1. Motorcycle Cylinder Heads & Valve Covers For Sale
  2. sku: 13975159689313663
  3. BFO X3WS5K

BFO X3WS5K Cylinder Head Kit 70CC ATC70 50CC

fits model: Crf70f, Xr70, Ct70, C70. make: Honda.

X3ws5k Bfo Cylinder Head Complete Kit For Honda 70cc Atc70 Crf70f Xr70 Ct70 C70 / 50cc

( Brand: Bfo ), ( Manufacturer Part Number: X3WS5K ), ( Bundle Listing: Yes ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Compatible Make: For Honda ), ( Compatible Model: Atc70 Crf70 Ct70 C70 Trx70 Xr70 S65 ), ( Engine: 50cc, 70cc ), ( Engine Type: 4-stroke ), ( Exhaust Valve Outside Diameter: 20mm ), ( Fit 1: For Honda 50cc Large Bore ), ( Fit 2: For Honda 70cc Small Bore Cylinder ), ( Fit For: For Domed 50cc Or Flat Top 70cc ), ( 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 Complete Kit Honda 70cc 50cc fits CRF70F XR70 CT70 C70

Introducing the BFO X3WS5K Cylinder Head Kit, an essential upgrade for Honda 70cc ATV models including the ATC70, CRF70F, XR70, CT70, and C70, as well as the 50cc variant. This meticulously engineered cylinder head kit is designed to deliver enhanced power and performance, making it an excellent choice for those seeking to optimize their Honda engine.

The BFO X3WS5K Cylinder Head Kit is characterized by its high-performance design. The cylinder head itself is machined with precision to ensure a perfect fit and optimal combustion chamber shape. The kit includes new, high-performance exhaust valves and seats, which are designed to improve flow and reduce restrictions, resulting in increased power and torque. Furthermore, the kit comes with new, high-performance intake valves and seats, contributing to improved airflow and engine efficiency.

The kit also includes upgraded valve guides and springs, which are engineered to provide better sealing and improved valve control. This results in reduced engine leakage, improved combustion efficiency, and an overall more responsive engine. Additionally, the kit comes with new, high-quality head gaskets, which ensure a perfect seal between the cylinder head and engine block, preventing potential oil or coolant leaks.

Installation of the BFO X3WS5K Cylinder Head Kit is relatively straightforward, and it is designed to be a direct replacement for the original Honda cylinder head. The kit includes all necessary hardware, making it a convenient and hassle-free upgrade for Honda 70cc ATV owners.

In summary, the BFO X3WS5K Cylinder Head Kit is an excellent investment for Honda 70cc ATV owners seeking to improve their engine's power and performance. With its high-performance exhaust and intake valves, upgraded valve guides and springs, and new head gaskets, this kit is designed to deliver results that will leave you with a more responsive and efficient engine.

Buying a BFO X3WS5K cylinder head kit for Honda ATV models like the ATC70, CRF70F, XR70, CT70, and C70 50cc comes with its advantages and disadvantages. Let's take a look at both sides.

Advantages:

1. Performance upgrade: The BFO cylinder head kit is designed to enhance the engine's performance, which can lead to better power output and acceleration.

2. Durability: The kit includes new parts like valves, springs, and guides, which can help improve the engine's longevity and reduce the need for frequent repairs.

3. Customization: Installing a new cylinder head kit provides an opportunity to personalize your ATV and potentially improve its overall appearance.

4. Cost-effective: In the long run, a cylinder head kit may save money by preventing expensive engine rebuilds or replacements.

Disadvantages:

1. Complexity: Installing a cylinder head kit is a complex process that requires advanced mechanical skills and specialized tools. Hiring a professional mechanic or engine builder to do the job can add to the overall cost.

2. Risk: There is always a risk involved when making engine modifications, as it can potentially lead to decreased performance, increased emissions, or engine damage if not installed correctly.

3. Compatibility: Ensuring the cylinder head kit is fully compatible with your specific Honda ATV model is crucial, as using an incorrect kit could lead to various issues.

4. Cost: The initial investment for a BFO X3WS5K cylinder head kit can be substantial, especially when considering the cost of any necessary tools or professional labor.

In conclusion, purchasing a BFO X3WS5K cylinder head kit for your Honda ATV can bring about significant performance improvements and potential cost savings. However, the installation process is complex, and there is a risk involved. It's essential to weigh the advantages and disadvantages carefully and ensure compatibility before making a decision.

Recommendation: If you have the necessary mechanical skills and experience, or if you're willing to pay for professional installation, a BFO X3WS5K cylinder head kit could be a worthwhile investment for your Honda ATV. However, if you're unsure about the installation process or the cost, it might be best to consider other options or consult with a professional mechanic before making a decision.

Details:

G guaranteed Fitment. Quick, Simple. Always the correct part. Cylinder Head Complete Kit for Honda 70cc ATC70 CRF70F XR70 CT70 C70 / 50cc.

This head will only work with DOMED pistons. Fast Shipping. For Honda TRX70. This head will only work with FLAT TOP pistons.

Cylinder Head for Honda CRF70 XR70 CT70 C70 ATC70 TRX70 S65 50cc Large Bore / 70cc Small. Compare the Combustion Chamber Size shown below, to your current head. Manufacturer. For Honda S65.

part #: x3ws5k prices

  • $19.99-$45.60

specifications cylindermotorcycleiz:

  • for models: Crf70f, Xr70, Ct70, C70
  • for makes: Honda
  • brand: Bfo
  • mpn: X3ws5k
  • bundle listing: Yes
  • california prop 65 warning: California Prop 65 Warning
  • compatible make: For Honda
  • compatible model: Atc70 Crf70 Ct70 C70 Trx70 Xr70 S65
  • engine: 50cc, 70cc
  • engine type: 4-stroke
  • exhaust valve outside diameter: 20mm
  • fit 1: For Honda 50cc Large Bore
  • fit 2: For Honda 70cc Small Bore Cylinder
  • fit for: For Domed 50cc Or Flat Top 70cc
  • 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:

  • best offers: True
  • sold: 0
  • options: Ship-to-home
  • availability: In Stock
  • started: March 29, 2026

general cylindermotorcycleiz:

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

shipping cylindermotorcycleiz:

  • cost: $0.00
  • transit: 3-6 Days
  • class: Standard
  • type: Fixed
  • service: FedEx Ground / FedEx Home Delivery
  • carrier: FedEx

payments cylindermotorcycleiz:

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

returns cylindermotorcycleiz:

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

seller cylindermotorcycleiz:

  • rating: 99.0%
  • # reviews: 1307
  • city: Elk Grove Village, Illinois
for models: crf70f, xr70, ct70, c70, for makes: honda, bundle listing: yes, california prop 65 warning: california prop 65 warning, compatible make: for honda, compatible model: atc70 crf70 ct70 c70 trx70 xr70 s65, engine: 50cc, 70cc, engine type: 4-stroke, exhaust valve outside diameter: 20mm, fit 1: for honda 50cc large bore, fit 2: for honda 70cc small bore cylinder, fit for: for domed 50cc or flat top 70cc, 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: 13975159689313663,
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