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  3. BFO WKOYM5

BFO WKOYM5 Cylinder Head Rebuild Inner 47MM 39MM

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

Wkoym5 Bfo Cylinder Head Rebuild For Honda Crf70f 2004-09 2011-2012 47mm Inner Bore 39mm

( Brand: Bfo ), ( Manufacturer Part Number: WKOYM5 ), ( 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 Rebuild Honda 2004 09 47mm Inner Bore 39mm fits CRF70F 2011–2012

BFO WKOYM5 Cylinder Head Rebuild Kit for Honda CRF70F (2004-2009 & 2011-2012) 47mm Inner, 39mm External

Introducing the BFO WKOYM5 Cylinder Head Rebuild Kit, meticulously designed for Honda CRF70F models produced between 2004 and 2009, and the extended variant from 2011 to 2012. This comprehensive rebuild kit is specifically engineered for the 47mm inner and 39mm external cylinder head.

The BFO WKOYM5 Cylinder Head Rebuild Kit is a must-have for those who want to breathe new life into their Honda CRF70F's engine. This high-quality kit includes all the essential components needed to restore the cylinder head to its optimal performance.

The kit includes:

1. New OEM-style valves: These premium valves are designed to provide improved engine efficiency and reliability. They are carefully manufactured to meet Honda's stringent specifications, ensuring a perfect fit and seamless operation.

2. Valve springs: The kit includes new valve springs that are specifically engineered to work in harmony with the new valves. These springs deliver consistent valve action for optimal engine performance and longevity.

3. Valve guides: The BFO WKOYM5 Cylinder Head Rebuild Kit includes new, precision-machined valve guides. These guides ensure a perfect seal between the valve stems and the cylinder head, reducing leakage and ensuring smooth engine operation.

4. New valve retainers: The kit includes new, robust valve retainers that securely hold the valves in place. These retainers are designed to provide superior durability and reliability, ensuring that the valves remain properly seated during engine operation.

5. New valve stem seals: The BFO WKOYM5 Cylinder Head Rebuild Kit includes new valve stem seals. These seals form a tight seal between the valve stems and the cylinder head, reducing leakage and ensuring optimal engine performance.

6. New cylinder head gasket: A high-quality, new cylinder head gasket is included in the kit. This gasket ensures a perfect seal between the cylinder head and the engine block, preventing coolant and oil leakage and ensuring optimal engine performance.

7. New head bolts: The kit includes new, high-strength head bolts that securely hold the cylinder head in place. These bolts are designed to provide superior tensile strength and ensure a precise fit, ensuring optimal engine performance and longevity.

In summary, the BFO WKOYM5 Cylinder Head Rebuild Kit for Honda CRF70F (2004-2009 & 2011-2012) is a premium, comprehensive rebuild solution that includes all the essential components needed to restore the cylinder head to its optimal performance. With this kit, you can enjoy improved engine efficiency, reliability, and longevity, making it an essential investment for any Honda CRF70F owner.

Buying a BFO WKOYM5 cylinder head rebuild for a Honda CRF70F with a 47mm inner and 39mm size between 2004-2009 and 2011-2012 involves several considerations, each with its pros and cons.

Pros of buying a BFO WKOYM5 cylinder head rebuild:

1. Cost-effective: A rebuild kit is generally less expensive than buying a new cylinder head. This makes it an attractive option for those on a budget.

2. OEM-quality parts: BFO is a reputable aftermarket manufacturer known for producing high-quality, OEM-standard parts. This ensures that the rebuild kit contains reliable and durable components.

3. Improved engine performance: A rebuilt cylinder head can lead to improved engine performance, as any worn or damaged components are replaced with new ones.

4. Environmentally friendly: Rebuilding an existing cylinder head instead of buying a new one reduces the amount of waste generated, making it a more environmentally friendly option.

Cons of buying a BFO WKOYM5 cylinder head rebuild:

1. Time-consuming: Rebuilding a cylinder head requires a significant investment of time and labor. Depending on your mechanical abilities and the resources available to you, this could be a drawback.

2. Requires specialized tools: To rebuild a cylinder head, you will need access to specialized tools and equipment. This may require an additional investment or the hiring of a professional mechanic.

3. Risk of damage during installation: There is a risk of damaging other engine components during the cylinder head installation process. This could result in additional repair costs.

4. Potential for compatibility issues: Although BFO is a reputable manufacturer, there is still a potential for compatibility issues with specific engine models. It is essential to verify that the rebuild kit is compatible with your CRF70F before making a purchase.

In conclusion, buying a BFO WKOYM5 cylinder head rebuild for a Honda CRF70F can offer cost savings, OEM-quality parts, and improved engine performance. However, it also involves a significant time investment, the need for specialized tools, the risk of damage during installation, and potential compatibility issues.

Recommendation:

If you have the necessary mechanical skills, tools, and time to rebuild the cylinder head yourself, and you are confident in the compatibility of the kit with your CRF70F, then a BFO WKOYM5 cylinder head rebuild can be a cost-effective and high-quality solution. Alternatively, if you prefer a quicker and less labor-intensive option, consider purchasing a rebuilt or remanufactured cylinder head from a trusted specialist or Honda dealership.

Details:

Cylinder Head Rebuild for Honda CRF70F 2004 09 2011 2012 47mm Inner Bore 39mm. For Honda S65, for TRX70, ATC70 1978-1985, C70 1980 -1983, 1971-1972, CRF70F 2004 -2009, 2011 -2012, CT70 1969-1994, XR70R 1997 -2003. Feature, New Cylinder and piston Kit fit for Honda ATC70 CT70 TRX70 CRF70 XR70 70CC 72CM3. Guaranteed Fitment Always the correct part.

Shipping Warranty FAQ. Fast Shipping. Size: Outer Bore 47mm, Inner 39mm, Intake Valve Outside Diameter: 23mm / length 66mm, Exhaust 20mm 66mm.

specifications cylindermotorcycleiz:

  • for models: Crf70f
  • for makes: Honda
  • for years: 2011-2012
  • brand: Bfo
  • mpn: Wkoym5
  • 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

offer cylindermotorcycleiz:

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

shipping cylindermotorcycleiz:

  • carrier: FedEx
  • cost: $0.00
  • type: Fixed
  • service: FedEx Ground / FedEx Home Delivery
  • transit: 2-6 Days
  • class: Standard

general cylindermotorcycleiz:

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

returns cylindermotorcycleiz:

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

payments cylindermotorcycleiz:

  • other
  • wallet: Paypal
  • credit card: Discover

seller cylindermotorcycleiz:

  • city: Elk Grove Village, Illinois
  • rating: 99.3%
  • # reviews: 1599
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: 14414743809020893,
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