■ Super head 4V+R(1 cam 4 valve)
By increasing to two each in and ex valves to expand the valve curtain area, achieved a high intake and exhaust efficiency.
Since designed an original cylinderhead shape for 4 valve, achieved high output.
Combustion chamber is finished with high accuracy by NC machining.
■Intake and exhaust efficiency of SOHC premier class
Valve diameter:IN:25mm×2 / EX:21.5mm×2
Valve stem shaft diameter: IN, EX both 4.5mm
By adopting the unequal pitch valve spring, to prevent surging at high rotation.
Painted black to the surface of cylinder head.
Adopted an aluminum die-cast barrel polishing finish to the L. cylinder head side cover,breather cover and inspection cover.
■Forged aluminum roller rocker arm
It is possible to reduce the frictional resistance between the camshaft, achieved the smooth operation !!