Description
4-Valve Racing cylinder head for use on Big Bore cylinders for Yamaha 5ML engines. The cylinder head comes with reinforced valve springs and valves. The intake valves are 23mm in diameter and the exhaust valves are 21mm. The port on the intake is 27mm and the exhaust has a cross section of 26mm. Not suitable for 125cc original cylinders! The cylinder head is delivered without rocker arm.AI-translation
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