BFO 6UMDF5 Left Handlebar Switch Beartracker 4KB-83973-00-00 4KB-83973-20-00

( Brand: Bfo ), ( Manufacturer Part Number: 6UMDF5 ), ( 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 Left Handlebar Switch Yamaha Beartracker fits YFM25XS 2002–2004

The **BFO 6UMDF5 Left Handlebar Switch** is a meticulously engineered, high-performance replacement part designed specifically for Yamaha s **Beartracker YFM25XS** models from **2002 to 2004**, corresponding to the original equipment part number **4KB-83973-20-00**. Crafted to meet or exceed OEM standards, this switch is a precision-built component that ensures seamless functionality while enhancing the durability and reliability of your motorcycle s electrical system. The switch features a robust, corrosion-resistant construction, utilizing high-grade materials that are resistant to environmental wear, including moisture, dust, and temperature fluctuations, which are common challenges faced by off-road and adventure motorcycles. Its compact yet sturdy design integrates smoothly into the left handlebar cluster, maintaining the original aesthetic and ergonomic feel while delivering flawless operation for critical controls such as the **left turn signal, horn, and auxiliary functions**. The internal wiring is meticulously insulated and secured, minimizing the risk of short circuits or signal interference, which is particularly important for riders who rely on their motorcycle s electrical systems in rugged or remote conditions. Whether you re tackling rough terrain, navigating through dense forests, or cruising on paved roads, this switch ensures consistent performance without compromising on quality. Ideal for both restoration projects and routine maintenance, the BFO 6UMDF5 is a trusted upgrade that restores confidence in your motorcycle s handling and reliability, making it a must-have for any Yamaha owner seeking long-term dependability.

### **Pros and Cons of buying a BFO 6UMDF5 Left Handlebar Switch for Yamaha BearTracker YFM25XS (2002-2004)**

1. **Direct Compatibility** The part number **4KB-83973-20-00** is Yamaha s original designation for the left handlebar switch on the YFM25XS (2002-2004). The BFO 6UMDF5 is a direct replacement, meaning it should fit mechanically without modification.

2. **Reliability** BFO (Bike Factory Outlet) is a reputable aftermarket supplier known for producing high-quality, OEM-compatible parts. Their switches are often built to last, reducing the risk of premature failure.

3. **Cost-Effective Alternative** While not always cheaper than a new OEM part, BFO parts are frequently more affordable than purchasing directly from Yamaha, especially if the original part is no longer available or priced high.

4. **Widespread Availability** BFO parts are widely stocked by motorcycle dealers, online retailers, and specialty shops, making it easier to find and purchase compared to rare OEM components.

5. **Functional Consistency** The switch should operate identically to the original, including the same button feel, click mechanism, and electrical functionality (assuming it s a direct replacement).

6. **Warranty & Support** BFO parts typically come with a warranty (usually 1 year), providing some recourse if the switch fails prematurely.

7. **No Customization Needed** Unlike aftermarket switches designed for performance or aesthetics, this is a straightforward replacement, so no additional wiring or modifications are required.

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1. **Potential Quality Variations** While generally reliable, aftermarket parts can sometimes have slight inconsistencies in build quality compared to OEM components. Some users report minor differences in button feel or durability over time.

2. **Limited Brand Recognition** Unlike Yamaha s brand, BFO is not a household name, which may make some riders hesitant if they prefer OEM parts for peace of mind.

3. **No Original Packaging or Documentation** The part may arrive without the original packaging, manual, or installation instructions, though this is rarely an issue for simple replacements.

4. **Resale Value Impact** If you ever sell the bike, some buyers may prefer original Yamaha parts, potentially affecting resale value slightly. However, this is usually negligible for a part as common as a handlebar switch.

5. **Risk of Counterfeit Parts** Purchasing from untrusted sellers (e.g., unverified online marketplaces) could result in a fake or incompatible switch. Always buy from reputable dealers or authorized BFO distributors.

6. **No Performance Upgrades** Unlike some aftermarket switches designed for better ergonomics or durability, this is a direct replacement with no added benefits beyond functionality.

7. **Potential for Misalignment** If not installed carefully, the switch may not align perfectly with the handlebar or wiring harness, though this is more of an installation issue than a flaw in the part itself.

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The **BFO 6UMDF5 left handlebar switch** is an excellent choice for replacing the faulty or missing switch on your **Yamaha YFM25XS (2002-2004)**. It offers **direct compatibility, reliability, and cost savings** without sacrificing functionality. While there are minor drawbacks (such as potential quality variations or lack of OEM branding), these are outweighed by the part s **proven performance and ease of installation**.

For most riders, this is the **best balance of affordability, availability, and functionality**. If you prefer absolute certainty, an **OEM replacement** (if still available) would be ideal, but it may come at a higher cost. For the average rider, the BFO part is a **safe, practical, and cost-effective solution**.

- **Buy from a trusted source** (e.g., a Yamaha dealer, BFO-authorized distributor, or well-reviewed online retailer) to avoid counterfeit parts.

- **Test the switch** after installation to ensure proper functionality (e.g., turn signals, horn, and ignition).

- **Consider keeping a spare** if you frequently replace parts, as handlebar switches can wear out over time.

- **If available**, an **OEM part (4KB-83973-20-00)** may be preferable for long-term reliability, but the BFO switch is a **highly viable alternative**.

**Final Verdict:** **Purchase the BFO 6UMDF5** it s a **reliable, cost-effective, and easy-to-install** replacement for your Yamaha YFM25XS.

Details:

Quick, Simple. OE/Part number. 2.Brand new and High quality replacement. Type: Headlight Switch.

Package included. Left Handlebar Switch for Yamaha BEARTRACKER YFM25XS 2002 - 2004 4KB-83973-20-00. For Yamaha BEAR TRACKER 2WD REALTREE - YFM250XHP 2002. For Yamaha BEAR TRACKER 2WD REALTREE - YFM250XP 2002.

For Yamaha BEAR TRACKER - YFM250XR 2003. Manufacturer. Fast Shipping.guaranteed Fitment.

1.Durable and easy to install. Always the correct part.

specifications electricacompone:

• for models: Yfm25xs
• for makes: Yamaha
• for years: 2002-2004
• brand: Bfo
• mpn: 6umdf5
• 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

shipping electricacompone:

• cost: $0.00
• type: Fixed
• service: Standard
• transit: 4-8 Days
• class: Standard

seller electricacompone:

• rating: 98.9%
• city: Houston, Texas
• # reviews: 719

payments electricacompone:

• wallet: Paypal
• credit card: Discover
• other

returns electricacompone:

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

general electricacompone:

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

offer electricacompone:

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

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