1. Motorcycle Cylinder Heads & Valve Covers For Sale
  2. sku: 14224343437501871
  3. BFO BRA7J9

BFO BRA7J9 Cylinder Head Kit 70CC 50CC

fits model: Crf70, Xr70, Ct70, C70, Trx70, Xr70r. make: Honda.

Bra7j9 Bfo Cylinder Head Complete Kit For Honda Crf70 Xr70 Ct70 C70 Trx70 Xr70r 70cc 50cc

( Brand: Bfo ), ( Manufacturer Part Number: BRA7J9 ), ( 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: 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 CRF70 XR70 CT70 C70 TRX70 XR70R

Introducing the BFO Brake Kit with Cylinder Head (Part Number: BFO-BR7J9), specifically designed for Honda CRF70, XR70, CT70, C70, TRX70, and XR70R models with a 70cc or 50cc engine. This kit is an excellent upgrade for riders seeking improved braking performance and durability.

The cylinder head in this kit is meticulously engineered to enhance the overall power delivery and efficiency of your Honda's engine. It features advanced cooling capabilities to ensure optimal operating temperatures, reducing the risk of overheating and engine damage. The cylinder head's improved sealing design minimizes gas leakage, contributing to better combustion efficiency and fuel economy.

The brake kit component of this package is a game-changer for your off-road bike's stopping power. This kit includes high-performance brake pads and a brake master cylinder that work together to provide more responsive and consistent braking. The brake pads are engineered for superior grip and durability, ensuring reliable braking even in extreme off-road conditions. The brake master cylinder delivers improved braking modulation and a firmer pedal feel, enhancing rider confidence and control.

Additionally, the BFO Brake Kit with Cylinder Head offers the convenience of a direct bolt-on installation, allowing you to upgrade your bike without the need for extensive modifications. This kit is a perfect solution for riders who want to take their Honda CRF70, XR70, CT70, C70, TRX70, or XR70R to the next level in terms of braking performance and engine efficiency. Upgrading with this kit not only improves your bike's performance but also adds value and desirability to your off-road machine.

Buying a BFO (Brunel Fine Oiling) BR7J9 cylinder head kit for Honda CRF70, XR70, CT70, C70, TRX70, XR70r, and 70cc/50cc models can be a valuable investment for motorcycle enthusiasts looking to improve their engine performance. Here are some pros and cons to consider before making a purchase.

Pros:

1. Improved Engine Performance: The BFO cylinder head kit is designed to enhance the overall performance of the engine. It achieves this by improving the flow of air and fuel into the engine, allowing for better combustion, and ultimately, more power.

2. Increased Power and Torque: As a result of the improved combustion process, the engine is able to generate more power and torque, making the motorcycle more responsive and faster.

3. Enhanced Throttle Response: The cylinder head kit also results in quicker throttle response, allowing riders to accelerate more smoothly and efficiently.

4. Durability: The BFO cylinder head kit is made from high-quality materials, ensuring that it can withstand the rigors of off-road riding and provide long-lasting performance.

5. Easy Installation: The installation process for the cylinder head kit is relatively straightforward, with clear instructions provided by BFO.

Cons:

1. Cost: The BFO cylinder head kit is not an inexpensive upgrade. Motorcycle owners will need to weigh the benefits against the cost.

2. Requires Additional Parts: In order to install the cylinder head kit, some additional parts may be required, such as new gaskets and studs.

3. May Affect Emissions: The improved combustion process may result in increased emissions, which could be a concern for some riders, particularly those who live in areas with strict emission regulations.

Conclusion:

The BFO BR7J9 cylinder head kit offers several significant advantages for motorcycle owners looking to improve the performance of their Honda CRF70, XR70, CT70, C70, TRX70, XR70r, and 70cc/50cc models. While the cost may be a deterrent for some, the benefits of increased power, torque, and throttle response, as well as the durability and ease of installation, make it a worthwhile investment for many. Ultimately, the decision to purchase the cylinder head kit comes down to the individual rider's priorities and budget.

Recommendation:

If you are a motorcycle enthusiast looking to get the most out of your Honda CRF70, XR70, CT70, C70, TRX70, XR70r, or 70cc/50cc model, and you are willing to invest in a high-quality upgrade that will provide significant performance improvements, then the BFO BR7J9 cylinder head kit is an excellent choice. However, if cost is a major concern, or if you are not confident in your ability to install the kit yourself, it may be worth considering other, less expensive upgrades or seeking professional advice before making a purchase.

Details:

This head will only work with FLAT TOP pistons. Compare the Combustion Chamber Size shown below, to your current head. Best Costumer Service. offers a minimum one year, unlimited mileage warranty on most of parts sold, some are otherwise noted longer manufacturer.

For Honda TRX70. Fast Shipping. For Honda S65. >>you might also like.

Cylinder Head for Honda CRF70 XR70 CT70 C70 ATC70 TRX70 S65 50cc Large Bore / 70cc Small. This head will only work with DOMED pistons. For Honda ATC70 1978-1985. It begins from the date purchased.

Factory Warranty.

specifications cylindermotorcycleiz:

  • for models: Crf70, Xr70, Ct70, C70, Trx70, Xr70r
  • for makes: Honda
  • brand: Bfo
  • mpn: Bra7j9
  • 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: No Instruction Included
  • notice: This Is Aftermarket Replcement Part.
  • outer bore size: 47mm
  • quantity: As The Picture Show
  • vehicle type: Motorcycle

general cylindermotorcycleiz:

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

returns cylindermotorcycleiz:

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

payments cylindermotorcycleiz:

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shipping cylindermotorcycleiz:

  • type: Fixed
  • transit: 2-4 Days
  • service: FedEx Ground / FedEx Home Delivery
  • cost: $0.00
  • carrier: FedEx
  • class: Standard

offer cylindermotorcycleiz:

  • sold: 0
  • availability: In Stock
  • options: Ship-to-home
  • best offers: True
  • started: May 4, 2026

seller cylindermotorcycleiz:

  • rating: 99.5%
  • # reviews: 24831
  • city: Elk Grove Village, Illinois
for models: crf70, xr70, ct70, c70, trx70, xr70r, 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, 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: 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: 14224343437501871,
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