YAMAHA 1SL-21721-00 Fenders 1SL-21711-00

( Manufacturer Part Number: 1SL-21721-00 ), ( Type: Number Plates )

Review YAMAHA fits YZ250F

The **Yamaha YZ250F** is a legendary off-road motorcycle that has earned its reputation as one of the most versatile and high-performance dirt bikes on the market, blending cutting-edge technology with timeless Yamaha engineering. Engineered for both competitive racing and rugged trail riding, this 250cc four-stroke machine is a masterclass in precision and reliability, making it a favorite among motocross enthusiasts, trail riders, and serious hobbyists alike. At its core, the YZ250F features Yamaha s **1SL-21721-00** (for the engine) and **1SL-21711-00** (for the transmission) components, which are integral to its exceptional performance. The engine is a high-revving, fuel-injected, liquid-cooled, single-cylinder powerplant that delivers an impressive 30.5 horsepower and 20.5 lb-ft of torque, striking a perfect balance between throttle response and smoothness. Its advanced **Yamaha Power Valve (YPV)** system dynamically adjusts valve timing for optimal power delivery across the entire RPM range, ensuring both explosive acceleration and effortless mid-range control. The engine s compact yet robust design is paired with a lightweight aluminum frame, contributing to the YZ250F s agile handling and nimble maneuverability, whether navigating tight corners, jumping over obstacles, or carving through technical terrain.

The YZ250F s suspension setup is another standout feature, designed to absorb the harshest impacts while maintaining stability. It comes equipped with **WP XACT** front and rear shocks, which offer fully adjustable damping, rebound, and spring preload, allowing riders to fine-tune the bike s behavior to match their weight, skill level, and riding conditions. The front fork is a **WP XACT 48mm** unit, providing exceptional articulation and responsiveness, while the rear shock delivers precise control during aggressive riding. The bike s **Yamaha Y-Fork** design further enhances stability at high speeds, reducing trail wobble and improving cornering confidence. Complementing the suspension is the YZ250F s **Yamaha Y-TEC (Yamaha Technology for Emissions Control)**, which ensures the engine meets strict emissions standards without sacrificing performance, thanks to its efficient fuel injection and catalytic converter system.

For riders who demand both durability and customization, the YZ250F offers a robust yet modular design. The engine s **aluminum cylinder head and block** are built to withstand the rigors of high-stress riding, while the **Yamaha YCC-I (Yamaha Chip Control Integrated)** system allows for easy tuning via the **Yamaha YCC-Tuner** app, enabling riders to adjust parameters like ignition timing, fuel delivery, and throttle response with a few taps on their smartphone. The bike s **Yamaha Y-Frame** construction not only reduces weight but also improves rigidity, translating to sharper handling and better power transfer. Additionally, the YZ250F s **Yamaha Y-Front Suspension (YFS)** system ensures consistent performance, even under extreme conditions, while the **Yamaha Y-Rear Shock (YRS)** provides adaptable damping for both motocross and trail riding. The bike s **Yamaha Y-Damp** technology further refines the suspension s responsiveness, absorbing bumps and vibrations with precision.

Beyond its mechanical prowess, the YZ250F is a rider-focused machine, designed with ergonomics and accessibility in mind. The **Yamaha Y-Saddle** offers a comfortable yet sporty riding position, reducing fatigue during long sessions, while the **Yamaha Y-Handlebar** provides a secure and adjustable grip for better control. The bike s **Yamaha Y-Pegs** are strategically placed for optimal foot positioning, enhancing stability and responsiveness. Safety is also a priority, with features like **Yamaha Y-Brakes** (front disc and rear drum) that deliver reliable stopping power, and a **Yamaha Y-Side Stand** that ensures the bike stays upright when parked. The YZ250F s **Yamaha Y-Exhaust** system not only contributes to its sporty sound but also optimizes engine efficiency, while the **Yamaha Y-Fuel Tank** holds a generous 2.2 gallons, allowing for extended riding without frequent stops.

Whether you're tearing up the motocross track, exploring rugged backcountry trails, or pushing the limits in enduro racing, the **Yamaha YZ250F** is a dirt bike that delivers unmatched performance, reliability, and versatility. Its **1SL-21721-00 engine** and **1SL-21711-00 transmission** are the backbone of its power delivery, ensuring smooth and consistent performance under demanding conditions. With its advanced suspension, precise handling, and rider-centric design, the YZ250F is not just a dirt bike it s a statement of Yamaha s commitment to innovation and excellence in off-road motoring. For riders who refuse to compromise, the YZ250F is the ultimate choice, offering a perfect blend of power, agility, and durability that sets it apart from the competition.

**Pros and Cons of buying a Yamaha YZ250F (Models 1SL-21721-00 and 1SL-21711-00)**

### **Pros**

1. **Reliability and Durability** Yamaha s YZ250F is widely regarded as one of the most dependable and long-lasting dirt bikes in its class. The engine, suspension, and drivetrain are built to withstand heavy use, making it a favorite among racers and weekend riders alike.

2. **Performance and Power** The YZ250F features a high-revving, single-cylinder engine that delivers strong acceleration and a broad powerband. The 249cc air-cooled engine produces around 26 horsepower, which is competitive for its class. The bike s lightweight frame (around 210 lbs) enhances agility and maneuverability, making it excellent for motocross and trail riding.

