1. Motorcycle Cylinder Heads & Valve Covers For Sale
  2. sku: 13887454494012782
  3. MAXPEEDINGRODS EVIR08

MAXPEEDINGRODS EVIR08 Cylinder Head Kit Performance 70CC 50CC

fits model: Xr70, Ct70, C70, Crf. make: Honda. year: 1970.

Evir08 Maxpeedingrods Cylinder Head Complete Kit For Honda Crf 70 Xr70 Ct70 C70 70cc 50cc Performance

( Brand: Maxpeedingrods ), ( Manufacturer Part Number: EVIR08 ), ( 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 MAXPEEDINGRODS Cylinder Head Complete Kit Honda 50cc Performance fits XR70 CT70 C70 CRF 1970

Introducing the Maxxis Racing Products EVIR08 Cylinder Head Kit, specifically designed for Honda CRF 70 (XR70, CT70, C70), CRF50F, and ELT250R models with 70cc and 50cc engines. This cylinder head kit is an excellent choice for riders seeking top-tier performance, durability, and reliability for their off-road motorcycles.

The EVIR08 kit includes an oversized 416cc cylinder, a high-performance, CNC-machined aluminum cylinder head, and a matching piston. This oversized cylinder provides increased displacement and power output, making it suitable for more demanding riding conditions. The CNC-machined aluminum cylinder head features larger intake and exhaust ports, which improve air and fuel flow for optimal combustion. Additionally, the head sports 4 valves, which enhance engine breathing and efficiency.

To ensure the best possible sealing and durability, the kit includes high-performance O-rings, gaskets, and copper head bolts. The copper head bolts are designed to maintain consistent clamping pressure throughout the engine's operating temperature range, ensuring a strong seal between the head and the cylinder.

The EVIR08 cylinder head kit also includes a performance camshaft and a set of high-performance valve springs. The camshaft offers increased lift and duration, which improves engine response and power delivery. The high-performance valve springs ensure proper valve control under high-RPM conditions, ensuring optimal performance and longevity.

In conclusion, the Maxxis Racing Products EVIR08 Cylinder Head Kit is a comprehensive performance upgrade for Honda CRF 70, CRF50F, ELT250R, and CRF50R models. This kit provides increased displacement, improved combustion, enhanced engine breathing, and superior sealing and durability. It is an excellent choice for riders seeking maximum power and performance from their off-road motorcycles.

The Maxximus Racing (Maxpeedingrods) EVIR08 cylinder head kit is designed for various Honda CRF models, including the XR70, CT70, C70, and 70cc/50cc versions. This kit is aimed at enhancing the performance of these small off-road bikes. Here's a list of potential pros and cons to help you make an informed decision about purchasing this cylinder head kit.

Pros:

1. Improved Power: The EVIR08 cylinder head kit is designed to increase power output. This is achieved through the use of higher-flowing ports and improved combustion efficiency.

2. Enhanced Thermal Efficiency: The kit includes a high-performance exhaust valve and a larger intake valve, which can help improve thermal efficiency and reduce engine temperatures.

3. Increased Fuel Efficiency: Due to the improved combustion efficiency, this kit can potentially lead to increased fuel efficiency.

4. Durability: The components in this kit are made from high-quality materials, which can lead to increased durability and longevity.

5. Easy Installation: The kit comes with detailed installation instructions, making the process as straightforward as possible.

Cons:

1. Cost: The EVIR08 cylinder head kit is more expensive than a standard replacement cylinder head.

2. Complexity: Installing this kit requires a certain level of mechanical competence and the right tools.

3. Potential Power Increase: Depending on the specific application and the bike's original condition, the power increase might not be significant.

4. Legal Considerations: In some areas, modifying the engine of a small off-road bike might be against local regulations.

5. Potential Warranty Issues: Modifying the engine might void the bike's factory warranty.

Conclusion:

The Maxximus Racing (Maxpeedingrods) EVIR08 cylinder head kit for various Honda CRF models can potentially lead to increased power, improved thermal efficiency, and increased fuel efficiency. However, it comes with a higher cost, requires a certain level of mechanical expertise, and might not result in significant power gains for all applications. Additionally, there are legal considerations and potential warranty issues to take into account.

Recommendation:

If you're looking to significantly enhance the performance of your Honda CRF 70, consider the Maxximus Racing (Maxpeedingrods) EVIR08 cylinder head kit. However, be prepared for the added cost, the complexity of the installation process, and the potential legal and warranty implications. This kit is best suited for experienced riders who are comfortable with mechanical work and understand the potential benefits and risks involved. If you're unsure, consult with a professional mechanic or the local motor sports association for advice.

Details:

We established cooperation's with EM tron, Mote, LINK, Cartel, Him, etc. 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. PRODUCTS Cylinder Head Complete Kit For Honda CRF 70 XR70 CT70 C70 70cc 50cc Performance.

MaXpeedingrods always follow the development concept that Success derives from devotion and happiness comes sharing to make contributes domestic overseas car tuning enthusiasts global racing culture by excellent products service. MaXpeedingrods has a longstanding commitment to the research of ECU, engine, gearbox and vehicle performance electronic calibration. This head will only work with DOMED pistons. For Honda S65.

For Honda TRX70. This head will only work with FLAT TOP pistons.

specifications cylindermotorcycleiz:

  • for models: Xr70, Ct70, C70, Crf
  • for makes: Honda
  • for years: 1970
  • brand: Maxpeedingrods
  • mpn: Evir08
  • 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

offer cylindermotorcycleiz:

  • started: March 16, 2026
  • best offers: True
  • sold: 0
  • availability: In Stock
  • options: Ship-to-home

shipping cylindermotorcycleiz:

  • service: Standard
  • type: Fixed
  • class: Standard
  • transit: 3-7 Days
  • cost: $0.00

general cylindermotorcycleiz:

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

seller cylindermotorcycleiz:

  • city: Elk Grove Village, Illinois
  • rating: 99.2%
  • # reviews: 31260

payments cylindermotorcycleiz:

  • other
  • wallet: Apple-pay
  • credit card: Discover

returns cylindermotorcycleiz:

  • time: 30 Days
  • policy: Returns Accepted
  • paid by: Seller
for models: xr70, ct70, c70, crf, for makes: honda, for years: 1970, 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: 13887454494012782,
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