1. Motorcycle Cylinder Heads & Valve Covers For Sale
  2. sku: 14425698810179751
  3. BFO 6BJNM0

BFO 6BJNM0 Cylinder Head Inner 47MM 39MM

fits model: Crf70f. make: Honda. year: 2011–2012.

6bjnm0 Bfo Cylinder Head For Honda Crf70f 2004-2009 2011-2012 47mm Inner Bore 39mm

( Brand: Bfo ), ( Manufacturer Part Number: 6BJNM0 ), ( Bundle Listing: Yes ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Country Of Origin: China ), ( Engine Type: 4-stroke ), ( Exhaust Valve Outside Diameter: 20mm ), ( Fit 1: For Honda Atc70 Ct70 Trx70 Crf70 Xr70 70cc 72cm3 ), ( Including: Cylinder Head ), ( Inner Bore Size: 39mm ), ( Intake Valve Outside Diameter: 23mm ), ( Items Included: Gasket ), ( Length: 66mm ), ( Machine Type: Off-road Motorcycle, Street Motorcycle ), ( Note: No Instruction Included ), ( Notice: This Is Aftermarket Replcement Part. ), ( Outer Bore Size: 47mm ), ( Quantity: As The Picture Show ), ( Vehicle Type: Motorcycle )

Review BFO Cylinder Head Honda 2004 2009 47mm Inner Bore 39mm fits CRF70F 2011–2012

Introducing the BFO 6BJNM0 Cylinder Head, specifically designed for Honda CRF70F models produced between 2004 and 2009, as well as the 2011 and 2012 versions. This high-performance cylinder head boasts a 47mm inner diameter and a 39mm exhaust port, making it an excellent upgrade for those seeking improved engine power and efficiency.

The BFO 6BJNM0 Cylinder Head is meticulously crafted using advanced manufacturing techniques and premium materials. Each component undergoes rigorous testing to ensure optimal engine performance and longevity. The cylinder head features a high-strength aluminum alloy construction, enabling it to withstand the demanding conditions of off-road riding.

One of the most notable improvements of this cylinder head is its increased flow rate, thanks to its enlarged intake and exhaust ports. This enhancement results in a more efficient combustion process, leading to increased horsepower and torque. Furthermore, the larger ports contribute to a smoother engine response, allowing for better throttle control and a more responsive riding experience.

Moreover, the BFO 6BJNM0 Cylinder Head comes with optimized combustion chamber geometry. Its design allows for a more efficient fuel-air mixture, resulting in better combustion efficiency, reduced fuel consumption, and lower emissions. Additionally, the new combustion chamber design helps to reduce engine heat, keeping overall operating temperatures lower and contributing to improved engine durability.

Installing the BFO 6BJNM0 Cylinder Head is a straightforward process that can be accomplished with basic hand tools. This upgrade not only offers performance benefits but also enhances the visual appeal of your Honda CRF70F, making it a popular choice among off-road enthusiasts and racers.

In summary, the BFO 6BJNM0 Cylinder Head is an excellent upgrade for Honda CRF70F owners looking to enhance their engine's power and efficiency. With its increased flow rate, optimized combustion chamber design, and durable construction, this cylinder head delivers noticeable performance improvements and long-lasting reliability.

Buying a BFO 6BJNM0 cylinder head for a Honda CRF70F (2004-2009, 2011-2012) with a 47mm inner and 39mm diameter can be a consideration for those looking to improve the performance of their ATV (All-Terrain Vehicle). Here are some potential pros and cons based on general information and customer feedback.

Pros:

1. Enhanced Power: A new cylinder head can lead to increased horsepower and torque, resulting in better overall performance.

2. Improved Throttle Response: A high-performance cylinder head can provide smoother power delivery and quicker throttle response.

3. Durability: A high-quality cylinder head can withstand rough riding conditions and last longer than a stock head.

Cons:

1. Cost: A new cylinder head can be quite expensive, especially when compared to the cost of a stock head or other aftermarket parts.

2. Installation Complexity: Installing a new cylinder head can be a challenging process, requiring specialized tools and technical expertise.

