51
CAMSHAFT
The camshaft is made of cast iron and is designed for high rigidity as a solid structure. The rear portion is formed as
a single body by pressure–insertion of the signal rotor.
4–valve Models
∅27.0
Cam height (mm) IN EX IN EX
35.984 35.986 31.147 29.550
VALVES/VALVE SPRINGS
Valves are subjected to Tuffride treatment on the entire surface, increasing wear resistance. The valve springs use
single springs have unequal pitch, increasing the conformity of the valves and preventing jumping. The valve springs are
used in common on both the intake side and the exhaust side. The valve guides are used in common both on the intake
side and exhaust side, and are pressed into the cylinder head. The valve sheets are made of a special annealed alloy
having excellent durability and are pressed into the cylinder head.
VALVE SPECIFICATION INTAKE VALVE EXHAUST VALVE
flat 15° sheet face 45°
Angle
flat 15° sheet face 45°
4–valve models
Total length (mm) IN EX
Stem diameter (mm)
92.07 80.51
Umbrella diameter (mm)
φ5.5
φ25.6 φ22.4
VALVE SPRING SPECIFICATION
Intake valve
Exhaust valve
φ 5.5
φ 5.5
Valve Springs (shared by
intake and exhaust)
Install having paint side
(rough wound side) facing up
Line diameter (mm)
φ3.3
7.20
37.09
Total wind No.
Free length (mm)
VALVE SPRING SPECIFICATION
IN(°)
EX(°)
Contact width (mm)
4–valve models: IN 1.2 EX 1.2
To Next Page
Loading...
