The Engine Head Valve Set is a high-performance internal powertrain component kit engineered for Honda 125cc automatic scooter engines. Operating deep inside the combustion chamber of the cylinder head assembly, this matched pair consists of an Intake Valve (larger head diameter) to regulate the induction of the fresh air-fuel charge, and an Exhaust Valve (smaller head diameter) to rapidly evacuate spent combustion gases.
As shown in the product image image_0169ea.png, this premium kit contains both highly critical valves machined to exact factory specifications. Forged from specialized heat-treated alloys, these valves ensure an airtight structural seal against the valve seats. This completely restores factory compression levels, eliminates hard-starting issues, and maximizes your engine’s power output.
Key Features:
-
Premium Heat-Resistant Alloys: The exhaust valve is engineered from high-grade, high-tensile stellite/austenite steel to handle intense combustion temperatures without warping, while the intake valve is optimized for fluid dynamics.
-
Precision Ground Micro-Finished Stems: Valve stems are induction-hardened and ground to a micro-finish, ensuring smooth, friction-free movement within the valve guides without oil seepage.
-
Airtight Seating Face Profile: Precision-angled faces ensure a perfect, flush interface with the cylinder head valve seats, as displayed in image_0169ea.png, preventing compression loss and pressure blow-by.
-
Restores Engine Compression & Pickup: Eliminates carbon pitting and face distortion, instantly solving cold-start issues, rough idling, and sudden low-end power drops.
-
Excellent Thermal Conductivity: Engineered to rapidly dissipate heat away from the valve face up through the stem guide and into the cylinder head cooling fins, preventing pre-ignition knock.
Technical Specifications:
-
Component: Engine Cylinder Head Valve Set (Intake & Exhaust)
-
Material: High-Tensile, Heat-Treated Austenitic & Stellite Alloy Steel
-
Kit Quantity: 2 Pieces (1x Intake Valve, 1x Exhaust Valve)
-
Fitment Position: Cylinder Head Assembly / Combustion Chamber
-
Country of Origin: India
Scooter Compatibility
-
Honda Activa 125 (All Generations): Fits first-generation carbureted variants, HET models, and modern BS6 fuel-injected (PGM-Fi) platforms.
-
Honda Grazia 125 (All Models): Fully compatible with carbureted and BS6 generations sharing Honda’s standard 125cc scooter engine architecture.
-
Honda Dio 125: Suitable for the newer 125cc sports scooter lineup utilizing this valve train configuration.










Reviews
There are no reviews yet