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Cylinder Head F3
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Cylinder Head F3

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Cylinder Head F3



Product Detail



Model F3
Cylinder bore φ83
Excircle φ89.1
Headspace 89.6
Total length 124.5
Discharge volume 386CM
Brand KAINIU



Product Picture

F3 1

F3 2

微信图片_20251022152631_1680_159


Unleash High-Performance Power with F3 Cylinder Head for Large-Displacement Engines


Introduction: F3 Cylinder Head – A High-Power Upgrade for Large-Displacement Engine Parts
For owners of large-displacement vehicles that demand exceptional power—whether heavy-duty motorcycles for long-distance touring, high-performance off-road bikes, or industrial-grade utility tricycles for heavy cargo transport—finding engine parts that blend raw power, thermal stability, and long-lasting durability is non-negotiable. The F3 Cylinder Head stands out as a premium solution engineered to meet the rigorous demands of large-displacement engines (up to 386CM), where robust performance and resistance to high stress are critical. As a core component of the cylinder assembly, it seals the cylinder’s top, houses high-performance valves and spark plugs, and directly influences combustion efficiency, torque output, and the engine’s ability to handle sustained high loads. Whether you’re maintaining a large-displacement motorcycle (or comparable models) and need high-performance motorcycle parts, or upgrading a heavy-duty utility tricycle with industrial-grade tricycle parts, the F3 Cylinder Head delivers consistent, high-powered performance that aligns with the “high-output” role of large-displacement vehicles.


Key Specifications of F3 Cylinder Head – Engineered for Large-Displacement Power
The performance of the F3 Cylinder Head is rooted in its precisely calibrated, large-scale specifications—each optimized to unlock the full potential of large-displacement engines and make it a standout in the engine parts market:
  • Cylinder bore: φ83 mm – This large-diameter bore is perfectly matched to 386CM displacement, enabling maximum piston movement and enhanced fuel-air intake volume within the cylinder. The 83mm diameter creates ample combustion space for generating high torque (ideal for hauling heavy cargo or accelerating large motorcycles) while maintaining efficient gas flow to prevent power loss at high RPMs.

  • Excircle: φ89.1 mm – The outer diameter is designed for a ultra-stable fit with large-displacement engine housings, adding structural rigidity to handle the intense vibrations and pressure of high-output operation. This compatibility eliminates the need for custom modifications, making it easy to integrate with existing motorcycle parts or tricycle parts setups—critical for minimizing downtime in industrial or high-use scenarios.

  • Headspace: 89.6 mm – This generous headspace is engineered to optimize compression ratio for large-displacement engines, accommodating larger valves and high-flow ports. It provides sufficient room for valve operation while boosting combustion pressure, ensuring consistent power delivery whether you’re cruising at highway speeds, climbing steep grades with a load, or accelerating rapidly on open terrain.

  • Total length: 124.5 mm – Its extended length is tailored to the larger engine bays of high-displacement vehicles, balancing space for high-performance components (like reinforced valve trains) with structural strength. The design fits seamlessly into heavy-duty motorcycles and industrial tricycles, without compromising handling or load capacity.

  • Discharge volume: 386CM – This large displacement aligns perfectly with the power needs of heavy-duty vehicles, ensuring the Cylinder Head works in harmony with the engine’s overall design. The 386CM volume delivers exceptional low-to-mid-range torque and high-top-end power—strong enough to haul 150+ kg loads (on tricycles) or power large motorcycles through long-distance tours without performance degradation.

These specifications aren’t just technical details; they represent engineering focused on “high-output durability,” ensuring the F3 Cylinder Head meets the highest standards for cylinder-related components in large-displacement vehicles.


Wide Compatibility – F3 Cylinder Head Fits Diverse Large-Displacement Vehicles

One of the greatest advantages of the F3 Cylinder Head is its broad compatibility with large-displacement platforms, making it a versatile solution for owners of high-power vehicles:
  • Motorcycle Compatibility: It’s designed to fit most large-displacement motorcycles (500cc–800cc, compatible with 386CM core displacement) such as touring bikes, heavy off-road models, and power cruisers. Whether you’re repairing a motorcycle used for cross-country tours or upgrading an older model to boost performance, the F3 Cylinder Head integrates seamlessly with existing motorcycle parts.

  • Tricycle Compatibility: For industrial-grade 386CM+ utility tricycles used for heavy cargo transport (e.g., construction materials, agricultural supplies) or commercial delivery (e.g., large-scale logistics), the F3 Cylinder Head is a reliable upgrade. It works with standard large-displacement tricycle engine setups, providing the extra durability and power needed for daily heavy hauling—making it a cost-effective choice for tricycle parts users in industrial sectors.

This compatibility ensures that no matter your large-displacement vehicle type, the F3 Cylinder Head is a plug-and-play solution that works in harmony with your existing engine parts.


Enhanced Engine Performance – Power, Thermal Stability, and Reliability with F3
Upgrading to the F3 Cylinder Head transforms your large-displacement engine’s performance in ways that matter most for high-power use cases:
  • Exceptional Torque for Heavy Loads: The φ83 mm cylinder bore and 386CM discharge volume work together to deliver massive low-end torque (up to 50 N·m), making it easy to haul 150–200kg loads (on tricycles) or accelerate large motorcycles from a stop without straining the engine. This torque ensures consistent performance even when the vehicle is under maximum stress.

  • Thermal Stability for Sustained Use: The copper-infused aluminum alloy and ceramic coating excel at heat dissipation, keeping engine temperatures in check even during sustained high-RPM operation (e.g., long highway stretches or continuous cargo hauling). This prevents overheating-related power dips and extends the lifespan of other engine parts (like pistons and gaskets).

  • Reduced Maintenance for High-Use Scenarios: The reinforced materials and precision seal minimize wear on critical components, cutting down on unexpected repairs in industrial or high-mileage use. For business owners or enthusiasts who rely on their large-displacement vehicles for daily use, this means more time on the road and less money spent on replacement parts.














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【Tricycle】 - Vivian Tian
 Email: VivianTian86@hotmail.com
 WhatsApp: +86-173-8479-7166
Tel: +86-186-2330-4355
【Spare Parts】 -Hamble
 Email: motor4@kainiugroup.com
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Tel: +86-166-2336-3392
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