fits make: Yamaha. year: 1987–2001.

( Manufacturer Part Number: 1YU-11311-00-00 ), ( Part Type: Cylinder ), ( Machine Type: Scooter ), ( Compatible Model: Razz 50, Sh 50 ), ( Universal Fitment: No ), ( Compatible Year: 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 1987 )
The **Yamaha 1YU-11311-00-00 Cylinder** is a meticulously engineered component designed exclusively for the iconic **Yamaha Razz 50cc** scooter models produced between **1987 and 2001**. This high-performance cylinder is a critical part of the scooter s air-cooled, single-cylinder, two-stroke engine, delivering a perfect blend of reliability, efficiency, and power. Crafted from premium-grade cast iron, the cylinder features a **smooth, precision-machined bore** that ensures optimal piston sealing and minimal friction, contributing to a cleaner burn and improved fuel economy. The **OEM-compatible design** guarantees an exact fit with the Razz s original engine assembly, including the piston, rings, and gaskets, allowing for seamless integration without the need for modifications. Whether restoring a classic Razz to its former glory or upgrading an existing engine for enhanced performance, this cylinder is built to withstand the demands of daily commuting, weekend rides, or spirited cruising. Its robust construction and durable finish make it resistant to warping, corrosion, and wear, ensuring long-term durability even under heavy use. For enthusiasts seeking a genuine Yamaha replacement part, this cylinder is the ideal choice combining authenticity with the performance standards that Yamaha is renowned for. Whether you're a mechanic, a collector, or a rider looking to maintain peak efficiency, the **1YU-11311-00-00 cylinder** is a must-have component for preserving or reviving the legendary Razz s legendary charm and capability.
### Yamaha 1YU-1YU-11311-00 (50cc, 4-stroke, 1987 2001) Scooter: Pros and Cons
#### **Pros:**1. **Reliability and Durability** The 1YU engine is a well-regarded 4-stroke design known for longevity, especially when maintained properly. Many units easily exceed 100,000 miles with basic upkeep.
2. **Fuel Efficiency** At 50cc, this scooter offers decent mileage (around 100 150 mpg), making it cost-effective for short commutes or urban use.
3. **Simplicity and Low Maintenance** Compared to modern scooters, the 1YU has fewer electronic components, reducing long-term repair costs. Basic maintenance (oil changes, spark plug adjustments) is straightforward.
4. **Affordability** Parts are widely available and inexpensive, and the scooter itself is often sold at low prices due to its age. Restoration costs are minimal compared to modern models.
5. **Lightweight and Maneuverable** The small engine and simple design make it easy to handle in tight spaces, ideal for city riding.
6. **Classic Appeal** If you prefer a vintage or retro look, this scooter has a nostalgic charm that modern scooters lack.
7. **No Major Electronic Issues** Unlike newer scooters with complex ECUs or ABS, the 1YU runs on basic carburetion, reducing the risk of electronic failures.
8. **Good for Beginners** The simplicity of the engine and drivetrain makes it a good learning tool for those new to scooters or small motorcycles.
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#### **Cons:**1. **Poor Performance** The 50cc 4-stroke is underpowered, struggling with hills, high speeds, or heavy loads. It s best suited for flat terrain and light use.
2. **Outdated Safety Features** No modern safety tech (ABS, traction control, or advanced braking) means longer stopping distances and reduced stability at higher speeds.
3. **Comfort Limitations** Older scooters lack modern ergonomics (e.g., poor seat padding, cramped footpegs, and limited wind protection). Long rides can be uncomfortable.
4. **Rust and Wear** Many units from this era suffer from rusted frames, worn suspension, or degraded rubber components (tires, seals). A thorough inspection is critical.
5. **Emissions and Legal Issues** In some regions, older 50cc scooters may not meet modern emissions standards, potentially requiring modifications or registration restrictions.
6. **Limited Aftermarket Support** While parts exist, modern alternatives (e.g., electric scooters, larger 125cc models) offer better features and reliability.
7. **Fuel and Environmental Concerns** Gasoline-powered scooters contribute to pollution, and fuel costs add up over time compared to electric alternatives.
8. **Resale Value** Vintage scooters depreciate quickly, and finding buyers for a restored unit can be difficult compared to newer models.
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### **Conclusion:**The Yamaha 1YU-11311-00 is a **budget-friendly, low-maintenance scooter** best suited for **casual riders, beginners, or those who prioritize simplicity over performance**. It excels in **urban environments where speed and power aren t critical**, and its low cost makes it an attractive option for restoration projects. However, its **lack of modern comfort, safety, and efficiency** means it s not ideal for frequent long-distance riders or those seeking a hassle-free experience.
If you re looking for a **reliable, cheap-to-own scooter** for short trips and don t mind its limitations, this model is worth considering **but only if you re prepared for basic maintenance and potential rust issues**. For most riders today, a **modern 50cc or 125cc scooter** (e.g., Honda Cub, Yamaha NMAX, or electric scooters) would offer better value in terms of comfort, safety, and practicality.
### **Recommendation:**- **Buy if:** You need a **low-cost, simple scooter** for occasional use, enjoy tinkering with mechanics, or want a **vintage-style ride** without heavy investment.
- **Avoid if:** You require **comfort, safety features, or performance** for daily commuting, or if you re unwilling to perform regular maintenance.
- **Alternative Considerations:**- For **modern simplicity and reliability**, a **used Honda Cub or Yamaha NMAX** (50cc/125cc) is a better choice.
- For **efficiency and low running costs**, an **electric scooter** (e.g., Xiaomi Pro 2, Gotrax) may be more practical long-term.
- If you re restoring, **budget extra for suspension, tires, and frame repairs** these are common weak points.
Ultimately, this scooter is a **great entry-level or hobbyist project**, but not a practical daily driver for most riders today.
Removed from a running 2000 Yamaha Razz 50cc with 8,801 miles. See photos for exact condition. Genuine OEM Yamaha Cylinder Part Number: 1YU-11311-00-00 Used part in good working condition. Fits 1987 2001 Yamaha Razz.