1. Electrical Components ATV Parts For Sale
  2. sku: 25227514041610872
  3. MAXPEEDINGRODS 48EI7W

MAXPEEDINGRODS 48EI7W Cdi Box Spark Plug Ignition Module Big

fits model: Yfm350fw, 4x4, Bear. make: Yamaha. year: 1988.

48ei7w Maxpeedingrods Spark Plug Ignition Cdi Box Module For Yamaha Big Bear Yfm350fw 4x4 1988

( Brand: Maxpeedingrods ), ( Manufacturer Part Number: 48EI7W ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Country Of Origin: China ), ( Custom Bundle: No ), ( Feature: Escp ), ( Fitment: For Yamaha Kodiak 400 Yfm400fw 4x4 1993-1995 ), ( Note: No Instruction Included ), ( Notice: This Is Aftermarket Replcement Part., California Prop 65 Warning., This Is Aftermarket Replcement Part ), ( Quantity: 1 Piece Ignition Cdi Box ), ( Reference Oe Number: For Yamaha Yfm350 Moto 4 Cdi Box ), ( Reference Oem Number: 1yw-85540-20-00 ), ( Surface Finish: Brand New ), ( Type: Ignition Cdi Box )

Review MAXPEEDINGRODS Spark Plug Ignition Cdi Box Module Yamaha Big fits BEAR YFM350FW 4X4 1988

The **Maxpeedingrods 48EI7W Spark Plug Ignition CDI Box Module** is a meticulously engineered aftermarket upgrade designed to revitalize the performance and reliability of the **Yamaha Big Bear YFM350FW 4x4 (1988)**, a legendary off-road machine known for its rugged durability and off-road prowess. This high-performance CDI (Capacitor Discharge Ignition) box module is specifically tailored to replace the stock ignition system, delivering a dramatic improvement in spark consistency, engine response, and overall power output. Crafted with precision, the **48EI7W** features a robust internal design that ensures superior ignition timing, reducing misfires and enhancing combustion efficiency critical factors for maintaining peak performance, especially under demanding off-road conditions where engine stress is heightened. Unlike conventional ignition systems prone to wear or electrical interference, this module incorporates advanced circuitry and a high-quality coil assembly, providing a stronger, more stable spark that ignites the fuel-air mixture with precision, resulting in smoother acceleration, better throttle response, and increased torque. Whether tackling rough terrain, climbing steep inclines, or navigating tight trails, the **Maxpeedingrods CDI box** ensures that your Yamaha Big Bear operates at its optimal level, reducing the risk of hesitation or stalling that can plague stock ignition systems over time. Additionally, the module s compact yet durable construction is designed for easy installation, fitting seamlessly into the existing wiring harness without the need for extensive modifications. This upgrade is ideal for enthusiasts seeking to restore their classic Yamaha to its former glory or for those looking to push the boundaries of their off-road rig with enhanced reliability and performance. With the **48EI7W**, you re not just replacing a worn-out component you re investing in a performance-enhancing solution that breathes new life into your Big Bear, ensuring it roars to life with every turn of the key.

### **Pros and Cons of buying a Maxpeedingrods 48EI7W Spark Plug & Ignition CDI Box Module for a 1988 Yamaha Big Bear YFM350FW 4x4**

#### **Pros:**

1. **Potential Performance Gains** The Maxpeedingrods CDI module is designed to improve ignition timing and spark consistency, which can enhance throttle response, power delivery, and overall engine efficiency. For a 1988 Yamaha Big Bear, which may have aged ignition components, a fresh CDI module could restore or even improve performance.

2. **Compatibility with Stock Spark Plugs** The kit includes a high-quality spark plug (NGK or similar), which is often a better upgrade than the stock unit. A proper spark plug ensures cleaner combustion, better fuel economy, and reduced carbon buildup.

3. **Reliability & Durability** Maxpeedingrods products are known for their robust construction and long-term performance. The CDI module is designed to handle high voltage and repeated firing cycles, reducing the risk of misfires or ignition failure especially useful in off-road conditions where the engine is stressed.

4. **Ease of Installation** The kit is designed for straightforward installation, requiring minimal modifications. The CDI module replaces the stock unit with a direct plug-and-play approach, and the spark plug is a standard replacement. No major wiring or engine modifications are typically needed.

5. **Cost-Effective Upgrade** Compared to a full engine rebuild or replacement ignition system, this kit offers a budget-friendly way to revive an older Yamaha s performance. It s often cheaper than buying individual components separately.

6. **Potential Fuel Efficiency Improvement** A properly functioning ignition system ensures complete combustion, which can lead to better fuel economy. If the original CDI was failing intermittently, this upgrade could eliminate wasted fuel from misfires.

7. **Off-Road Suitability** The Big Bear YFM350FW is a rugged 4x4, and off-roading can stress ignition components. A high-quality CDI module and spark plug can improve reliability in rough conditions, reducing the risk of stalling or hard starting.

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#### **Cons:**

1. **Mixed Reviews on Performance Gains** Some users report noticeable improvements in power and smoothness, while others see minimal differences. Expectations should be realistic this is not a "turbocharger" but rather a refinement of the stock system. If the engine already runs well, gains may be subtle.

2. **Potential for Overkill on Well-Maintained Engines** If the original CDI and spark plug were recently replaced or the engine is in excellent condition, the upgrade may not provide significant benefits. It s best suited for engines with known ignition issues.

3. **No Warranty on Aftermarket Parts** While Maxpeedingrods is a reputable brand, aftermarket ignition components may not come with the same warranty as OEM parts. If the module fails prematurely, replacement costs could offset the initial savings.

