The GL-125 valve is a core engine component designed for the GL-125 motorcycle, responsible for controlling the intake of air-fuel mixture and the exhaust of combustion gases, directly impacting engine power and efficiency.
Tailored specifically to the CG125’s single-cylinder engine, this valve is engineered for precise performance and durability. It features a high-strength metal construction (typically stainless steel or alloy steel) to withstand extreme temperatures, high pressure, and repeated opening/closing cycles during engine operation. The valve’s surface is often treated with anti-wear and heat-resistant coatings to reduce friction and prevent premature wear. Its precise dimensions (including stem length, head diameter, and seating angle) ensure a tight seal with the cylinder head, avoiding gas leakage and maintaining optimal engine compression. Whether for routine maintenance or replacement, it restores the CG125 engine’s original air-fuel control capability, supporting reliable daily commuting and light-duty riding.
1. Precise Sealing Performance: The valve’s accurately machined seating surface and proper fit with the cylinder head ensure a tight seal, preventing air-fuel or exhaust gas leakage and maintaining stable engine compression.
2. Exceptional Heat & Wear Resistance: Made of high-strength heat-resistant metal with anti-wear treatment, it endures the high temperatures (up to 800-1000°C) and mechanical friction inside the engine, extending service life.
3. Perfect CG125 Compatibility: Engineered to match the CG125 engine’s specifications (e.g., stem diameter, head size), it requires no modification for installation, ensuring seamless integration with existing engine components.
4. Stable Engine Performance: By reliably controlling intake and exhaust timing, it optimizes the air-fuel mixture ratio and exhaust efficiency, directly boosting the CG125’s power output and fuel economy.
1. CG125 Engine Maintenance: Used to replace worn, bent, or leaking valves during routine engine servicing, restoring normal intake/exhaust function.
2. Aftermarket Replacement: A cost-effective option for CG125 owners needing to fix valve-related issues (e.g., poor compression, rough idling) without original equipment premium.
3. Motorcycle Repair Shops: Essential inventory for shops servicing CG125 models, enabling quick valve replacements to minimize customer downtime.
4. CG125 Engine Rebuilds: Critical component for rebuilding aged or damaged CG125 engines, ensuring the rebuilt engine meets performance and reliability standards.
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Specification Item |
Details |
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Model Compatibility |
CG125 motorcycle single-cylinder engine (intake & exhaust valve options) |
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Material |
High-strength alloy steel (intake valve); heat-resistant stainless steel (exhaust valve) |
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Valve Head Diameter |
Intake: ~30-32 mm; Exhaust: ~26-28 mm (matches CG125 cylinder head specs) |
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Valve Stem Diameter |
~5-6 mm (precision-machined for tight guide fit) |
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Valve Stem Length |
~100-105 mm (varies by exact engine year, OEM-equivalent) |
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Seating Angle |
45° (standard angle for CG125 engine valve seats) |
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Surface Treatment |
Valve stem: Chrome plating (anti-wear); Valve head: Heat-resistant coating |
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Operating Temperature Range |
Exhaust valve: Up to 1000°C; Intake valve: Up to 800°C |
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Service Life |
~30,000-40,000 km (under normal riding and maintenance) |
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Certification |
Complies with ISO motorcycle parts quality standards |
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