| Model | YBR125 |
| Cylinder bore | φ54 |
| Excircle | φ60 |
| Headspace | 65.3 |
| Total length | 88 |
| Discharge volume | 123CM |
| Brand | KAINIU |



Elevate YBR125 Performance with Authentic YBR125 Cylinder
Introduction:
YBR125 Cylinder Head – A Core Upgrade for Iconic 125cc Engine Parts
For owners of the iconic YBR125 motorcycle—whether used for daily urban commutes, weekend leisure rides, or light off-road adventures—finding engine parts that match the bike’s legendary reliability and performance is non-negotiable. The YBR125 Cylinder Head stands out as a purpose-built solution, engineered to restore and enhance the 125cc engine’s signature smoothness and efficiency. As the centerpiece of the cylinder assembly, it seals the cylinder’s top, houses critical components like valves and spark plugs, and directly influences combustion quality, torque output, and the engine’s long-term durability. Whether you’re maintaining a vintage YBR125 with genuine motorcycle parts or upgrading a compatible 125cc utility tricycle with trusted tricycle parts, the YBR125 Cylinder Head delivers the consistency and fit that YBR125 enthusiasts and small-displacement vehicle owners demand.
Cylinder bore: φ54 mm – This precision-calibrated bore is a perfect match for the YBR125’s 125cc engine, ensuring seamless piston movement and optimal fuel-air mixing within the cylinder. The 54mm diameter balances power and efficiency: it generates enough combustion pressure for responsive acceleration (ideal for merging into traffic or climbing gentle hills) while keeping fuel consumption low—key for cost-conscious daily riders.
Excircle: φ60 mm – The outer diameter is engineered to fit the YBR125’s engine housing like a glove, eliminating the need for modifications. This snug fit ensures structural stability, reduces vibration, and guarantees compatibility with the bike’s original motorcycle parts—a critical factor for owners seeking to maintain the YBR125’s factory-level performance.
Headspace: 65.3 mm – This carefully calculated headspace optimizes the YBR125’s compression ratio, supporting smooth valve operation and efficient heat dissipation. It prevents engine overheating during prolonged use (such as hour-long commutes) and ensures consistent power delivery, even in variable temperature conditions—from hot summer days to cool autumn mornings.
Total length: 88 mm – Its compact 88mm length aligns with the YBR125’s streamlined engine bay design, avoiding unnecessary bulk that could impact the bike’s handling. The slim profile also makes it a compatible upgrade for 125cc utility tricycles with space-constrained engine layouts, doubling as a reliable tricycle part for small-scale hauling.
Discharge volume: 123CM – This displacement is nearly identical to the YBR125’s factory 125cc output, ensuring the Cylinder Head works in perfect harmony with the engine’s existing components. The 123CM volume delivers the YBR125’s signature low-end torque, making it easy to navigate stop-and-go traffic or cruise at steady speeds without straining the engine.
Authentic YBR125 Fit: Unlike generic heads, it’s engineered exclusively for the YBR125, ensuring it matches the bike’s performance and fitment exactly.
Legacy of Reliability: It carries the YBR125’s reputation for durability, making it a long-term investment rather than a temporary fix.
Versatile Value: It works for both YBR125 motorcycles and 125cc tricycles, offering more value than single-use motorcycle parts or tricycle parts.
Order Your YBR125 Cylinder Head Today – Restore Your YBR125’s Glory
If you’re ready to revive your YBR125’s performance or upgrade your 125cc tricycle with YBR125-level reliability, the YBR125 Cylinder Head is the perfect choice.Ordering is simple: visit our website, search for “YBR125 Cylinder Head,” and complete your purchase in minutes. Our customer support team (with expertise in YBR125 engines) is available 24/7 to answer questions about compatibility or installation.
| Model | YBR125 |
| Cylinder bore | φ54 |
| Excircle | φ60 |
| Headspace | 65.3 |
| Total length | 88 |
| Discharge volume | 123CM |
| Brand | KAINIU |



Elevate YBR125 Performance with Authentic YBR125 Cylinder
Introduction:
YBR125 Cylinder Head – A Core Upgrade for Iconic 125cc Engine Parts
For owners of the iconic YBR125 motorcycle—whether used for daily urban commutes, weekend leisure rides, or light off-road adventures—finding engine parts that match the bike’s legendary reliability and performance is non-negotiable. The YBR125 Cylinder Head stands out as a purpose-built solution, engineered to restore and enhance the 125cc engine’s signature smoothness and efficiency. As the centerpiece of the cylinder assembly, it seals the cylinder’s top, houses critical components like valves and spark plugs, and directly influences combustion quality, torque output, and the engine’s long-term durability. Whether you’re maintaining a vintage YBR125 with genuine motorcycle parts or upgrading a compatible 125cc utility tricycle with trusted tricycle parts, the YBR125 Cylinder Head delivers the consistency and fit that YBR125 enthusiasts and small-displacement vehicle owners demand.
Cylinder bore: φ54 mm – This precision-calibrated bore is a perfect match for the YBR125’s 125cc engine, ensuring seamless piston movement and optimal fuel-air mixing within the cylinder. The 54mm diameter balances power and efficiency: it generates enough combustion pressure for responsive acceleration (ideal for merging into traffic or climbing gentle hills) while keeping fuel consumption low—key for cost-conscious daily riders.
Excircle: φ60 mm – The outer diameter is engineered to fit the YBR125’s engine housing like a glove, eliminating the need for modifications. This snug fit ensures structural stability, reduces vibration, and guarantees compatibility with the bike’s original motorcycle parts—a critical factor for owners seeking to maintain the YBR125’s factory-level performance.
Headspace: 65.3 mm – This carefully calculated headspace optimizes the YBR125’s compression ratio, supporting smooth valve operation and efficient heat dissipation. It prevents engine overheating during prolonged use (such as hour-long commutes) and ensures consistent power delivery, even in variable temperature conditions—from hot summer days to cool autumn mornings.
Total length: 88 mm – Its compact 88mm length aligns with the YBR125’s streamlined engine bay design, avoiding unnecessary bulk that could impact the bike’s handling. The slim profile also makes it a compatible upgrade for 125cc utility tricycles with space-constrained engine layouts, doubling as a reliable tricycle part for small-scale hauling.
Discharge volume: 123CM – This displacement is nearly identical to the YBR125’s factory 125cc output, ensuring the Cylinder Head works in perfect harmony with the engine’s existing components. The 123CM volume delivers the YBR125’s signature low-end torque, making it easy to navigate stop-and-go traffic or cruise at steady speeds without straining the engine.
Authentic YBR125 Fit: Unlike generic heads, it’s engineered exclusively for the YBR125, ensuring it matches the bike’s performance and fitment exactly.
Legacy of Reliability: It carries the YBR125’s reputation for durability, making it a long-term investment rather than a temporary fix.
Versatile Value: It works for both YBR125 motorcycles and 125cc tricycles, offering more value than single-use motorcycle parts or tricycle parts.
Order Your YBR125 Cylinder Head Today – Restore Your YBR125’s Glory
If you’re ready to revive your YBR125’s performance or upgrade your 125cc tricycle with YBR125-level reliability, the YBR125 Cylinder Head is the perfect choice.Ordering is simple: visit our website, search for “YBR125 Cylinder Head,” and complete your purchase in minutes. Our customer support team (with expertise in YBR125 engines) is available 24/7 to answer questions about compatibility or installation.