3. **Proven Suspension** Yamaha s suspension setup, including the WP XACT shock and inverted fork, is highly adjustable and durable. This allows riders to fine-tune the bike for their weight, riding style, and track conditions, improving comfort and performance.

4. **Maintenance and Repairability** The YZ250F is known for its straightforward maintenance requirements. Many parts are easily accessible, and Yamaha s reputation for quality means that replacement components are widely available. This makes long-term ownership more cost-effective compared to some competitors.

5. **Resale Value** Yamaha dirt bikes, particularly the YZ250F, hold their value well. If you decide to sell or upgrade later, you re likely to recoup a significant portion of your initial investment.

6. **Versatility** The YZ250F is suitable for a variety of disciplines, including motocross, enduro, and trail riding. Its balanced design and performance make it adaptable to different terrains and riding styles.

7. **Pro Support and Racing Heritage** Yamaha has a strong history in motocross, and the YZ250F has been a staple in professional racing. This means you re buying into a bike with a proven track record, and there s a wealth of aftermarket support, upgrades, and tuning options available.

8. **Fuel Efficiency** Compared to larger displacement bikes, the YZ250F is fuel-efficient, making it cost-effective for long rides or frequent track sessions.

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### **Cons**

1. **Single-Cylinder Limitations** While the YZ250F s engine is powerful for its class, it lacks the torque and low-end power of some two-stroke or larger four-stroke bikes. This can make it feel less dominant in heavy-duty motocross or when carrying extra weight.

2. **Vibration and Noise** Single-cylinder engines are notorious for producing noticeable vibrations, which can lead to rider fatigue during long sessions. The engine is also loud, which may be an issue if you ride in noise-sensitive areas or prefer a quieter bike.

3. **Weight Distribution** The YZ250F s weight is concentrated toward the rear due to its single-cylinder layout. This can make it slightly less stable at high speeds or during aggressive cornering compared to bikes with more balanced weight distribution.

4. **Aftermarket Costs** While the bike itself is reliable, aftermarket upgrades (e.g., suspension, exhaust, or engine tuning) can add up quickly. Some riders may find that they need to invest in additional parts to fully optimize the bike for their needs.

5. **Fuel and Oil Consumption** The YZ250F burns fuel and oil relatively quickly, especially during aggressive riding. This means more frequent refueling and oil changes, which can be inconvenient for some riders.

6. **Limited Modern Tech** Compared to newer bikes with advanced electronics (e.g., traction control, launch control, or electronic suspension), the YZ250F is a more "old-school" design. While this doesn t necessarily detract from its performance, it may feel outdated to riders who prefer modern conveniences.

7. **Parts Availability Over Time** While Yamaha parts are generally easy to find, some older or less common components (e.g., specific suspension parts or rare accessories) may become harder to source as the bike ages. This is less of an issue for newer models but something to consider for long-term ownership.

8. **Learning Curve for Beginners** The YZ250F s power and agility can be intimidating for novice riders. Its lightweight frame and high-revving nature require a certain level of skill to handle safely, especially on technical trails or in motocross.

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### **Conclusion**

The Yamaha YZ250F (models 1SL-21721-00 and 1SL-21711-00) is a fantastic dirt bike for riders who prioritize reliability, performance, and versatility. Its proven track record, durability, and strong aftermarket support make it a smart investment for both amateur and experienced riders. The bike s single-cylinder engine and lightweight design deliver an engaging riding experience, particularly in motocross and trail riding.

However, the cons such as vibrations, noise, and the limitations of a single-cylinder engine may not appeal to everyone. Riders who prefer modern electronics, lower-end torque, or a more refined ride might consider alternatives like the Honda CRF250L, Kawasaki KLX230, or even some two-stroke bikes for a different experience.

If you re looking for a bike that will last, perform well, and hold its value, the YZ250F is an excellent choice. It s particularly well-suited for riders who enjoy the challenge of a high-revving, single-cylinder engine and don t mind the trade-offs for the sake of reliability and racing pedigree.

### **Recommendation**

- You re a serious rider who values durability, performance, and a proven track record.

- You plan to use the bike for motocross, enduro, or trail riding and want a lightweight, agile machine.

- You re willing to invest in maintenance and potential upgrades to optimize the bike for your needs.

- You prefer a bike with a strong aftermarket community and easy access to parts.

- You prioritize low-end torque or modern electronics (e.g., traction control).

- You re a beginner who may struggle with the bike s power and agility.

- You prefer a more refined, less vibration-heavy ride.

- You re looking for a bike that s easier to ride in urban or noise-restricted areas.

For most riders seeking a balance of performance, reliability, and value, the Yamaha YZ250F is a top-tier choice. Just be prepared for the bike s quirks like vibrations and fuel consumption and enjoy the rewarding riding experience it provides.

Details:

Will need cleaned up has sticky graphic residue that dirt see pictures thanks.

part #: 1sl2172100 prices

• $24.51-$37.99

specifications febocy:

• for models: Yz250f
• for makes: Yamaha
• mpn: 1sl-21721-00
• type: Number Plates

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• condition: Used
• Motorcycle Scooter Parts Accessories > Body Frame > Fenders

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• # reviews: 117
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• started: February 2, 2026