprockets can be louder than stock components due to their design and materials, which could be a concern for riders who value quiet operation.

In conclusion, buying a race-driven 40Spline 8390 chain sprocket for a Yamaha Warrior 350 YFM350 (1987-1988) with a 12/40 100L o-ring chain can offer enhanced durability, improved power transfer, customizability, and a distinctive look. However, it also comes with higher cost, potential complexity, compatibility issues, and increased noise. Ultimately, the decision to purchase a race-driven sprocket depends on the rider's priorities, budget, and riding style. If performance and durability are the top priorities, then a race-driven sprocket may be worth the investment. Otherwise, a stock sprocket may be a more cost-effective and practical choice.

part # 406839 prices

• $25.77-$51.70

specifications utvshift:

• for models: Yfm350, 350, Warrior
• for makes: Yamaha
• for years: 1987-1988
• brand: Race-driven
• part type: Ring Chain Sprocket
• manufacturer part number: 406839
• material: Stainless Steel

offer utvshift:

• sold: 0
• options: Ship-to-home
• started: April 27, 2026
• availability: In Stock

general utvshift:

• ATV, Side-by-Side UTV Parts Accessories > Transmission Drivetrain > Other Transmission Drivetrain Parts
• condition: New

seller utvshift:

• rating: 99.8%
• # reviews: 120761

shipping utvshift:

• class: Standard, Expedited, One-day
• cost: $0.00
• carrier: USPS, FedEx
• transit: 3-5 Days
• service: USPS Ground Advantage, FedEx 2Day, USPS Priority Mail, FedEx Standard Overnight
• type: Calculated

payments utvshift:

• wallet: Apple-pay
• other
• credit card: Visa

returns utvshift:

• policy: Returns Accepted
• paid by: Seller
• time: 60 Days

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