Long-reach type spark plugs are used. This type of spark plug allows the area of the cylinder head that receives the spark plugs to be made thick. Thus, the water jacket can be extended near the combustion chamber, which contributes to cooling performance.
Iridium-tipped spark plugs are used to achieve a 192000 km (120000 miles) maintenance interval. By making the center electrode of iridium, it is possible to achieve superior ignition performance and durability compared to platinum-tipped spark plugs.
|*1||Water Jacket||*2||Iridium Tip|
|*3||Platinum Tip||*4||Long-reach Type Spark Plug|
|*5||Long-reach Type Spark Plug||-||-|