BFO UL6YNM Cylinder Head 70CC ATC70 72CM3

( Brand: Bfo ), ( Manufacturer Part Number: UL6YNM ), ( Bundle Listing: Yes ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Compatible Make: For Honda ), ( Compatible Model: Atc70 Crf70 Ct70 C70 Trx70 Xr70 S65 ), ( Country Of Origin: China ), ( 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: Instruction Included ), ( Notice: This Is Aftermarket Replcement Part. ), ( Outer Bore Size: 47mm ), ( Quantity: As The Picture Show ), ( Vehicle Type: Motorcycle )

Review BFO 70cc Cylinder Head Assembly Honda fits CT70 TRX70 CRF70 XR70

The BFO Ul6ynm 70cc Cylinder Head is an excellent upgrade for Honda ATV models, including the ATC70, CT70, TRX70, CRF70, and XR70 with a 72cm3 engine. This cylinder head is meticulously crafted to deliver superior performance and reliability, making it an ideal replacement or enhancement for your Honda ATV.

The Ul6ynm cylinder head boasts a larger displacement of 70cc compared to the standard 66.4cc cylinder head, providing your ATV with an increased power output and improved torque. The oversized cylinder bore and piston help to maximize combustion efficiency, ensuring a smoother and more responsive engine.

The Ul6ynm cylinder head features a high-performance combustion chamber design, which includes a larger intake and exhaust port. This design enhances the flow of air and fuel into the cylinder, optimizing the combustion process and increasing power output. Moreover, the cylinder head is equipped with a high-quality, durable valve train system, including spherical-shaped valves and high-performance springs, ensuring efficient and consistent valve operation.

The BFO Ul6ynm 70cc Cylinder Head is designed to provide enhanced cooling capabilities. It comes with an upgraded cooling system, featuring a larger cooling fin area and improved cooling channels. This cooling system helps to dissipate heat more effectively, preventing engine overheating and ensuring optimal engine performance.

Additionally, the Ul6ynm cylinder head is manufactured using high-quality materials, ensuring durability and longevity. The cylinder head is CNC-machined to ensure precision and accuracy, ensuring perfect fitment and optimal engine performance.

Upgrading your Honda ATV with the BFO Ul6ynm 70cc Cylinder Head offers numerous benefits, including increased power output, improved torque, enhanced cooling capabilities, and improved overall engine performance. Whether you're looking to enhance the performance of your recreational ATV or maximize the capabilities of your competition machine, the Ul6ynm cylinder head is an excellent investment.

In summary, the BFO Ul6ynm 70cc Cylinder Head is a high-performance upgrade for Honda ATV models, providing increased power, improved cooling, and enhanced durability. Its oversized cylinder bore, high-performance valve train, and upgraded cooling system make it an ideal choice for anyone looking to maximize the performance of their Honda ATV.

Buying a BFO Ul6ynm 70cc cylinder head for Honda ATC70, CT70, TRX70, CRF70, and XR70 72cm3 engines comes with both advantages and disadvantages. Let's examine each of them.

1. Increased Power: The BFO Ul6ynm cylinder head is designed to provide more power compared to the stock cylinder head. This can lead to better performance and improved riding experience.

2. Improved Throttle Response: The new cylinder head design can lead to improved throttle response, making the engine more responsive and easier to ride.

3. Durability: The BFO Ul6ynm cylinder head is made from high-quality materials, ensuring durability and longevity. This can lead to reduced maintenance costs and longer engine life.

4. Enhanced Cooling: The cylinder head features improved cooling capabilities, which can help prevent engine overheating and reduce the risk of engine damage.

1. Cost: The BFO Ul6ynm cylinder head is more expensive than the stock cylinder head. This can be a significant investment for some riders.

2. Installation Complexity: Installing the new cylinder head can be a complex process and may require the assistance of a professional mechanic. This can add to the overall cost of the upgrade.

3. Compatibility: While the BFO Ul6ynm cylinder head is designed to fit various Honda models, there may be compatibility issues for some specific models or variations. It's essential to ensure the cylinder head is compatible with your specific engine before making a purchase.

Ultimately, the decision to buy a BFO Ul6ynm 70cc cylinder head for your Honda ATC70, CT70, TRX70, CRF70, or XR70 72cm3 engine depends on your individual needs and priorities. If you're looking for increased power, improved throttle response, and enhanced durability, this upgrade may be worth the investment. However, if you're concerned about the cost, installation complexity, or compatibility issues, you may want to consider other options.

Before making a purchase, I would recommend thoroughly researching the product, checking its compatibility with your engine model, and considering the benefits and drawbacks carefully. Additionally, consult with a professional mechanic to ensure a successful installation process. If you decide that the benefits outweigh the drawbacks, purchasing the BFO Ul6ynm cylinder head could be an excellent investment for enhancing your riding experience.

Details:

This head will only work with FLAT TOP pistons. For Honda S65.guaranteed Fitment. Fast Shipping.

For Honda TRX70. Manufacturer. Compare the Combustion Chamber Size shown below, to your current head. This head will only work with DOMED pistons.

70cc Cylinder Head Assembly for Honda ATC70 CT70 TRX70 CRF70 XR70 70CC 72CM3. Quick, Simple. Cylinder Head for Honda CRF70 XR70 CT70 C70 ATC70 TRX70 S65 50cc Large Bore / 70cc Small. Always the correct part.

part #: ul6ynm prices

• $19.99-$48.79

specifications cylindermotorcycleiz:

• for models: Ct70, Trx70, Crf70, Xr70
• for makes: Honda
• brand: Bfo
• mpn: Ul6ynm
• bundle listing: Yes
• california prop 65 warning: California Prop 65 Warning
• compatible make: For Honda
• compatible model: Atc70 Crf70 Ct70 C70 Trx70 Xr70 S65
• country of origin: China
• 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: 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

payments cylindermotorcycleiz:

• credit card: Diners-club
• wallet: Apple-pay
• other

returns cylindermotorcycleiz:

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

offer cylindermotorcycleiz:

• availability: In Stock
• options: Ship-to-home
• best offers: True
• started: May 10, 2026
• sold: 0

shipping cylindermotorcycleiz:

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

seller cylindermotorcycleiz:

• # reviews: 1343
• rating: 99.5%
• city: Elk Grove Village, Illinois

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