1. Motorcycle Cylinder Heads & Valve Covers For Sale
  2. sku: 13658398233791663
  3. BFO X45QR2

BFO X45QR2 Cylinder Head Kit Engine 70CC ATC70

fits model: C70, Ct70. make: Honda.

X45qr2 Bfo Cylinder Head Kit For Honda C70 70cc Atc70 Ct70 Engine Components

( Brand: Bfo ), ( Manufacturer Part Number: X45QR2 ), ( 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 Kit Honda 70cc Engine Components fits C70 CT70

The BFO X45QR2 Cylinder Head Kit is an exceptional upgrade for Honda C70, ATC70, and CT70 engines with a 70cc displacement. This cylinder head kit is meticulously designed to enhance the performance and durability of your engine.

The X45QR2 head is a 4-valve design, which allows for improved air and fuel intake, leading to increased power and torque. Each valve is fitted with a robust, OEM-quality valve seat, ensuring a perfect seal and optimal engine efficiency.

The cylinder head kit includes new pistons, rings, and cylinder liners. The pistons are engineered from high-strength forged aluminum alloy, which reduces weight, increases durability, and provides superior heat transfer properties. The piston rings are made from a heat-resistant material to ensure proper sealing and minimize the risk of piston ring wear. The cylinder liners are precision-machined, ensuring a perfect fit and a smooth, even surface for optimal engine performance.

The X45QR2 cylinder head kit also features new, high-performance spark plugs, which ensure reliable ignition and improved combustion efficiency. Additionally, the kit includes new, high-quality head gaskets, which are essential for maintaining the proper seal between the engine block and cylinder head.

The BFO X45QR2 Cylinder Head Kit is a direct replacement for the original equipment, making installation straightforward and hassle-free. It is engineered to OEM specifications, ensuring a perfect fit and seamless integration with your Honda engine. With this upgrade, you can expect improved engine performance, increased power, and enhanced durability for your Honda C70, ATC70, or CT70.

Pros and Cons of Buying a BFO X45QR2 Cylinder Head Kit for Honda C70, Ct70, and ATC70 Engines

The BFO X45QR2 cylinder head kit is a popular aftermarket upgrade for Honda C70, Ct70, and ATC70 engines. This upgrade can provide better performance, improved cooling, and enhanced durability. However, like any other aftermarket part, it comes with its advantages and disadvantages.

Pros:

1. Enhanced Performance: The BFO X45QR2 cylinder head kit is designed to provide better performance by increasing the engine's compression ratio and improving the flow of air and fuel into the cylinders. This results in increased power and torque.

2. Improved Cooling: The new cylinder head design includes larger cooling fins and improved cooling passages. This allows the engine to run cooler, reducing the risk of overheating and increasing the engine's longevity.

3. Durability: The BFO X45QR2 cylinder head kit is made from high-quality materials, including forged aluminum pistons and a reinforced cylinder head gasket. This results in increased durability and longer engine life.

4. Cosmetic Appeal: The new cylinder head design includes a polished finish, giving the engine a more attractive appearance.

Cons:

1. Cost: The BFO X45QR2 cylinder head kit can be expensive, especially when compared to the cost of a stock cylinder head.

2. Installation Complexity: Installing the BFO X45QR2 cylinder head kit can be a complex process that requires specialized tools and expertise.

3. Potential Compatibility Issues: Although the BFO X45QR2 cylinder head kit is designed to fit Honda C70, Ct70, and ATC70 engines, there may be compatibility issues with certain models or variations.

Conclusion:

The BFO X45QR2 cylinder head kit is an excellent upgrade for Honda C70, Ct70, and ATC70 engines, providing better performance, improved cooling, and enhanced durability. However, it comes with a higher cost and a complex installation process. If you're willing to invest in the upgrade and have the necessary expertise to install it, the benefits outweigh the drawbacks.

Recommendation:

If you're considering purchasing a BFO X45QR2 cylinder head kit for your Honda C70, Ct70, or ATC70 engine, make sure to research the compatibility of the kit with your specific model and year. Additionally, consider seeking the help of a professional mechanic to ensure a proper installation. While the cost may be higher than a stock cylinder head, the performance and durability improvements can be worth the investment.

Details:

For Honda S65. Quick, Simple. Always the correct part. This head will only work with DOMED pistons.

Manufacturer. For Honda TRX70. 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.

This head will only work with FLAT TOP pistons.guaranteed Fitment. Fast Shipping. Cylinder Head Kit For Honda C70 70cc ATC70 CT70 Engine Components.

part #: x45qr2 prices

  • $19.99-$48.69

specifications cylindermotorcycleiz:

  • for models: C70, Ct70
  • for makes: Honda
  • brand: Bfo
  • mpn: X45qr2
  • 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

seller cylindermotorcycleiz:

  • city: Elk Grove Village, Illinois
  • rating: 99.3%
  • # reviews: 1019

payments cylindermotorcycleiz:

  • other
  • credit card: Mastercard
  • wallet: Paypal

offer cylindermotorcycleiz:

  • sold: 0
  • best offers: True
  • options: Ship-to-home
  • availability: In Stock
  • started: February 12, 2026

returns cylindermotorcycleiz:

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

general cylindermotorcycleiz:

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

shipping cylindermotorcycleiz:

  • class: Standard
  • carrier: FedEx
  • transit: 5-8 Days
  • service: FedEx Ground / FedEx Home Delivery
  • cost: $0.00
  • type: Fixed
for models: c70, ct70, 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: 13658398233791663,
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