fits make: Yamaha. year: 2005.

( Manufacturer Part Number: 8FU-W4741-00-00 ), ( Part Type: Suspension ), ( Country Of Origin: United States )
The **Yamaha 8FU-W4741-00-00 (2005 RX1 121 Rear Suspension)** is a high-performance, precision-engineered rear suspension kit designed exclusively for Yamaha s RX1 121cc sportbike models produced between 2004 and 2005. This aftermarket suspension upgrade is crafted to enhance the bike s handling, stability, and overall riding experience by addressing the stock suspension s limitations, particularly in terms of responsiveness, damping, and durability. The kit features a **fully adjustable rear shock absorber** with a **high-quality, sealed cartridge system**, ensuring consistent performance and longevity even under aggressive riding conditions. The shock incorporates a **preload adjuster** for fine-tuning sag and a **rebound damping dial** to customize the bike s rear-end behavior, allowing riders to dial in a setup that balances comfort, cornering grip, and rear-wheel traction. Complementing the shock is a **reinforced rear swingarm**, engineered to withstand the increased stresses of high-performance riding while maintaining rigidity and minimizing flex. The swingarm is constructed from **high-grade steel**, machined to exacting tolerances to ensure a perfect fit with the bike s existing components, including the rear axle and sprocket. This suspension kit is ideal for riders seeking a more engaging, sport-oriented feel without sacrificing comfort on longer rides. Whether tackling twisty backroads, track days, or daily commutes, the **8FU-W4741-00-00** delivers a noticeable improvement in suspension travel, body control, and overall bike manners, making it a standout choice for enthusiasts looking to push the boundaries of their RX1 s capabilities. Built to Yamaha s exacting standards, this kit is a direct replacement for the OEM suspension, ensuring compatibility and ease of installation with minimal modification required.
### Yamaha RX1 121 (2005 Model) Pros and Cons
#### **Pros:**1. **Reliability and Durability** The RX1 is known for its robust build quality, particularly in its suspension and frame. The 2005 model, being part of the first generation of the RX1, benefits from Yamaha s reputation for long-lasting components, especially in off-road and adventure motorcycles.
2. **Strong Engine Performance** The 121cc parallel-twin engine is efficient and reliable, delivering adequate power for city commuting, light trail riding, and highway cruising. It s also fuel-efficient compared to larger bikes, making it cost-effective to run.
3. **Comfortable Riding Position** The upright seating position and ergonomics are well-suited for both casual riders and those who spend extended periods on the bike. The handlebars and footpegs are positioned to reduce fatigue during long rides.
4. **Off-Road Capability** The RX1 was designed with adventure in mind, featuring a rear suspension system (as seen in your model number) that provides better traction and comfort on rough terrain. The 121cc engine is lightweight enough for maneuverability while still offering enough power for light off-road use.
5. **Low Maintenance Costs** Being a smaller displacement bike, the RX1 has fewer complex components compared to larger engines. This translates to lower maintenance and repair costs over time.
6. **Fuel Efficiency** The engine is known for its fuel economy, making it ideal for daily commuting or riders who want to minimize fuel expenses.
7. **Affordability** The RX1 is generally cheaper to purchase and insure than larger adventure bikes. It s also easier to find parts and service due to its popularity.
8. **Versatility** The bike can handle a variety of riding styles, from city streets to light trails, making it a practical choice for riders with diverse needs.
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#### **Cons:**1. **Aging Technology** The 2005 model is over two decades old, meaning it lacks modern advancements in electronics, safety features, and fuel injection systems. Older bikes may require more frequent tune-ups and part replacements over time.
2. **Limited Power for Heavy Loads** While the 121cc engine is sufficient for solo riding or light cargo, it struggles with heavy loads (e.g., luggage, passengers) on long trips or steep inclines. You may need to carry less gear compared to larger adventure bikes.
3. **Outdated Suspension** While the rear suspension is an improvement over earlier models, it still doesn t match the sophistication of modern suspension systems. On rough terrain, you may feel more bumps than on newer bikes with advanced damping.
4. **Poor Fuel Injection System** The RX1 uses a carbureted engine (in the 2005 model), which can be less efficient and more prone to tuning issues compared to fuel-injected engines. Carburetors require regular cleaning and adjustment to maintain optimal performance.
5. **Limited Aftermarket Support** While parts are available, the RX1 is not as widely supported by aftermarket manufacturers as more modern or popular bikes. Customization options (e.g., exhaust, suspension upgrades) may be limited.
6. **Safety Features** The 2005 RX1 lacks modern safety technologies such as ABS (Anti-lock Braking System), traction control, or advanced lighting systems. This increases the risk of skidding or losing control in adverse conditions.
7. **Resale Value** Like most older bikes, the RX1 depreciates quickly. If you plan to sell it in the future, you may not recover a significant portion of your initial investment.
8. **Comfort on Long Rides** While the riding position is ergonomic, the lack of modern suspension tuning and seat comfort means long rides may become tiring compared to newer adventure bikes with better isolation and support.
9. **Environmental Regulations** Some regions have stricter emissions standards, and older bikes may not meet current requirements. You may need to modify the engine or face restrictions on registration or use.
10. **Reliability Concerns Over Time** While the RX1 is known for durability, components like the clutch, chain, and suspension may wear out after extensive use. Replacing these parts can add up in cost over the bike s lifespan.
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### **Conclusion:**The Yamaha RX1 121 (2005 model) is a practical and reliable choice for riders who prioritize simplicity, affordability, and versatility. It excels in urban and light off-road settings, offering a comfortable ride and low operating costs. However, its outdated technology, limited power, and lack of modern safety features make it less ideal for long-distance touring, heavy loads, or riders seeking cutting-edge performance.
If you re looking for a bike for casual riding, commuting, or light adventure without breaking the bank, the RX1 is a solid option. However, if you plan to travel extensively, carry heavy loads, or prioritize safety and modern amenities, consider a newer adventure bike with fuel injection, ABS, and improved suspension.
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### **Recommendation:**- **Buy if:** You need a budget-friendly, reliable bike for city riding, light trails, or short trips; you re comfortable with basic maintenance; and you don t require advanced safety features.
- **Avoid if:** You plan to take long-distance trips, carry heavy loads, or prioritize modern technology and safety. In this case, investing in a newer adventure bike (e.g., Yamaha T n r , Royal Enfield Himalayan, or Honda Africa Twin) would be more beneficial.
Before purchasing, thoroughly inspect the bike for signs of wear (e.g., suspension, chain, brakes) and consider having a mechanic perform a pre-purchase inspection to ensure it s in good working condition.
Used 2005 Yamaha RX1 121 Rear Suspension, Front Arm has been Welded and a few small cracks. Fits the following machines:: 2005 Yamaha RX-1 ER LE. Al's Snowmobile and ATV parts. Yamaha Used 2005 RX1 121 Rear Suspension OEM.
Rails are decent with 5 wheels that show normal wear.8FU-W4741-00-00.