YAMAHA 5FU-20 Cdi Box Big Brain Module

( Manufacturer Part Number: 5FU-20 ), ( Part Type: Box Module ), ( Compatible Model: Big Bear 400 )

Review YAMAHA Big Used Oem Cdi Computer Brain Box Module fits BEAR 400 4WD 2004

Yamaha 5FU-20 Big Bear 400 4WD CDI Brain Box Module

The Yamaha 5FU-20 Big Bear 400 4WD CDI Brain Box Module is a superior electronic control unit (ECU) designed specifically for the Yamaha Big Bear 400 ATV models from 2004. This module, often referred to as the 'Brain Box', serves as the central nervous system for your ATV, optimizing its performance and efficiency.

This Brain Box Module is a CDI (Capacitive Discharge Ignition) unit, ensuring reliable and powerful spark ignition for superior combustion. It's a 4WD (Four-Wheel Drive) module, providing optimal control for all four wheels, enhancing traction and stability on various terrains.

The 5FU-20 Brain Box Module is equipped with advanced engine management capabilities, regulating fuel injection, ignition timing, and other critical engine functions. This results in improved acceleration, smoother power delivery, and reduced emissions.

Installation is straightforward and compatible with stock wiring harnesses, making it an easy upgrade for your ATV. With the Brain Box Module, you can expect a significant enhancement in the overall performance, reliability, and riding experience of your Yamaha Big Bear 400 ATV.

Investing in the Yamaha 5FU-20 Big Bear 400 4WD CDI Brain Box Module is an excellent choice for any ATV enthusiast seeking to boost their vehicle's performance and take their off-road adventures to the next level.

**Item in Question: Yamaha 5FU-20 2004 Big Bear 400 4WD CDI Brain Box Module**

1. Enhanced Performance: The Brain Box Module is designed to improve the performance of your ATV, offering you a smoother and more efficient ride.

2. Diagnostic Capabilities: The module can help diagnose potential issues with your ATV's electrical system, allowing for early problem detection and potential cost savings in the long run.

3. Compatibility: This module is specifically designed for the 2004 Yamaha Big Bear 400, ensuring a perfect fit and optimal performance.

4. Durability: Yamaha is a reputable brand known for producing high-quality products, and this module is no exception. It is built to withstand the rigors of off-road use.

1. Cost: The Brain Box Module may be more expensive compared to some aftermarket performance enhancers.

2. Potential Complication: Any modification to your ATV's electrical system carries a risk of complications, and this module is no exception. It's important to ensure that installation is done correctly to avoid any issues.

3. Limited Warranty: While Yamaha is a reliable brand, the Brain Box Module may not be covered under the same extensive warranty as the ATV itself.

The Yamaha 5FU-20 2004 Big Bear 400 4WD CDI Brain Box Module offers significant performance benefits, but it comes with a higher price tag and potential complications during installation. If you are comfortable with the potential risks and understand the need for professional installation, this module could be a worthwhile investment. However, it's essential to weigh the pros and cons based on your specific needs and budget.

If you are looking to improve the performance of your 2004 Yamaha Big Bear 400 and are comfortable with the potential risks and costs associated with the Brain Box Module, it could be a good choice. However, it's always a good idea to research other options and consider consulting with a professional mechanic before making a purchase.

Details:

This is a 2004 Yamaha Big Bear 400 4WD Used OEM CDI Computer Brain Box Module.it came off ATV that bottom end went bad on. Normal dirt and grind please look at the Pics. Please look at all photos carefully before choosing to buy.

part #: 5fu20 price

• $280.00

specifications electricacompone:

• for models: 400, 4wd, Bear
• for makes: Yamaha
• for years: 2004
• mpn: 5fu-20
• part type: Box Module
• compatible model: Big Bear 400

seller electricacompone:

• city: Springville, Alabama
• rating: 98.4%
• # reviews: 6155

shipping electricacompone:

• transit: 8-15 Days
• class: Standard
• type: Calculated
• carrier: USPS
• service: USPS Ground Advantage
• cost: $0.00

general electricacompone:

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

offer electricacompone:

• started: June 6, 2025
• availability: In Stock
• quantity: 1
• sold: 0
• options: Ship-to-home

payments electricacompone:

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

returns electricacompone:

• policy: No Returns

Yamaha 5FU-20 Is Similar To:

• 01-415 Kimpex Yamaha Cdi Box (27.5% similar) Never taken out of package and used. I box for yamaha vehicles. This item fits the following applications: yamaha VT480GT venture GT1985-1991 SR540 SRV1985-1990 XL540 VLX1985-1989 PZ480 PHAZER1985-1986 EC340 excel III1984-1986 ET340 entice 340...(February 27th, 2018)
• 1-s3-8591-00-00 Yamaha 700 Cdi Box (31.5% similar) Nice off running bike fast shipping...(July 8th, 2017)
• 1008025 Yamaha Rhino 660 Cdi (27.5% similar) Yamaha rhino 660 cdi ecu high performance computer engine control,Lear rev not installed in factory box, tested free shipping within the continental USA...(November 18th, 2017)
• 15-402 Ricks Yamaha Warrior Cdi Box (31.2% similar) ...(October 20th, 2018)
• 18p-81410-00-00 Yamaha Oem Stator Assembly (25.9% similar) Brand new never opened fits YFZ450R fuel injection model's...(December 11th, 2017)
• 18p-81890-00-00 Yamaha Oem Electric Starter Yfz (28.1% similar) We include the oem cross reference in our listings to better insure you get correct part for your unit. Oem yamaha electric starter YFZ450R YFZ450X Fez 18P...(June 10th, 2018)
• 18p-8591a-11-00 Yamaha Oem Ecu Ecm Yfz (25% similar) We include the oem cross reference in our listings to better insure you get correct part for your unit. Oem yamaha ecu ecm YFZ450R YFZ450X Fez...(June 10th, 2018)
• 193753 Kimpex Starter Brush Kit Traxter John Deere Yamaha Big Bear (21.4% similar) Shipping charges listed above apply to the contiguous us. You can also leave us a message. Satisfaction guaranteed before opening a request. Please verify your junk bulk mail folder as our e-mail reply may end up in there. Complex starter brush kit can-am tractor john Deere yamaha big bear Kodiak ...(June 27th, 2018)
• 1b2-h1800-00-00 Yamaha Le Starting Motor Ass New Oem 766856488712 (27.3% similar) New oem yamaha starting motor assume part number: 1B2-H1800 qty 1 item only fits specific model's listed. New oem yamaha starting motor assume part number: 1B2-H1800 qty 1 item only fits specific model's listed. The picture could be generic...(August 3rd, 2018)
• 1c5-82590-00-00 Yamaha Grizzly Oem Main Engine Wiring Harness Motor Wire Loom (27.8% similar) Removed from: 2005 yamaha grizzly 125 YFM125G with miles please review all pictures to assess the condition of item oem main engine wiring harness motor wire loom this is in very good and shows normal signs wear...(March 1st, 2018)
• 1pd-85540-00-00 Yamaha Cdi (20% similar) In good usable condition, comes as pictured...(March 24th, 2019)