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CYLINDER WORKS Cylinder Head for Yamaha (Standard Bore, 125cc) Upgrade your 2-stroke off-road performance with the CYLINDER WORKS Cylinder Head —a new replacement designed for the Yamaha standard bore application. Built to support modern cam setups and sharper combustion efficiency, this head is a smart choice for riders seeking stronger throttle response and race-inspired flow. Key Features New replacement cylinder head for reliable fit and function Competition valve job for improved sealing and performance Shortened valve guides to accept higher lift cams Unshrouded combustion chamber to enhance airflow and burn efficiency Blended bowl seat to port for smoother flow transition Stock-shaped ports for consistent setup and compatibility Made in the USA Does not include valves, springs, or lifters Specifications Engine Type: 2-Stroke Product Name: Cylinder Head Units: Each Color/Finish: Gray Riding Style: Off-Road Displacement: 125 cc Weight: 0.75 lbs Dimensions: 5.48" x 5.18" x 2.84"