1. Electrical Components ATV Parts For Sale
  2. sku: 25302541476173813
  3. YAMAHA 1YW-20

YAMAHA 1YW-20 Cdi Box Big Emc Ingnition Control

fits model: 350, 4x4, Bear. make: Yamaha. year: 1988–1989.

1yw-20 Yamaha 88 89 Big Bear 350 4x4 Oem Cdi Box Emc Computer Ingnition Control

( Manufacturer Part Number: 1YW-20 ), ( Part Type: Control Box ), ( Machine Type: Atv ), ( Color: Black ), ( Compatible Year: 1988, 1989 )

Review YAMAHA Big Oem Cdi Box Emc Computer Ingnition Control fits BEAR 350 4X4 1988–1989

The **Yamaha 1YW-20 89 Big Bear 350 4x4 CDI Box with EMC Ignition Control** is a high-performance, precision-engineered ignition system designed specifically for Yamaha s legendary 350cc Big Bear four-stroke ATV, ensuring optimal power delivery, reliability, and longevity for both off-road enthusiasts and competitive riders. This robust CDI (Capacitor Discharge Ignition) box is engineered to replace the stock ignition system, offering a significant upgrade in spark consistency, voltage stability, and overall engine responsiveness. The EMC (Electronic Motorcycle Control) integration within this unit provides advanced ignition timing adjustments, allowing riders to fine-tune performance for varying conditions whether tackling rough terrain, climbing steep hills, or pushing the limits in competitive racing. Built with durable materials and a rugged housing, the 1YW-20 is resistant to moisture, dust, and vibration, making it ideal for the demanding environments of off-road adventures. Its compact yet robust design ensures easy installation, fitting seamlessly into the Big Bear s existing wiring harness without the need for extensive modifications. Whether you're looking to enhance throttle response, improve fuel efficiency, or simply restore the factory performance of your 350cc ATV, this CDI box delivers a reliable, high-output ignition solution that elevates both power and control. Perfect for both restoration projects and performance upgrades, the Yamaha 1YW-20 is a trusted choice for riders who demand precision, durability, and cutting-edge technology in their off-road machinery.

### Yamaha 1YW-20 89 Big Bear 350 4x4: Pros and Cons

#### **Pros:**

1. **Reliability and Durability** The Yamaha Big Bear 400 series (including the 350) is well-regarded for its robust build quality and long-lasting performance. The 1989 model, while older, was designed with durability in mind, making it a solid choice for off-road use.

2. **Off-Road Capability** As a 4x4 model, it is equipped for rough terrain, including mud, rocks, and trails. The Big Bear was engineered for serious off-roading, making it a capable machine for adventurous riders.

3. **CDI Ignition System** The CDI (Capacitor Discharge Ignition) system improves spark efficiency, leading to better engine performance and smoother starts, especially in cold or wet conditions. This was an upgrade from older ignition systems and contributed to the reliability of the model.

4. **EMC Ignition Control** The EMC (Electronic Motorcycle Control) system helps optimize ignition timing for better fuel efficiency and engine response. This was a relatively advanced feature for its time, enhancing the bike s drivability.

5. **Classic ATV Design** The Big Bear s design is iconic, with a sturdy frame, comfortable seating, and a practical layout. It remains a favorite among collectors and enthusiasts who appreciate its vintage appeal.

6. **Lower Cost of Ownership** Compared to modern ATVs, the 1YW-20 is significantly cheaper to purchase. Maintenance costs are also lower, as parts are widely available and labor is less expensive than for newer models.

7. **Proven Performance** The 350cc engine is known for its torque and low-end power, making it well-suited for hauling trailers, pulling stumps, or tackling steep inclines. It s a workhorse rather than a high-speed machine.

8. **Easy to Modify** The Big Bear s simplicity makes it a popular platform for customization. Owners can easily upgrade components like exhausts, suspension, or engines to improve performance or comfort.

9. **Strong Community Support** There is a dedicated community of Big Bear owners who share knowledge, parts, and modifications. This makes troubleshooting and maintenance easier for those who own one.

10. **Resale Value** While not as high as newer models, well-maintained 1YW-20 Big Bears hold their value reasonably well, especially among collectors.

---

#### **Cons:**

1. **Age and Wear** Being from 1989, the bike may show signs of aging, such as rust, worn-out suspension, or outdated electrical components. Regular maintenance is essential to keep it running smoothly.

2. **Lack of Modern Safety Features** Unlike modern ATVs, the 1YW-20 lacks features like roll cages, advanced braking systems, or electronic stability control. Safety can be a concern, especially for inexperienced riders.

3. **Fuel Efficiency** The 350cc engine is not fuel-efficient by today s standards. It consumes more gas than modern ATVs, which can be costly over time, especially if used frequently.

4. **Limited Availability of Parts** While parts are still available, some components may be harder to find compared to newer models. Custom or aftermarket parts may be required for certain upgrades.

5. **No Automatic Transmission** The Big Bear uses a manual transmission, which can be less convenient for some riders, particularly in stop-and-go situations or when carrying heavy loads.

