BFO F1IS7L Starter Motor Relay 5UG-81940-00-00

( Brand: Bfo ), ( Manufacturer Part Number: F1IS7L ), ( Part Type: Starter Motor ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Machine Type: Atv ), ( Manufacturer Warranty: 2 Years ), ( Oe/oem Part Number: 1d0-81940-01-00, 1d0-81940-02-00, 4bh-81940-00-00, 4bh-81940-01-00, 4xe-81940-00-00, 4xe-81940-10-00, 4xe-81940-12-00, 5ug-81940-00-00 ), ( Universal Fitment: No )

Review BFO Starter Motor Relay Yamaha fits RHINO YXR450F 450 2006–2009

The **BF0 F1IS7L Starter Motor Relay** is a high-performance, direct-fit replacement designed specifically for Yamaha Rhino 450 (YXR450F) models manufactured between 2006 and 2009, corresponding to the original equipment part number **5UG-81940-00-00**. Engineered to meet or exceed OEM specifications, this relay is crafted from premium-grade materials to ensure durability, reliability, and seamless electrical performance under demanding conditions. Built with a robust, corrosion-resistant housing, the relay is engineered to withstand the harsh environments often encountered in off-road and utility applications, where moisture, dust, and extreme temperatures can compromise standard components. Its compact yet sturdy design allows for an easy, tool-free installation, eliminating the need for complex wiring adjustments or modifications, making it an ideal choice for both professional mechanics and DIY enthusiasts. The relay features a high-current capacity, ensuring a strong and consistent electrical connection to the starter motor, which is critical for reliable engine cranking especially in cold starts or when the battery is under stress. With a focus on compatibility and longevity, this replacement relay eliminates common issues such as intermittent electrical failures, weak starter engagement, or premature wear on related components, thereby extending the overall lifespan of your Yamaha Rhino s electrical system. Whether you re restoring an older model or upgrading a well-used machine, the BF0 F1IS7L Starter Motor Relay provides a dependable solution that restores factory-level performance with minimal effort.

### **Pros and Cons of buying a BFO F1IS7L Starter Motor Relay for Yamaha Rhino 450 YXR450F (2006 2009, Part #5UG-81940-00-00)**

1. **Compatibility** The BFO F1IS7L is designed as a direct replacement for the OEM Yamaha starter motor relay (part #5UG-81940-00-00), ensuring a proper fit and function without modifications.

2. **Reliability** BFO is a reputable brand known for producing high-quality aftermarket electrical components, reducing the risk of premature failure compared to generic or low-quality alternatives.

3. **Cost-Effective** Purchasing this relay is significantly cheaper than buying an OEM replacement from Yamaha, offering substantial savings without sacrificing performance.

4. **Easy Installation** The relay is designed for straightforward installation, requiring minimal tools and technical skill. Most users can replace it in under an hour with basic wiring knowledge.

5. **Durability** The relay is built to withstand repeated engagement cycles, reducing the likelihood of wear-related failures that can occur with older or lower-quality parts.

6. **Warranty Support** BFO products often come with a warranty (typically 1 2 years), providing peace of mind against manufacturing defects.

7. **Preventative Maintenance** Replacing an aging or failing relay proactively can prevent starter motor damage, which is far more expensive to repair than a simple relay replacement.

1. **Potential Counterfeit Risk** Some third-party sellers may offer fake or low-quality BFO relays, especially on unregulated marketplaces. Purchasing from authorized dealers or reputable retailers (e.g., Amazon, RockAuto, or Yamaha-approved suppliers) mitigates this risk.

2. **Limited Brand Recognition** While BFO is reliable, it is not an OEM brand, so some users may hesitate due to unfamiliarity. However, this is outweighed by the cost savings and availability.

3. **Wiring Compatibility Concerns** In rare cases, wiring pin configurations or voltage requirements might differ slightly from the OEM part, though this is uncommon for well-designed aftermarket relays like the BFO F1IS7L.

4. **No Long-Term Data** Since it s an aftermarket part, long-term field performance data may not be as extensive as OEM components, though BFO s reputation suggests it holds up well.

5. **Installation Mistakes** If not installed correctly (e.g., reversed wiring, improper grounding), the relay could fail or damage the starter motor. Careful attention to wiring diagrams is essential.

---

### **Conclusion**

The **BFO F1IS7L starter motor relay** is a **strong, cost-effective alternative** to the OEM Yamaha part for the 2006 2009 YXR450F. It offers **reliability, ease of installation, and significant savings** while maintaining compatibility. The primary risks counterfeit products and installation errors can be easily avoided by purchasing from trusted sources and following proper installation steps. For most users, this relay provides a **practical and efficient solution** for replacing a faulty starter relay without compromising performance.

### **Recommendation**

- **Buy from an authorized seller** (e.g., RockAuto, Amazon, or a Yamaha-approved parts dealer) to ensure authenticity.

- **Verify wiring connections** before installation to avoid polarity errors.

- **Test the relay** after installation by attempting to start the engine if it fails, double-check connections and consult a mechanic if needed.

- **Consider purchasing a starter motor test light or multimeter** to confirm proper relay operation post-installation.

**Final Verdict:** The BFO F1IS7L is a **highly recommended replacement** for the Yamaha starter relay, offering a **balance of quality, affordability, and ease of use**. For most riders, it is the **best aftermarket option** available.

Details:

If you paid Before Apr. Guaranteed Fitment. Condition: New. Make: for Yamaha.

. Always the correct part. Package included. Manufacturer.

Placement on Vehicle: Front. Type Starter Motor Relay. Quick, Simple. OE/Part number.

For Bear Tracker 250 YFM250X 1999 - 2004. For Raptor 350 YFM350R 2004 -2013. For Raptor 350 YFM350SE Special Edition 2005 -2007. Free Shipping.

Starter Motor Relay for Yamaha Rhino 450 YXR450F 2006 2009 5UG-81940-00-00 Most.

specifications electricacompone:

• for models: Yxr450f, 450, Rhino
• for makes: Yamaha
• for years: 2006-2009
• brand: Bfo
• mpn: F1is7l
• part type: Starter Motor
• california prop 65 warning: California Prop 65 Warning
• machine type: Atv
• manufacturer warranty: 2 Years
• oe/oem part number: 1d0-81940-01-00, 1d0-81940-02-00, 4bh-81940-00-00, 4bh-81940-01-00, 4xe-81940-00-00, 4xe-81940-10-00, 4xe-81940-12-00, 5ug-81940-00-00
• universal fitment: No

general electricacompone:

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

payments electricacompone:

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

returns electricacompone:

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

shipping electricacompone:

• transit: 2-4 Days
• cost: $0.00
• service: Standard
• type: Fixed
• class: Standard

offer electricacompone:

• options: Ship-to-home
• sold: 0
• started: April 6, 2026
• availability: In Stock

seller electricacompone:

• city: Elk Grove Village, Illinois
• rating: 99.6%
• # reviews: 3062

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