CONSTRUCTION
The cylinder head structure is simplified by separating the cam journal portion (camshaft housing sub-assembly) from the cylinder head.
The cylinder head sub-assembly, which is made of aluminum, contains pentroof-type combustion chambers. The spark plug is located in the center of the combustion chamber in order to improve the engine's anti-knock performance.
A taper squish combustion chamber is used to improve anti-knock performance and intake efficiency. In addition, engine performance and fuel economy are improved.
| *1 | Camshaft Bearing Cap | *2 | Camshaft Housing |
| *3 | Cylinder Head Sub-assembly | *4 | Spark Plug Hole |
| *5 | Exhaust Valve | *6 | Intake Valve |
| *a | Exhaust Side | *b | Intake Side |
| *c | Taper Squish | *d | View from Bottom Side |
| *e | A-A Cross Section | - | - |