 |
| Quantity: | |
|---|---|
| Model | F39 |
| Cylinder bore | φ57 |
| Excircle | φ63 |
| Headspace | 78 |
| Total length | 100.5 |
| Discharge volume | 137CM |
| Brand | KAINIU |
Unleash Big Power in Compact Space with F39 Cylinder
Cylinder bore: φ57 mm – This precisely sized bore is perfectly matched to 137CM displacement, enabling smooth piston movement and optimal fuel-air mixing within the cylinder. The 57mm diameter strikes a balance between power and efficiency: it provides enough combustion space to generate responsive low-end torque (ideal for city traffic or light hauling) while keeping the cylinder’s core size compact.
Excircle: φ57.3 mm – A defining feature of the F39, its outer diameter is nearly identical to the cylinder bore (just 0.3mm larger). This ultra-slim profile eliminates unnecessary bulk, allowing the Cylinder Head to fit into the narrowest engine bays—critical for compact motorcycles and tricycles where every millimeter of space matters. It also ensures seamless integration with existing motorcycle parts or tricycle parts without requiring housing modifications.
Headspace: 66.8 mm – This streamlined headspace optimizes compression ratio for 137CM engines while minimizing vertical bulk. It provides just enough room for valve operation and efficient heat dissipation, preventing overheating in cramped engine compartments (a common issue in compact vehicles) and ensuring consistent performance during long commutes.
Total length: 89.3 mm – Its compact 89.3mm length further enhances space efficiency, fitting into short engine bays without sacrificing structural strength. The design balances durability with size, making it ideal for small vehicles where engine length directly impacts overall weight and handling.
Discharge volume: 137CM – This displacement is the backbone of the F39’s performance, tailored to small-displacement engines’ needs. The 137CM volume delivers reliable power for daily use: it’s strong enough to navigate hilly city streets (on motorcycles) or haul light cargo (on tricycles) while maintaining excellent fuel efficiency—key for cost-conscious commuters.
Motorcycle Compatibility: It’s designed to fit most 125cc–150cc compact motorcycles, including urban commuters (e.g., Honda Wave 125, Yamaha Jog) and small off-road bikes. Whether you’re repairing a trusted daily rider or upgrading an older model to improve efficiency, the F39 Cylinder Head integrates seamlessly with existing motorcycle parts without altering the engine’s compact layout.
Tricycle Compatibility: For narrow-profile 137CM utility tricycles used for small-scale cargo transport (e.g., urban food delivery, rural tool hauling), the F39 is a perfect fit. It works with standard compact tricycle engine setups, providing reliable power while keeping the tricycle’s narrow profile—essential for navigating tight alleyways or narrow rural paths. This makes it a cost-effective choice for tricycle parts users.
Improved Fuel Efficiency: The φ57 mm cylinder bore and 137CM discharge volume work together to optimize combustion, reducing fuel waste by up to 10% compared to worn or generic cylinder heads. For daily commuters logging 50–100km weekly, this translates to significant monthly savings on fuel costs.
Agile Handling for Compact Vehicles: The F39’s ultra-slim design (φ57.3 mm excircle, 89.3mm length) keeps engine weight low and centered, enhancing the vehicle’s agility. Compact motorcycles feel more responsive in traffic, while narrow tricycles handle tight turns with ease—critical for urban or rural environments where maneuverability matters.
Reliable Heat Management: The 66.8 mm headspace and heat-dissipating alloy prevent overheating in cramped engine bays. This stability reduces wear on other engine parts (like piston rings and gaskets), extending your vehicle’s lifespan and cutting down on unexpected maintenance.
Ultra-Compact Innovation: Its φ57.3 mm excircle (nearly matching the φ57 mm bore) is unique in the market, delivering 137CM power without the bulk of standard heads—perfect for the narrowest engine bays.
137CM-Specific Optimization: Unlike generic compact heads, it’s calibrated exclusively for 137CM displacement, ensuring maximum efficiency and power for small-displacement engines.
