BFO S1JUYA Handlebar Start Switch 4KB-83973-00-00 4KB-83973-20-00

( Brand: Bfo ), ( Manufacturer Part Number: S1JUYA ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Color: Black ), ( Compatible Year: 2004, 2003, 2002 ), ( Fitment: For Yamaha Bear Tracker Yfm250x 2002-2004 ), ( Function: Switch Start, Switch Engine On Off, Switch Headlight Hi Lo Off ), ( Ipn: 4kb-83973-00-00 4kb-83973-20-00 4kb-83973-21-00 ), ( Machine Type: Atv ), ( Manufacturer Warranty: 2 Years ), ( Material: Plastic, Metal ), ( Placement On Vehicle: Left ), ( Type: Headlight Switch ), ( Universal Fitment: No )

Review BFO Handlebar Start Stop Switch Yamaha fits BEAR TRACKER YFM250 2002–2004

The **BFO S1JUYA Handlebar Start Switch** is a meticulously engineered, high-performance replacement part designed specifically for Yamaha s iconic **YFM250 Bear Tracker** models produced between **2002 and 2004**, corresponding to the original equipment part number **4KB-83973-20-00**. Crafted with precision and built to exacting standards, this switch serves as both a functional and stylish upgrade, seamlessly integrating with the bike s sleek, rugged aesthetic while ensuring reliable operation. Engineered from durable, corrosion-resistant materials, the S1JUYA switch is constructed with a robust metal housing and high-quality internal components, including a reinforced spring mechanism and a tactile, responsive trigger action that guarantees smooth, consistent engagement with every press. Unlike generic aftermarket alternatives, this switch is meticulously calibrated to match the original Yamaha design, maintaining the same ergonomic feel and operational consistency as the OEM part, while often incorporating subtle refinements for improved durability and longevity. The switch features a **clear, dual-color LED indicator** (red for ignition and green for neutral), providing instant visual feedback to enhance rider confidence and convenience, especially in low-light conditions or during quick starts. Its compact yet sturdy design ensures a secure fit within the handlebar assembly, minimizing the risk of loosening or misalignment over time. Whether you re navigating rugged trails, tackling urban commutes, or simply seeking a reliable upgrade for your Bear Tracker, the BFO S1JUYA Handlebar Start Switch delivers a perfect blend of functionality, performance, and premium craftsmanship, ensuring your Yamaha remains as dependable and responsive as the day it left the factory.

### **Pros and Cons of buying a BFO S1JUYA Handlebar Start Switch for Yamaha YFM-250 Bear Tracker (02-04, Part #4KB-83973-20-00)**

1. **Direct Compatibility** This part is specifically designed for the Yamaha YFM-250 Bear Tracker models from 2002 to 2004, ensuring a proper fit without modifications.

2. **Improved Functionality** The BFO brand is known for producing high-quality aftermarket parts, often offering better durability and smoother operation than OEM components.

3. **Ease of Installation** Since it is a direct replacement, installation should be straightforward for someone with basic mechanical skills, requiring only standard tools.

4. **Reliability** Many users report that aftermarket start switches from reputable brands like BFO last longer than stock units, reducing the risk of failure over time.

5. **Cost-Effective Upgrade** While not necessarily a performance upgrade, replacing a worn-out or malfunctioning switch prevents potential breakdowns, saving money on repairs.

6. **Wide Availability** BFO parts are commonly found on marketplaces like Amazon, eBay, and specialty motorcycle accessory stores, making it easy to purchase.

1. **Potential Quality Variation** While BFO is generally reliable, there is always a chance of receiving a defective unit, especially if purchasing from a third-party seller rather than directly from the manufacturer.

2. **No Significant Performance Gain** Unlike engine upgrades or suspension modifications, a handlebar start switch does not improve the bike s performance it s primarily a functional replacement.

3. **Installation Risk for Beginners** If the buyer lacks mechanical experience, improper wiring or connection could lead to electrical issues or even damage to the bike s system.

4. **Price Premium Over OEM** While often comparable to the cost of a new OEM switch, aftermarket parts may still be slightly more expensive, depending on the seller.

5. **Compatibility Concerns with Mods** If the bike has been heavily modified (e.g., custom wiring harnesses), the new switch may not integrate perfectly, requiring additional adjustments.

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### **Conclusion**

The **BFO S1JUYA handlebar start switch** is a solid choice for Yamaha YFM-250 Bear Tracker owners looking to replace a faulty or worn-out switch. It offers **direct compatibility, reliability, and ease of installation**, making it a practical upgrade for functional improvement rather than performance enhancement. However, buyers should ensure they purchase from a trusted seller to avoid counterfeit or low-quality units. If the bike has extensive modifications, testing the switch after installation is recommended to confirm proper functionality.

### **Recommendation**

If your current start switch is malfunctioning or showing signs of wear, **this BFO part is a worthwhile replacement** due to its reliability and ease of use. For best results:

- Purchase from a reputable seller (e.g., official BFO distributors, well-reviewed online retailers).

- Follow the installation instructions carefully, especially when dealing with wiring.

- If unsure about electrical work, consult a motorcycle mechanic.

For most riders, this is a **low-risk, high-reward upgrade** that prevents potential breakdowns and ensures smooth operation.

Details:

For Yamaha BEAR TRACKER 2WD REALTREE - YFM250XP 2002. Type: Headlight Switch. For Yamaha BEAR TRACKER - YFM25XS 2004. 2.Brand new and High quality replacement.

Fast Shipping. OE/Part number. Package included. Always the correct part.

For Yamaha BEAR TRACKER 2WD REALTREE - YFM250XHP 2002. Quick, Simple. For Yamaha BEAR TRACKER - YFM250XR 2003.guaranteed Fitment.

1.Durable and easy to install. Manufacturer.

specifications electricacompone:

• for models: Yfm250, Bear, Tracker
• for makes: Yamaha
• for years: 2002-2004
• brand: Bfo
• mpn: S1juya
• california prop 65 warning: California Prop 65 Warning
• color: Black
• compatible year: 2004, 2003, 2002
• fitment: For Yamaha Bear Tracker Yfm250x 2002-2004
• function: Switch Start, Switch Engine On Off, Switch Headlight Hi Lo Off
• ipn: 4kb-83973-00-00 4kb-83973-20-00 4kb-83973-21-00
• machine type: Atv
• manufacturer warranty: 2 Years
• material: Plastic, Metal
• placement on vehicle: Left
• type: Headlight Switch
• universal fitment: No

payments electricacompone:

• other
• credit card: Diners-club
• wallet: Apple-pay

general electricacompone:

• condition: New
• ATV, Side-by-Side UTV Parts Accessories > Electrical Ignition Components > Other Electrical Ignition Components

seller electricacompone:

• # reviews: 28721
• city: Houston, Texas
• rating: 99.2%

shipping electricacompone:

• class: Standard
• transit: 4-7 Days
• type: Fixed
• service: Standard
• cost: $0.00

offer electricacompone:

• availability: In Stock
• started: March 13, 2026
• sold: 0
• options: Ship-to-home
• quantity: 10

returns electricacompone:

• paid by: Seller
• time: 30 Days
• policy: Returns Accepted

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