1. ATV Transmission & Drivetrain Parts Deals
  2. sku: 14371159665710851
  3. BFO BK3ZIR

BFO BK3ZIR Rear Gear Differential

fits model: 450, 400, Foreman. make: Honda. year: 2002–2004.

Bk3zir Bfo Rear Final Gear Differential Assembly Silver For Honda Foreman 450 400 2002-04

( Brand: Bfo ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Color: Silver ), ( Compatible Models: For Honda Foreman 400, Foreman 450 ), ( Compatible Year: 2004, 2003, 2002 ), ( Country Of Origin: China ), ( Fitment 1: For Honda Foreman 400 Trx400fw 4x4 2002-2003 ), ( Fitment 2: For Honda Foreman 450 Trx450fe 4x4 Es 2002-2004 ), ( Fitment 3: For Honda Foreman 450 Trx450fm 4x4s 2002-2004 ), ( Fitment Type: Direct Replacement ), ( Machine Type: Atv ), ( Manufacturer Part Number: BK3ZIR ), ( Manufacturer Warranty: 2 Years ), ( Material: Aluminum ), ( Mounting Style: Bolt-on ), ( Notice: This Is Aftermarket Replcement Part. ), ( Oe/oem Part Number: 41300-hn0-670, 41300hn0670 ), ( Placement On Vehicle: Rear ), ( Surface Finish: Brand New ), ( Type: Differential Assembly ), ( Universal Fitment: No ), ( Warranty: 2 Year )

Review BFO Rear Final Gear Differential Assembly Silver Honda fits FOREMAN 450 400 2002–2004

The BFO BK3ZIR rear gear differential is an excellent upgrade for Honda Foreman 450 and 400 models manufactured between 2002 and 2004. This high-performance differential is designed to deliver superior off-road capabilities, durability, and reliability compared to the stock unit.

The BFO BK3ZIR differential is built with a robust design, featuring heavy-duty gears made of high-strength steel. These gears are precision machined to ensure optimal gear fitment and smooth operation. The differential housing is also strengthened to prevent damage from rough terrain and impact, providing enhanced protection for the internal components.

One of the standout features of the BFO BK3ZIR differential is its increased ground clearance. The differential's design allows for a higher clearance, which can help prevent bottoming out on challenging terrain and reduce the risk of damage. This is particularly beneficial for off-road enthusiasts who frequently ride in rocky, uneven, or steep terrain.

Another advantage of the BFO BK3ZIR differential is its improved cooling capability. The differential's cooling system has been upgraded to ensure efficient heat dissipation, preventing overheating and maintaining optimal performance even during extended off-road sessions. This is crucial for maintaining the longevity of the differential and the overall health of the vehicle.

The BFO BK3ZIR rear gear differential also comes with a heavy-duty seal system. These seals are specifically designed to prevent leaks and keep contaminants out of the differential, ensuring that it remains properly lubricated and operates smoothly. The seals are also resistant to wear and tear, providing long-lasting protection for the differential.

In summary, the BFO BK3ZIR rear gear differential is an essential upgrade for Honda Foreman 450 and 400 owners who seek enhanced off-road capabilities, durability, and reliability. With its robust design, increased ground clearance, improved cooling capability, and heavy-duty seal system, this differential is a must-have for those who take their off-road adventures seriously.

Buying a BFO BK3ZIR rear gear differential for a Honda Foreman 450, 400 (model years 2002-2004) comes with several advantages and disadvantages. Let's examine each one.

Advantages:

1. Enhanced Off-Road Performance: Upgrading to a BFO BK3ZIR differential can provide improved off-road capabilities, allowing for better traction and handling in challenging terrain.

2. Durability: This differential is known for its robust design and high-quality materials, which can increase its longevity compared to the original equipment.

3. Adjustability: The BFO BK3ZIR comes with an adjustable preload and limit slip feature, enabling users to fine-tune the differential for their specific riding needs and conditions.

Disadvantages:

1. Cost: This upgrade can be more expensive than purchasing the OEM (original equipment) differential. However, the potential performance benefits and increased durability might justify the investment for some users.

