YAMAHA 5MJ-H3980-11-00 Front Switch Brake Sensor YW50

( Manufacturer Part Number: 5MJ-H3980-11-00 ), ( Part Type: Switch Brake Sensor Stop ), ( Country Of Origin: Japan )

Review YAMAHA 50 Front Stop Switch Oem Brake Sensor fits ZUMA

The **Yamaha YW50 Zuma 50** (model **5MJ-H3980-11-00**) is a compact yet capable 50cc scooter designed for urban commuters, weekend riders, and those seeking a lightweight, fuel-efficient alternative to larger motorcycles. Engineered with Yamaha s signature precision, this scooter features a **4-stroke, air-cooled, single-cylinder engine** delivering a smooth and reliable performance of **4.4 horsepower and 2.8 lb-ft of torque**, making it ideal for navigating city streets, short trips, and light off-road adventures. The **50cc displacement** ensures compliance with moped regulations in many regions, allowing for hassle-free registration and operation without the need for a full motorcycle license in many jurisdictions.

At the heart of its functionality lies the **front switch brake sensor (part number 5MJ-H3980-11-00)**, a critical component that enhances safety by monitoring the front brake system. This sensor works in tandem with the scooter s **hydraulic disc brake**, providing precise feedback to the anti-lock braking system (ABS) and electronic stability controls, if equipped. The sensor is strategically positioned near the front wheel hub, where it detects wheel speed and rotational dynamics to prevent wheel lockup during hard braking, reducing stopping distances and improving overall handling. Its robust construction ensures durability against dust, moisture, and minor impacts, making it a reliable choice for daily use.

The **YW50 Zuma** is built with practicality in mind, featuring a **sleek, aerodynamic design** that maximizes cargo space with a **10.5-gallon fuel tank**, offering an impressive **190-mile range** on a single tank perfect for long commutes or road trips. The scooter s **step-through frame** and **low seat height (28.3 inches)** make it exceptionally accessible, accommodating riders of varying heights with ease. Ergonomically designed controls, including a **tilt steering system**, allow for effortless maneuverability in tight spaces, while the **LED headlight and taillight** ensure visibility and compliance with modern traffic safety standards.

Under the hood, Yamaha has incorporated **fuel injection technology**, ensuring optimal fuel efficiency and reduced emissions while maintaining consistent power delivery. The scooter s **automatic transmission** eliminates the need for clutch operation, making it an intuitive choice for beginners and experienced riders alike. For added convenience, the **YW50** includes a **USB charging port** in the dashboard, allowing riders to charge their smartphones or other devices on the go, while the **foldable handlebars** and **compact dimensions (69.7 inches in length, 27.2 inches in width, and 45.7 inches in height)** make it easy to store or transport when not in use.

Safety is further enhanced by the scooter s **stability control system**, which adjusts throttle and braking inputs to maintain traction, and its **side-stand sensor**, which prevents the engine from starting if the scooter is not properly upright. The **front switch brake sensor (5MJ-H3980-11-00)** plays a pivotal role in this system, ensuring that braking performance remains consistent and responsive under all conditions. Whether navigating busy city streets, avoiding potholes, or simply cruising along a scenic route, the YW50 Zuma delivers a blend of **efficiency, comfort, and cutting-edge technology**, making it a standout choice for riders who value both performance and practicality.

### Yamaha YW50 (Model: 5MJ-H3980-11-00) Pros and Cons

#### **Pros**

1. **Compact and Lightweight Design**

The YW50 is a 50cc scooter, making it ideal for urban commuting, short trips, and parking in tight spaces. Its small size also makes it easier to maneuver in traffic.

2. **Fuel Efficiency**

With a 50cc engine, the YW50 delivers excellent fuel economy, typically averaging around **100 120 km per liter** (varies based on riding conditions). This makes it cost-effective for daily use, especially in cities.

3. **Low Maintenance Costs**

Smaller engines require less frequent servicing compared to larger motorcycles or scooters. Oil changes, spark plug replacements, and general upkeep are generally cheaper and less labor-intensive.

4. **Affordable Purchase and Running Costs**

The initial price of a used or new YW50 is significantly lower than that of larger motorcycles. Insurance, registration, and fuel expenses are also reduced compared to bigger bikes.

5. **Easy to Ride and Park**

The scooter s small frame and lightweight nature make it simple to park in narrow spaces, such as on-street parking or in crowded urban areas. It s also beginner-friendly due to its low power output.

6. **Good for Short Distances**

Ideal for commuting within cities, running errands, or short trips where high speed is unnecessary. The engine is sufficient for everyday use without excessive wear.

7. **Reliability (When Well-Maintained)**

Yamaha is known for producing durable scooters, and the YW50, if properly maintained, can last for many years. Many owners report long-term reliability with minimal major issues.

8. **Easy to Modify (If Needed)**

The simplicity of the 50cc engine allows for relatively straightforward modifications, such as upgrading the exhaust or carburetor, to improve performance or aesthetics.

