BRONCO MN-4S4K Ignition Coil Electrical MN/4S4K

( Brand: Bronco ), ( Manufacturer Part Number: MN/4S4K ), ( Compatible Year: 2008 2007 2006 2005 ), ( Compatible Model: Yfm80 Grizzly ), ( Bundle Description: 1 Pc Genuine Bronco Ignition Coils ), ( Type: Ignition Coils ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement )

Review BRONCO Mn/4s4k Ignition Coil Yamaha Electrical fits GRIZZLY YFM80 XJ 2005–2008

The **2005-2008 Yamaha YFM80 Grizzly Electrical XJ Ignition Coil (MN/4S4K)** is a precision-engineered component designed to deliver reliable, high-performance spark generation for this rugged off-road utility vehicle. Built to meet Yamaha s strict engineering standards, this coil is specifically tailored to the YFM80 s **MN/4S4K engine configuration**, ensuring seamless integration with the electrical system and ignition timing for optimal combustion efficiency. Constructed from high-grade materials, including a robust coil core and insulated windings, it is engineered to withstand the demanding conditions of off-road use, from dusty trails to extreme temperatures. The coil features a **high-energy output** to guarantee consistent ignition even under heavy loads, preventing misfires and maintaining peak engine performance. Its **durable construction** includes corrosion-resistant coatings and reinforced wiring to protect against moisture, vibration, and electrical interference, which are common challenges in off-road environments. Whether you're tackling rough terrain or relying on the Grizzly for utility work, this coil ensures a **strong, reliable spark** every time, contributing to smoother operation, better fuel economy, and extended engine longevity. Perfect for both original equipment replacement and aftermarket upgrades, it s a critical component for maintaining the reliability and power of your Yamaha YFM80.

### Pros and Cons of Buying a Replacement Ignition Coil for a 2005 2008 Yamaha YFM80 Grizzly (Electrical XJ)

1. **Reliability and Performance** A faulty ignition coil can cause misfires, rough idling, or failure to start. Replacing it with a high-quality, OEM or aftermarket coil ensures consistent spark delivery, improving engine performance and fuel efficiency. A properly functioning coil reduces wear on other engine components like spark plugs, plugs wires, and the distributor (if applicable).

2. **Prevents Further Damage** Ignoring a failing coil can lead to more severe issues, such as catalytic converter damage (due to unburned fuel) or engine knocking. Replacing it early avoids costly repairs down the line.

3. **Ease of Installation** The ignition coil on the Yamaha YFM80 is relatively straightforward to replace. It typically requires removing the air filter housing, disconnecting wiring, and swapping the coil no major modifications or tools beyond basic socket wrenches are needed.

4. **Cost-Effective Fix** Replacement coils are inexpensive compared to the potential damage a failing coil could cause. A new coil costs around $20 $60, depending on quality, while repair costs for misfire-related damage (e.g., catalytic converter replacement) can exceed $1,000.

5. **Compatibility with Aftermarket Upgrades** If you plan to modify the engine (e.g., installing a bigger carburetor or performance air filter), a high-quality coil ensures compatibility and reliability with these changes.

6. **Extended Engine Life** A well-functioning ignition system reduces stress on the engine, potentially extending its lifespan by preventing misfires and incomplete combustion.

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1. **Potential for Counterfeit or Low-Quality Parts** Cheap or non-OEM coils may fail prematurely or cause intermittent issues. Buying from untrusted sellers increases the risk of receiving a subpar or incompatible part.

2. **Misdiagnosis of Symptoms** If the coil isn t the actual issue (e.g., faulty spark plugs, wiring problems, or a failing distributor), replacing it without proper diagnostics may not resolve the problem. Always verify the coil s condition with a multimeter or by comparing it to a known-good coil.

3. **Time-Consuming Installation (If DIY)** While simple, removing the air filter housing and coil requires some disassembly. If you re unfamiliar with small-engine repairs, it may take longer than expected, especially in tight spaces.

4. **Limited Lifespan of Aftermarket Coils** Some aftermarket coils may not last as long as OEM parts. High-quality brands (e.g., NGK, Denso, or Yamaha genuine) are more reliable but may cost slightly more.

5. **Distributor-Related Issues (If Applicable)** If your Yamaha uses a distributor (common in older models), a failing distributor cap or rotor can also cause misfires. Replacing just the coil without addressing these could lead to recurring problems.

6. **Environmental Factors** Exposure to moisture, dirt, or extreme temperatures can degrade coil performance over time. Ensuring the coil is properly sealed and protected during installation helps mitigate this.

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Replacing the ignition coil on your 2005 2008 Yamaha YFM80 Grizzly is a **highly recommended and cost-effective solution** if you re experiencing misfires, poor starting, or rough running. The benefits improved reliability, better performance, and prevention of further damage far outweigh the minor drawbacks, provided you source a **high-quality, compatible coil** and ensure the rest of the ignition system (spark plugs, wires, distributor) is in good condition.

If you re unsure whether the coil is the culprit, **diagnose the issue first** using a spark test or multimeter reading. If the coil is confirmed faulty, proceed with replacement. For long-term reliability, opt for an **OEM or reputable aftermarket brand** (e.g., NGK, Denso, or Yamaha s genuine part) rather than the cheapest option available.

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1. **Verify the coil is the problem** before replacing it. Use a spark test or check for resistance (typically 5 10 ohms for the primary coil and 5 10 k for the secondary).

2. **Purchase a high-quality replacement coil** either the **Yamaha OEM part (e.g., 3TW-10000-00)** or a trusted aftermarket brand like **NGK (IKR6A-11)** or **Denso (4544)**.

3. **Follow proper installation steps** clean the mounting area, ensure wiring is secure, and avoid overtightening the coil.

4. **Replace spark plugs and wires if needed** a failing coil often correlates with worn plugs or damaged wires.

5. **Consider a distributor check** if your model uses one, as a bad cap or rotor can mimic coil failure.

**Overall, replacing the ignition coil is a smart, low-risk fix** that will likely resolve your engine issues and save you from more expensive repairs later.

Details:

Bronco Ignition Coil for 2005 - 2008 Yamaha YFM80 Grizzly - Electrical Xj: Status: In Stock.

part #: mn4s4k price

• $29.25

specifications electricacompone:

• for models: Yfm80, Xj, Grizzly
• for makes: Yamaha
• for years: 2005-2008
• brand: Bronco
• mpn: Mn/4s4k
• compatible year: 2008 2007 2006 2005
• compatible model: Yfm80 Grizzly
• bundle description: 1 Pc Genuine Bronco Ignition Coils
• type: Ignition Coils
• core charge: Free No Core Charge
• fitment type: Direct Replacement

returns electricacompone:

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

payments electricacompone:

• other
• wallet: Paypal
• credit card: Discover

offer electricacompone:

• sold: 0
• started: May 23, 2026
• availability: In Stock
• quantity: 1
• options: Ship-to-home

seller electricacompone:

• city: Multiple warehouses
• rating: 99.2%
• # reviews: 23170

general electricacompone:

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

shipping electricacompone:

• cost: $0.00
• type: Fixed
• service: Standard
• class: Standard
• transit: 5-11 Days

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