BFO 4EY12S Cylinder Head Kit 70CC ATC70 50CC

( Brand: Bfo ), ( Manufacturer Part Number: 4EY12S ), ( Bundle Listing: Yes ), ( 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

BOF 4EY12S Cylinder Head Kit for Honda ATV Models: ATC70, CRF70F, XR70, CT70, and C70, 50cc

The BOF 4EY12S Cylinder Head Kit is a high-quality replacement part specifically designed for Honda's line of popular all-terrain vehicles (ATVs) including the ATC70, CRF70F, XR70, CT70, and C70 models with a 50cc engine. This cylinder head kit is an essential upgrade for any Honda ATV owner looking to restore their machine's performance or prevent potential engine issues.

This BOF cylinder head kit comes complete with all necessary components to replace the worn-out or damaged cylinder head on your Honda ATV. The kit includes the following items: cylinder head gasket, camshaft, intake valves, exhaust valves, valve guides, valve springs, and retainers. Each component is meticulously engineered and manufactured to ensure precise fitment and optimal engine functionality.

The cylinder head gasket in this kit is made of a high-performance material that provides an excellent sealing surface between the cylinder head and the engine block. This gasket ensures a tight seal, minimizing the risk of coolant or combustion leaks.

The camshaft in the BOF 4EY12S Cylinder Head Kit is designed to provide the perfect balance of power and efficiency for your Honda ATV. The camshaft features optimally designed lobes and duration to deliver smooth power delivery and improved throttle response.

The intake and exhaust valves in this kit are engineered for durability and performance. They are made from high-strength materials to withstand the rigors of off-road riding, ensuring reliable engine operation. The valves are also designed to provide optimal air and fuel flow for improved combustion efficiency and power output.

The valve guides in the BOF 4EY12S Cylinder Head Kit are precision-machined to ensure a perfect fit and alignment of the valves. This results in reduced friction, improved sealing, and enhanced engine performance.

The valve springs and retainers in this kit are designed to provide the necessary force and retention to keep the valves in their proper place during engine operation. These components are also engineered to withstand the high temperatures and pressures encountered in an ATV engine.

In summary, the BOF 4EY12S Cylinder Head Kit is an essential upgrade for any Honda ATV owner looking to restore their machine's performance, prevent potential engine issues, or maintain optimal engine functionality. This complete kit includes all necessary components for a successful cylinder head replacement, ensuring a precise fit, improved engine performance, and reliable operation.

Buying a BFO 4EY12S cylinder head kit for Honda ATV models like the ATC70, CRF70F, XR70, CT70, and C70 50cc comes with both advantages and disadvantages. Let's examine each in detail:

1. Performance improvement: The BFO 4EY12S cylinder head kit is designed to increase power and torque, enhancing the overall performance of the ATV.

2. Durability: This kit is made of high-quality materials that can withstand the rigors of off-road riding, providing a longer lifespan compared to the stock cylinder head.

3. Customization: If you're looking to personalize your ATV, this cylinder head kit offers an excellent opportunity to boost its power output and make it stand out from the crowd.

1. Cost: The BFO 4EY12S cylinder head kit can be quite expensive compared to the stock cylinder head. The investment required may not be justifiable for those who only use their ATV casually.

2. Complex installation: Installing the cylinder head kit requires a significant amount of mechanical expertise and experience. It may be time-consuming and potentially frustrating for those without the necessary skills.

3. Risk of damage: Installing the new cylinder head incorrectly can lead to engine damage, which could incur additional repair costs.

The BFO 4EY12S cylinder head kit offers several advantages, including performance improvement, durability, and customization. However, the high cost, complex installation process, and potential risk of damage may deter some buyers. Ultimately, the decision to purchase this kit depends on your budget, mechanical skills, and desired level of ATV performance.

If you are an experienced rider, enjoy off-road racing, and have a good understanding of engine mechanics, the BFO 4EY12S cylinder head kit could be an excellent investment for your Honda ATV. However, if you're a casual rider or lack the necessary mechanical skills, it may be best to stick with the stock cylinder head. Consider consulting a professional mechanic if you're unsure about the installation process.

Details:

For Honda S65. Compare the Combustion Chamber Size shown below, to your current head. This head will only work with DOMED pistons.guaranteed Fitment.

Cylinder Head Complete Kit for Honda 70cc ATC70 CRF70F XR70 CT70 C70 / 50cc. Always the correct part. Manufacturer. This head will only work with FLAT TOP pistons.

Quick, Simple. Cylinder Head for Honda CRF70 XR70 CT70 C70 ATC70 TRX70 S65 50cc Large Bore / 70cc Small. Fast Shipping. For Honda TRX70.

part #: 4ey12s prices

• $19.99-$47.59

specifications cylindermotorcycleiz:

• for models: Crf70f, Xr70, Ct70, C70
• for makes: Honda
• brand: Bfo
• mpn: 4ey12s
• bundle listing: Yes
• 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:

• started: June 5, 2025
• availability: In Stock
• quantity: 2
• sold: 0
• best offers: True
• options: Ship-to-home

general cylindermotorcycleiz:

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

returns cylindermotorcycleiz:

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

seller cylindermotorcycleiz:

• # reviews: 941
• city: Rowland height, California
• rating: 98.5%

payments cylindermotorcycleiz:

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

shipping cylindermotorcycleiz:

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

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