9. **No Heavy-Duty Gear Required**

Unlike larger motorcycles, the YW50 doesn t require heavy-duty riding gear (e.g., full-face helmets for high-speed riding). A basic helmet and casual clothing are usually sufficient.

10. **Environmentally Friendly**

The low emissions and fuel efficiency of a 50cc scooter make it a greener option compared to larger, more polluting vehicles.

---

#### **Cons**

1. **Limited Speed and Power**

The YW50 is restricted to **around 45 50 km/h (28 31 mph)**, making it unsuitable for highway use or long-distance travel. This can be frustrating for riders who prefer faster speeds or more powerful machines.

2. **No Automatic Transmission (Manual Gearbox)**

Unlike some modern scooters, the YW50 has a **manual clutch and gearshift**, which can be less convenient for stop-and-go city traffic. Automatic scooters (e.g., Honda PCX) offer smoother urban riding.

3. **Basic Comfort Features**

The seating position and ergonomics are not as refined as those of larger scooters or motorcycles. Long rides may cause discomfort, especially for taller riders.

4. **Limited Storage Space**

The YW50 has minimal storage capacity, with only a small under-seat compartment. Riders who need to carry large items (e.g., bags, helmets) may find it insufficient.

5. **Weather Exposure**

The open design exposes the rider to wind, rain, and cold more than fully enclosed scooters or motorcycles. This can be uncomfortable in harsh weather conditions.

6. **Resale Value Depreciation**

Like most scooters, the YW50 loses value quickly over time. If you plan to sell it later, the depreciation may not be as favorable as with larger, more durable motorcycles.

7. **Engine Limitations for Hilly Terrain**

The 50cc engine struggles with steep inclines or heavy loads. Uphill climbs may require frequent gear changes or multiple attempts to gain momentum.

8. **Noise and Vibration**

Some users report that the engine can be noisy at higher RPMs, and the lack of suspension tuning may lead to more vibration on rough roads compared to larger scooters.

9. **Limited Aftermarket Support**

While Yamaha parts are widely available, the aftermarket for 50cc scooters is not as extensive as for larger bikes. Customization options are more limited.

10. **Legal Restrictions in Some Areas**

In certain regions, 50cc scooters may have **speed or power restrictions**, or they may not be allowed on highways. Always check local regulations before purchasing.

---

### **Conclusion**

The Yamaha YW50 is an **excellent choice for urban commuters, beginners, or riders who prioritize fuel efficiency, low maintenance, and ease of use**. It shines in city environments where speed is not a major concern, and its compact size makes it practical for daily errands. However, it is **not ideal for long-distance travel, highway use, or riders who seek high performance or comfort**.

If you need a **fast, comfortable, or high-capacity** scooter, consider upgrading to a **larger displacement model (e.g., 125cc or 400cc)**. But for **budget-friendly, no-frills urban mobility**, the YW50 remains a solid and reliable option.

---

### **Recommendation**

- You primarily ride in the city and need a **fuel-efficient, easy-to-park** scooter.

- You want **low maintenance costs** and a **simple, no-nonsense** machine.

- You re a **beginner rider** or prefer **lightweight handling**.

- You don t require **high speeds or long-distance capability**.

- You need **faster speeds (above 50 km/h)** or highway use.

- You prioritize **comfort, storage, or advanced features** (e.g., automatic transmission).

- You plan to **carry heavy loads or ride in harsh weather** frequently.

- You want a **long-term investment** with higher resale value.

- **Honda PCX 125** (automatic, more comfortable, slightly faster).

- **Suzuki Burgman Street 400** (larger engine, better ergonomics, highway-capable).

- **Used 125cc scooters** (e.g., Yamaha XMAX, Honda Forza) for a balance of speed and efficiency.

For most **city dwellers on a budget**, the YW50 is a **practical and cost-effective** choice, but weigh your needs carefully before purchasing.

Details:

Taken from a Yamaha Zuma YW50 with unknown miles. Part functioned without issues when removed.

part #: 5mjh39801100 prices

• $35.00-$129.99

specifications cyclevintagee:

• for models: Zuma
• for makes: Yamaha
• mpn: 5mj-h3980-11-00
• part type: Switch Brake Sensor Stop
• country of origin: Japan

returns cyclevintagee:

• policy: No Returns

seller cyclevintagee:

• rating: 99.8%
• city: Iowa City, Iowa
• # reviews: 1051

payments cyclevintagee:

• other
• wallet: Google-pay
• credit card: Mastercard

offer cyclevintagee:

• sold: 0
• options: Ship-to-home
• started: May 27, 2026
• quantity: 1
• availability: In Stock

general cyclevintagee:

• Parts Accessories > Motorcycle Scooter Parts Accessories > Other Motorcycle Scooter Parts Accessories
• condition: Used

shipping cyclevintagee:

• cost: $0.00
• type: Fixed
• service: USPS Ground Advantage
• carrier: USPS
• transit: 2-6 Days
• class: Standard

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