6. **Weight** The Big Bear is heavier than some modern ATVs, which can make it less maneuverable in tight spaces or on technical trails. However, this weight also contributes to its stability on rough terrain.

7. **Outdated Ergonomics** The seating position and controls may not be as ergonomic as those on newer ATVs, which can lead to discomfort during long rides. Adjustments or modifications may be needed for comfort.

8. **Environmental Regulations** Some areas have emissions regulations that may not align with the older engine technology. The bike may not meet modern environmental standards, limiting where it can be legally ridden.

9. **Higher Maintenance Requirements** Older engines and components require more frequent maintenance, such as oil changes, chain adjustments, and tune-ups, to prevent breakdowns.

10. **Limited Technology** Features like GPS, Bluetooth connectivity, or digital dashboards are absent. Riders who rely on modern tech for navigation or entertainment may find the Big Bear lacking.

---

### **Conclusion:**

The Yamaha 1YW-20 89 Big Bear 350 4x4 is a fantastic choice for riders who prioritize durability, off-road capability, and a classic ATV experience. Its CDI and EMC ignition systems contribute to reliability, and its workhorse nature makes it ideal for heavy-duty tasks like hauling or trail riding. The bike s lower cost of ownership and strong community support are additional advantages.

However, its age means it requires more maintenance, lacks modern safety and convenience features, and may not be as efficient or comfortable as newer models. If you re looking for a reliable, no-frills ATV for off-roading or work, the Big Bear is an excellent investment. But if you need a bike with modern amenities, better fuel efficiency, or advanced safety features, a newer model might be a better fit.

---

### **Recommendation:** Buy the Yamaha 1YW-20 89 Big Bear 350 4x4 if:

- You are an experienced rider who values durability and off-road performance.

- You plan to use it primarily for work, hauling, or serious trail riding.

- You are willing to invest time in maintenance and enjoy the classic ATV experience.

- You find the bike s price and parts availability appealing.

Avoid it if:

- You prioritize modern safety features, fuel efficiency, or comfort.

- You plan to ride it frequently in urban or mixed-terrain environments.

- You lack experience with older ATVs or are unwilling to perform regular maintenance.

- You need advanced technology or connectivity features.

For most buyers, the Big Bear is a **great used purchase** especially if you re prepared to put in the effort to keep it running smoothly. If you re unsure, consider test-riding one to see if it suits your needs before committing.

Details:

No damage to the unit, wiring or connectors. Size / Dimensions: NA. We reuse packing materials when possible. Brand: Yamaha.

Year / Era: 88 89. Condition: Used. Included Items: CDI Unit. Quality Finds Honest Deals Fast Shipping.

Based in the Ozarks Specializing quality pre-owned goods. Model: Big Bear 350. Hull Brothers Trading Company.: Good used cdi.

part #: 1yw20 prices

  • $45.00-$149.98

specifications electricacompone:

  • for models: 350, 4x4, Bear
  • for makes: Yamaha
  • for years: 1988-1989
  • mpn: 1yw-20
  • part type: Control Box
  • machine type: Atv
  • color: Black
  • compatible year: 1988, 1989

general electricacompone:

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

returns electricacompone:

  • policy: No Returns

offer electricacompone:

  • started: May 27, 2026
  • sold: 0
  • quantity: 1
  • availability: In Stock
  • options: Ship-to-home

seller electricacompone:

  • rating: 100.0%
  • city: Marionville, Missouri
  • # reviews: 154

payments electricacompone:

  • other
  • wallet: Paypal
  • credit card: Diners-club

shipping electricacompone:

  • carrier: USPS
  • service: USPS Ground Advantage
  • transit: 3-9 Days
  • type: Calculated
  • class: Standard
  • cost: $0.00
for models: 350, 4x4, bear, for makes: yamaha, for years: 1988-1989, part type: control box, machine type: atv, compatible year: 1988, 1989,
category: atv parts > atv, side-by-side utv parts accessories > electrical ignition components, color: black, sku: 25302541476173813,
Yamaha 1YW-20 Is Similar To:
electricacompone logo
4 offers $45.00–$149.98 USD
  • Used. Offer #1 priced at $45.00 + $0.00 shipping estimate = $45.00* total. Year / Era: 88 89. Model: Big Bear 350.FREE SHIPPING
  • New. Offer #2 priced at $85.00 + $16.50 shipping estimate = $101.50* total. Yamaha ATV 1987 BIG BEAR 4WD - YFM350FWT. NEW CDI for Big Bear and Moto-4 exact plug in part no changes required.+$16.50 shipping
  • Used. Offer #3 priced at $149.98 + $21.73 shipping estimate = $171.71* total. Box18 #915. Fits: 87-88 Yamaha Big Bear YFM350 4x4.+$21.73 shipping
  • Used. Offer #4 priced at $149.98 + $21.73 shipping estimate = $171.71* total. 88-89 Yamaha Big Bear YFM350 FWU/FWT. Fits: 88-89 Yamaha Moto 4 YFM350 ERU.+$21.73 shipping

Copyright © electricacompone.com