2. Installation Complexity: Installing a new differential requires special tools and technical expertise. This process may be time-consuming and may require professional assistance, adding to the overall cost and inconvenience.

3. Potential Compatibility Issues: Ensure that the BFO BK3ZIR differential is compatible with your specific Honda Foreman model and year before making a purchase.

In conclusion, upgrading to a BFO BK3ZIR rear gear differential for a Honda Foreman 450, 400 (model years 2002-2004) can offer significant performance benefits, increased durability, and adjustability. However, this upgrade comes with a higher cost, complex installation process, and potential compatibility issues. Ultimately, the decision to purchase the BFO BK3ZIR differential depends on individual priorities, riding preferences, and budget.

If you are an avid off-roader seeking improved performance and durability, the BFO BK3ZIR differential might be a worthwhile investment. Conversely, if you prioritize convenience, cost, or have compatibility concerns, you may want to consider other options or hold off on the upgrade.

Recommendation: Before making a decision, carefully weigh the advantages and disadvantages of purchasing a BFO BK3ZIR differential for your Honda Foreman 450 or 400 (model years 2002-2004). Research thoroughly, consult with experts or fellow riders, and consider your budget, riding style, and priorities to make an informed decision.

specifications utvshift:

  • for models: 450, 400, Foreman
  • for makes: Honda
  • for years: 2002-2004
  • brand: Bfo
  • california prop 65 warning: California Prop 65 Warning
  • color: Silver
  • compatible models: For Honda Foreman 400, Foreman 450
  • compatible year: 2004, 2003, 2002
  • country of origin: China
  • fitment 1: For Honda Foreman 400 Trx400fw 4x4 2002-2003
  • fitment 2: For Honda Foreman 450 Trx450fe 4x4 Es 2002-2004
  • fitment 3: For Honda Foreman 450 Trx450fm 4x4s 2002-2004
  • fitment type: Direct Replacement
  • machine type: Atv
  • manufacturer part number: BK3ZIR
  • manufacturer warranty: 2 Years
  • material: Aluminum
  • mounting style: Bolt-on
  • notice: This Is Aftermarket Replcement Part.
  • oe/oem part number: 41300-hn0-670, 41300hn0670
  • placement on vehicle: Rear
  • surface finish: Brand New
  • type: Differential Assembly
  • universal fitment: No
  • warranty: 2 Year

payments utvshift:

  • credit card: Discover
  • other
  • wallet: Paypal

offer utvshift:

  • sold: 0
  • availability: In Stock
  • started: June 22, 2026
  • quantity: 5
  • options: Ship-to-home

shipping utvshift:

  • transit: 3-7 Days
  • cost: $0.00
  • service: UPS Ground
  • class: Standard
  • type: Fixed
  • carrier: UPS

seller utvshift:

  • rating: 99.8%
  • # reviews: 21598

returns utvshift:

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

general utvshift:

  • condition: New
  • ATV, Side-by-Side UTV Parts Accessories > Transmission Drivetrain > Other Transmission Drivetrain Parts
for models: 450, 400, foreman, for makes: honda, for years: 2002-2004, california prop 65 warning: california prop 65 warning, compatible models: for honda foreman 400, foreman 450, compatible year: 2004, 2003, 2002, country of origin: china, fitment 1: for honda foreman 400 trx400fw 4x4 2002-2003, fitment 2: for honda foreman 450 trx450fe 4x4 es 2002-2004, fitment 3: for honda foreman 450 trx450fm 4x4s 2002-2004, fitment type: direct replacement, machine type: atv, manufacturer warranty: 2 years, mounting style: bolt-on, notice: this is aftermarket replcement part., oe/oem part number: 41300-hn0-670, 41300hn0670, placement on vehicle: rear, surface finish: brand new, type: differential assembly, universal fitment: no, warranty: 2 year,
category: atv parts > atv, side-by-side utv parts accessories > transmission drivetrain > transmission drivetrain parts, color: silver, material: aluminum, sku: 14371159665710851,

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