1. Motorcycle Cylinder Heads & Valve Covers For Sale
  2. sku: 12502170507623751
  3. BFO Q4LB37

BFO Q4LB37 Cylinder Head Rebuild Kit Engine ATC70 50CC 70CC

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

Q4lb37 Bfo Cylinder Head Rebuild Kit For Honda Atc70 Crf70 Ct70 C70 Trx70 50cc 70cc Engine

( Brand: Bfo ), ( Manufacturer Part Number: Q4LB37 ), ( 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 Rebuild Kit Honda 50cc 70cc Engine fits CRF70 CT70 C70 TRX70

Introducing the BFO Q4lb37 Cylinder Head Rebuild Kit, an essential solution for Honda ATC70, CRF70, CT70, C70, and TRX70 engine models with 50cc and 70cc engines. This comprehensive rebuild kit is specifically designed to address the wear and tear that comes with regular use, ensuring your engine operates at its peak performance.

The BFO Q4lb37 kit includes an array of high-quality components, meticulously engineered to fit your Honda engine precisely. These parts are manufactured to meet or exceed OEM specifications, ensuring a reliable and long-lasting repair.

The kit consists of the following components:

1. New cylinder head gasket: This essential gasket seals the connection between the engine block and cylinder head, preventing coolant and oil from mixing and maintaining optimal compression.

2. New valve guide seals: These seals ensure that the valve stems maintain a snug fit within the cylinder head, preventing oil leaks and optimizing engine performance.

3. New piston rings: The piston rings seal the gap between the piston and cylinder wall, preventing combustion gases from escaping and ensuring efficient engine operation.

4. New valve springs: These critical components help maintain the proper valve position, ensuring optimal engine performance and longevity.

5. New valve retainers: These essential components hold the valves in place, allowing them to function properly and maintain proper engine compression.

6. New valves: These components regulate the flow of air and fuel into the engine, allowing it to combust efficiently and produce power.

7. New camshaft and lifters: The camshaft and lifters work together to control the opening and closing of the engine's valves, ensuring proper engine timing and performance.

This BFO Q4lb37 Cylinder Head Rebuild Kit is a must-have for anyone looking to restore their Honda ATC70, CRF70, CT70, C70, or TRX70 engine to like-new condition. With its high-quality components, precise fitment, and durable construction, this kit offers an affordable and effective solution for engine repairs. Whether you're a professional mechanic or a dedicated hobbyist, this kit has everything you need to get the job done right the first time.

Buying a BFO Q4LB37 cylinder head rebuild kit for Honda ATC70 CRF70 CT70 C70 TRX70 50cc 70cc engines comes with both advantages and disadvantages.

Advantages:

1. Cost-effective: A rebuild kit is generally more cost-effective than buying a new cylinder head. It allows you to repair the existing component rather than replacing it entirely.

2. Customizable: The kit includes all the necessary parts for rebuilding the cylinder head. You can choose the quality and type of parts according to your budget and performance requirements.

3. Improved Performance: A rebuilt cylinder head can improve engine performance by fixing any issues that may have been causing power loss or poor fuel efficiency.

Disadvantages:

1. Time-consuming: Rebuilding a cylinder head is a complex and time-consuming process that requires a good deal of mechanical knowledge and experience. It may be more convenient to buy a new cylinder head and have it installed by a professional.

2. Risk of Damage: There is a risk of damaging other engine components during the rebuilding process. For example, if the piston rings are not installed correctly, they could damage the cylinder walls.

3. Quality of Parts: The quality of the parts included in the rebuild kit can vary significantly. Some aftermarket parts may not be as durable or reliable as OEM (original equipment manufacturer) parts.

Conclusion:

A BFO Q4LB37 cylinder head rebuild kit for Honda ATC70 CRF70 CT70 C70 TRX70 50cc 70cc engines can be a cost-effective solution for engine repairs, but it comes with some risks and challenges. If you have the mechanical knowledge and experience to rebuild the cylinder head, and you're confident in the quality of the parts, then it could be a good option. However, if you're not comfortable with the process or if you're concerned about the quality of the parts, it may be worth considering buying a new cylinder head instead.

Recommendation:

If you have the mechanical knowledge and experience to rebuild the cylinder head, and you're confident in the quality of the parts, then a BFO Q4LB37 cylinder head rebuild kit for Honda ATC70 CRF70 CT70 C70 TRX70 50cc 70cc engines could be a cost-effective solution for engine repairs. However, if you're not confident in your abilities or if you're concerned about the quality of the parts, it may be worth considering buying a new cylinder head instead. Alternatively, you could consider having a professional mechanic rebuild the cylinder head for you to ensure that the job is done correctly and that the parts used are of high quality.

Details:

This head will only work with DOMED pistons. For Honda TRX70. Cylinder Head for Honda CRF70 XR70 CT70 C70 ATC70 TRX70 S65 50cc Large Bore / 70cc Small.

For Honda S65. Compare the Combustion Chamber Size shown below, to your current head. For Honda ATC70 1978-1985. This head will only work with FLAT TOP pistons.

part #: q4lb37 prices

  • $19.99-$83.25

specifications cylindermotorcycleiz:

  • for models: Crf70, Ct70, C70, Trx70
  • for makes: Honda
  • brand: Bfo
  • mpn: Q4lb37
  • 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

returns cylindermotorcycleiz:

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

seller cylindermotorcycleiz:

  • # reviews: 2246
  • rating: 96.7%
  • city: Elk Grove Village, Illinois

offer cylindermotorcycleiz:

  • options: Ship-to-home
  • started: September 17, 2025
  • availability: In Stock
  • sold: 0
  • best offers: True

shipping cylindermotorcycleiz:

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

general cylindermotorcycleiz:

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

payments cylindermotorcycleiz:

  • other
  • credit card: Diners-club
  • wallet: Paypal
for models: crf70, ct70, c70, trx70, 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: 12502170507623751,
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