3. Potential for Engine Damage: Installing an incorrect or poorly made cylinder head can lead to engine damage and expensive repairs.

Ending Conclusion:

The decision to buy a BFO 6BJNM0 cylinder head for a Honda CRF70F (2004-2009, 2011-2012) with a 47mm inner and 39mm diameter depends on various factors, including your budget, technical expertise, and riding goals. If you're looking for significant performance gains and are willing to invest in a high-quality, aftermarket part, then a new cylinder head might be worth considering. However, if you're on a tight budget or are not comfortable with the installation process, then it might be more practical to consider other aftermarket parts or even stock upgrades.

Recommendation:

If you do decide to pursue a new cylinder head for your Honda CRF70F, make sure to purchase from a reputable aftermarket manufacturer and consult with a professional mechanic or experienced ATV enthusiast to ensure a successful installation. This will help minimize the potential risks and maximize the benefits of this performance upgrade.

Details:

G guaranteed Fitment. Fast Shipping. 7th, After Apr. Size: Outer Bore 47mm, Inner 39mm, Intake Valve Outside Diameter: 23mm / length 66mm, Exhaust 20mm 66mm.

Always the correct part. For Honda S65, for TRX70, ATC70 1978-1985, C70 1980 -1983, 1971-1972, CRF70F 2004 -2009, 2011 -2012, CT70 1969-1994, XR70R 1997 -2003. Manufacturer. Quick, Simple.

Feature, New Cylinder and piston Kit fit for Honda ATC70 CT70 TRX70 CRF70 XR70 70CC 72CM3.

specifications cylindermotorcycleiz:

  • for models: Crf70f
  • for makes: Honda
  • for years: 2011-2012
  • brand: Bfo
  • mpn: 6bjnm0
  • bundle listing: Yes
  • california prop 65 warning: California Prop 65 Warning
  • country of origin: China
  • engine type: 4-stroke
  • exhaust valve outside diameter: 20mm
  • fit 1: For Honda Atc70 Ct70 Trx70 Crf70 Xr70 70cc 72cm3
  • including: Cylinder Head
  • inner bore size: 39mm
  • intake valve outside diameter: 23mm
  • items included: Gasket
  • length: 66mm
  • machine type: Off-road Motorcycle, Street Motorcycle
  • note: No Instruction Included
  • notice: This Is Aftermarket Replcement Part.
  • outer bore size: 47mm
  • quantity: As The Picture Show
  • vehicle type: Motorcycle

general cylindermotorcycleiz:

  • Motorcycle Scooter Parts Accessories > Engines Engine Parts > Cylinder Heads
  • condition: New

returns cylindermotorcycleiz:

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

offer cylindermotorcycleiz:

  • started: June 4, 2026
  • availability: In Stock
  • best offers: True
  • options: Ship-to-home
  • sold: 0

seller cylindermotorcycleiz:

  • city: Elk Grove Village, Illinois
  • rating: 99.7%
  • # reviews: 42414

shipping cylindermotorcycleiz:

  • service: FedEx Ground / FedEx Home Delivery
  • type: Fixed
  • class: Standard
  • carrier: FedEx
  • transit: 4-7 Days
  • cost: $0.00

payments cylindermotorcycleiz:

  • wallet: Google-pay
  • credit card: Visa
  • other
for models: crf70f, for makes: honda, for years: 2011-2012, bundle listing: yes, california prop 65 warning: california prop 65 warning, country of origin: china, engine type: 4-stroke, exhaust valve outside diameter: 20mm, fit 1: for honda atc70 ct70 trx70 crf70 xr70 70cc 72cm3, including: cylinder head, inner bore size: 39mm, intake valve outside diameter: 23mm, items included: gasket, length: 66mm, machine type: off-road motorcycle, street motorcycle, note: no instruction included, notice: this is aftermarket replcement part., outer bore size: 47mm, quantity: as the picture show, vehicle type: motorcycle,
category: motorcycle parts > motorcycle scooter parts accessories > engines engine parts > cylinder heads, sku: 14425698810179751,
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