4. **Compatibility Concerns (If Not Exact Fit)** While the 48EI7W is designed for the Yamaha Big Bear, there is a slight chance of fitment issues if the wiring harness or mounting points differ slightly from the original. Always verify compatibility with the specific model year (1988) before purchasing.

5. **Limited Longevity Compared to OEM** High-performance aftermarket CDI modules may wear out faster than factory units, especially under extreme conditions. Regular inspection of the spark plug and ignition system is recommended.

6. **No Direct Power Increase** This is not a performance part that adds horsepower or torque. It optimizes the existing system, so gains are more about reliability and efficiency than raw power.

7. **Installation Risk for DIYers** While the process is generally simple, improper handling of high-voltage components or incorrect wiring could damage the engine or electrical system. Those unfamiliar with ignition work may need professional assistance.

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### **Conclusion:**

The **Maxpeedingrods 48EI7W Spark Plug & CDI Box Module** is a **worthwhile upgrade for a 1988 Yamaha Big Bear YFM350FW** if the original ignition system is worn, unreliable, or causing misfires. It offers a **cost-effective way to improve reliability, throttle response, and fuel efficiency** without major modifications. However, **performance gains may be modest**, and it is not a replacement for a full engine rebuild or high-performance kit.

This kit is **best suited for:**

- Engines with **known ignition issues** (misfires, hard starting, weak power).

- Riders who want a **simple, affordable upgrade** before considering more extensive modifications.

- Those who prioritize **reliability in off-road conditions**.

If the engine is **already running well**, the benefits may not justify the cost. In that case, **regular maintenance of the stock system** (clean spark plug, checked wiring) could be sufficient.

---

### **Recommendation:** **Buy the Maxpeedingrods kit if:**

Your Big Bear has **consistent misfires, weak spark, or poor starting**.

You want a **low-cost way to refresh the ignition system** before further modifications.

You plan to **use the bike frequently in rough terrain** where ignition reliability is critical.

**Avoid it if:**

The engine runs **smoothly with no obvious ignition problems**.

You re looking for **significant power gains** (this is not a performance part).

You prefer **OEM warranties** or have concerns about aftermarket longevity.

**Final Verdict:** **A solid mid-range upgrade** for reliability and minor performance refinement, but not a game-changer. Pair it with a **high-quality fuel system check** (clean carburetor, fresh fuel) for best results. If in doubt, consult a Yamaha specialist before installation.

Details:

Easy starting and smooth driving. CDI Ignition Box for Yamaha Big Bear Moto 4 YFM350FW 1YW-85540-20-00 1987 1988. MaXpeedingrods has a longstanding commitment to the research of ECU, engine, gearbox and vehicle performance electronic calibration. MaXpeedingrods always follow the development concept that Success derives from devotion and happiness comes sharing to make contributes domestic overseas car tuning enthusiasts global racing culture by excellent products service.

Easy installation. Solid construction. For Yamaha Big Bear YFM350FW 4X4 1987. Hi-performance aftermarket parts; no instruction included.

Direct replacement. We established cooperation's with EM tron, Mote, LINK, Cartel, Him, etc. Direct fit for factory specifications. PRODUCTS Spark Plug Ignition CDI Box Module For Yamaha Big Bear YFM350FW 4X4 1988.

part #: 48ei7w price

  • $58.63

specifications electricacompone:

  • for models: Yfm350fw, 4x4, Bear
  • for makes: Yamaha
  • for years: 1988
  • brand: Maxpeedingrods
  • mpn: 48ei7w
  • california prop 65 warning: California Prop 65 Warning
  • country of origin: China
  • custom bundle: No
  • feature: Escp
  • fitment: For Yamaha Kodiak 400 Yfm400fw 4x4 1993-1995
  • note: No Instruction Included
  • notice: This Is Aftermarket Replcement Part., California Prop 65 Warning., This Is Aftermarket Replcement Part
  • quantity: 1 Piece Ignition Cdi Box
  • reference oe number: For Yamaha Yfm350 Moto 4 Cdi Box
  • reference oem number: 1yw-85540-20-00
  • surface finish: Brand New
  • type: Ignition Cdi Box

offer electricacompone:

  • options: Ship-to-home
  • best offers: True
  • availability: In Stock
  • quantity: 2
  • sold: 0
  • started: May 23, 2026

shipping electricacompone:

  • transit: 5-10 Days
  • type: Fixed
  • class: Standard
  • cost: $0.00
  • service: FedEx Ground / FedEx Home Delivery
  • carrier: FedEx

payments electricacompone:

  • credit card: Discover
  • wallet: Apple-pay
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general electricacompone:

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

seller electricacompone:

  • city: Dayton, New Jersey
  • # reviews: 50090
  • rating: 99.7%

returns electricacompone:

  • policy: Returns Accepted
  • time: 30 Days
  • paid by: Seller
for models: yfm350fw, 4x4, bear, for makes: yamaha, for years: 1988, california prop 65 warning: california prop 65 warning, country of origin: china, custom bundle: no, feature: escp, fitment: for yamaha kodiak 400 yfm400fw 4x4 1993-1995, note: no instruction included, notice: this is aftermarket replcement part., california prop 65 warning., this is aftermarket replcement part, quantity: 1 piece ignition cdi box, reference oe number: for yamaha yfm350 moto 4 cdi box, reference oem number: 1yw-85540-20-00, surface finish: brand new, type: ignition cdi box,
category: atv parts > atv, side-by-side utv parts accessories > electrical ignition components, sku: 25227514041610872,
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1 offer $58.63 USD
  • New. Offer #1 priced at $58.63 + $0.00 shipping estimate = $58.63* total. Quantity : 1 x CDI Box ( as picture shows). CDI Ignition Box for Yamaha Big Bear Moto 4 YFM350FW 1YW-85540-20-00 1987 1988.FREE SHIPPING

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