BFO R4HQB1 Cylinder Head Kit ATC70 70CC 50CC

( Brand: Bfo ), ( Manufacturer Part Number: R4HQB1 ), ( 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 50cc fits XR70 CT70 C70 CRF 1970

BFO R4HQB1 Cylinder Head Kit for Honda CRF 70 (XR70, CT70, C70, ATG70, 70cc, 50cc)

The BFO R4HQB1 Cylinder Head Kit is a high-performance upgrade designed specifically for Honda CRF 70 models, including XR70, CT70, C70, ATG70, and those with 70cc and 50cc engine capacities. This kit is an excellent choice for riders seeking improved power, durability, and reliability for their off-road machine.

This cylinder head kit comes with a high-performance cylinder head and all necessary hardware, ensuring a seamless installation process. The cylinder head is made from premium materials, featuring a large intake port for increased airflow and improved combustion efficiency. The head design also includes optimized combustion chamber shape and size to enhance power output and reduce emissions.

One of the standout features of the BFO R4HQB1 Cylinder Head Kit is its durability. The cylinder head is designed to withstand the rigors of off-road riding, ensuring long-lasting performance. It features reinforced material in critical areas to resist wear and tear, as well as improved cooling fin design for optimal engine temperature management.

Installation of the BFO R4HQB1 Cylinder Head Kit is straightforward, with clear instructions provided. The kit includes all the required hardware, making it easy to complete the installation process in a timely and efficient manner. Additionally, the kit is compatible with both stock and aftermarket exhaust systems, offering flexibility for riders.

By upgrading to the BFO R4HQB1 Cylinder Head Kit, Honda CRF 70 riders can expect noticeable improvements in engine power, torque, and overall performance. This kit is an excellent investment for those seeking to enhance the capabilities of their off-road vehicle and take their riding experience to the next level.

Buying a BFO R4HQB1 Cylinder Head Kit for Honda CRF 70: A Comprehensive Analysis

The BFO R4HQB1 cylinder head kit is a popular aftermarket upgrade for various Honda CRF models including the XR70, CT70, C70, and AT70 with 70cc and 50cc engines. This analysis aims to provide you with the pros and cons of investing in this cylinder head kit.

1. Enhanced Performance: The BFO R4HQB1 cylinder head kit is designed to provide improved engine performance. This includes increased horsepower and torque, resulting in better acceleration and overall riding experience.

2. Durability: The kit is made from high-quality materials that are expected to last longer than the original OEM parts. This could potentially save you money in the long run, as you may not need to replace the cylinder head as frequently.

3. Customizability: The BFO R4HQB1 cylinder head kit offers more tuning options compared to the stock OEM parts. This can be beneficial for those who are looking to fine-tune their engine for specific riding conditions or preferences.

4. Improved Engine Efficiency: The upgraded cylinder head can lead to better fuel efficiency, as the engine operates more efficiently and requires less fuel to produce the same amount of power.

5. Enhanced Cooling: The cylinder head kit comes with improved cooling features, which can help prevent engine overheating, thus ensuring a more consistent riding experience.

1. Cost: The BFO R4HQB1 cylinder head kit is more expensive than the stock OEM parts. This could be a deterrent for some buyers, especially those on a tight budget.

2. Installation Complexity: Installing the cylinder head kit can be a complex process that may require specialized tools and technical expertise. This could potentially lead to additional costs for professional installation or the need to invest in new tools.

3. Potential Compatibility Issues: Although the BFO R4HQB1 cylinder head kit is designed to fit various Honda CRF models, there may be instances where it does not fit perfectly or may require additional modifications for a proper installation.

4. Potential Performance Variations: While the cylinder head kit is expected to provide performance improvements, the actual performance gains may vary depending on the specific engine condition and the rider's riding style.

5. Risk of Damage: Installing aftermarket parts like the BFO R4HQB1 cylinder head kit may increase the risk of damaging other engine components if not installed correctly. Proper installation and maintenance are crucial to ensure the longevity and optimal performance of the upgraded engine.

The BFO R4HQB1 cylinder head kit is an attractive upgrade for those looking to enhance the performance and durability of their Honda CRF 70 engines. However, the higher cost, installation complexity, and potential compatibility issues are important factors to consider before making a purchase. Ultimately, the decision to invest in this upgrade depends on your budget, technical expertise, and desired riding experience. If you are confident in your ability to install the kit correctly and are willing to invest in the upgrade for the potential performance gains, then the BFO R4HQB1 cylinder head kit could be a worthwhile investment. Otherwise, it may be best to stick with the stock OEM parts.

Details:

This head will only work with DOMED pistons. This head will only work with FLAT TOP pistons. For Honda ATC70 1978-1985. Compare the Combustion Chamber Size shown below, to your current head.

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

For Honda S65.

part #: r4hqb1 prices

• $19.99-$47.59

specifications cylindermotorcycleiz:

• for models: Xr70, Ct70, C70, Crf
• for makes: Honda
• for years: 1970
• brand: Bfo
• mpn: R4hqb1
• 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

payments cylindermotorcycleiz:

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

shipping cylindermotorcycleiz:

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

general cylindermotorcycleiz:

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

seller cylindermotorcycleiz:

• # reviews: 5895
• rating: 99.3%
• city: Elk Grove Village, Illinois

offer cylindermotorcycleiz:

• best offers: True
• sold: 0
• started: March 26, 2026
• availability: In Stock
• options: Ship-to-home

returns cylindermotorcycleiz:

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

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