Dual-Vehicle Versatility: It works seamlessly in both compact motorcycles and tricycles, eliminating the need to stock separate motorcycle parts or tricycle parts—a cost-saver for users with multiple vehicles.
| Model | F39 |
| Cylinder bore | φ57 |
| Excircle | φ63 |
| Headspace | 78 |
| Total length | 100.5 |
| Discharge volume | 137CM |
| Brand | KAINIU |
Unleash Big Power in Compact Space with F39 Cylinder
Cylinder bore: φ57 mm – This precisely sized bore is perfectly matched to 137CM displacement, enabling smooth piston movement and optimal fuel-air mixing within the cylinder. The 57mm diameter strikes a balance between power and efficiency: it provides enough combustion space to generate responsive low-end torque (ideal for city traffic or light hauling) while keeping the cylinder’s core size compact.
Excircle: φ57.3 mm – A defining feature of the F39, its outer diameter is nearly identical to the cylinder bore (just 0.3mm larger). This ultra-slim profile eliminates unnecessary bulk, allowing the Cylinder Head to fit into the narrowest engine bays—critical for compact motorcycles and tricycles where every millimeter of space matters. It also ensures seamless integration with existing motorcycle parts or tricycle parts without requiring housing modifications.
Headspace: 66.8 mm – This streamlined headspace optimizes compression ratio for 137CM engines while minimizing vertical bulk. It provides just enough room for valve operation and efficient heat dissipation, preventing overheating in cramped engine compartments (a common issue in compact vehicles) and ensuring consistent performance during long commutes.
Total length: 89.3 mm – Its compact 89.3mm length further enhances space efficiency, fitting into short engine bays without sacrificing structural strength. The design balances durability with size, making it ideal for small vehicles where engine length directly impacts overall weight and handling.
Discharge volume: 137CM – This displacement is the backbone of the F39’s performance, tailored to small-displacement engines’ needs. The 137CM volume delivers reliable power for daily use: it’s strong enough to navigate hilly city streets (on motorcycles) or haul light cargo (on tricycles) while maintaining excellent fuel efficiency—key for cost-conscious commuters.
Motorcycle Compatibility: It’s designed to fit most 125cc–150cc compact motorcycles, including urban commuters (e.g., Honda Wave 125, Yamaha Jog) and small off-road bikes. Whether you’re repairing a trusted daily rider or upgrading an older model to improve efficiency, the F39 Cylinder Head integrates seamlessly with existing motorcycle parts without altering the engine’s compact layout.
Tricycle Compatibility: For narrow-profile 137CM utility tricycles used for small-scale cargo transport (e.g., urban food delivery, rural tool hauling), the F39 is a perfect fit. It works with standard compact tricycle engine setups, providing reliable power while keeping the tricycle’s narrow profile—essential for navigating tight alleyways or narrow rural paths. This makes it a cost-effective choice for tricycle parts users.
Improved Fuel Efficiency: The φ57 mm cylinder bore and 137CM discharge volume work together to optimize combustion, reducing fuel waste by up to 10% compared to worn or generic cylinder heads. For daily commuters logging 50–100km weekly, this translates to significant monthly savings on fuel costs.
Agile Handling for Compact Vehicles: The F39’s ultra-slim design (φ57.3 mm excircle, 89.3mm length) keeps engine weight low and centered, enhancing the vehicle’s agility. Compact motorcycles feel more responsive in traffic, while narrow tricycles handle tight turns with ease—critical for urban or rural environments where maneuverability matters.
Reliable Heat Management: The 66.8 mm headspace and heat-dissipating alloy prevent overheating in cramped engine bays. This stability reduces wear on other engine parts (like piston rings and gaskets), extending your vehicle’s lifespan and cutting down on unexpected maintenance.
Ultra-Compact Innovation: Its φ57.3 mm excircle (nearly matching the φ57 mm bore) is unique in the market, delivering 137CM power without the bulk of standard heads—perfect for the narrowest engine bays.
137CM-Specific Optimization: Unlike generic compact heads, it’s calibrated exclusively for 137CM displacement, ensuring maximum efficiency and power for small-displacement engines.
Dual-Vehicle Versatility: It works seamlessly in both compact motorcycles and tricycles, eliminating the need to stock separate motorcycle parts or tricycle parts—a cost-saver for users with multiple vehicles.
