Combustion chamber diameter: 62 mm Inlet diameter: 28mm, hole spacing 62mm M6 Exhaust diameter: 27mm, clearance 54mm M6 Spark plug thread: M12x1.25
Intake valve: Length: 92mm, Diameter: 30 mm Shaft diameter: 5.5 mm
Exhaust valve: Length 91.6 mm Diameter: 25 mm Shaft diameter: 5.5 mm
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Cylinder head LONCIN 150cc 4T 27mm