KTM uses dual ignition to improve the quality of ignition and the engine efficiency of its four-stroke engines. From model year 2012 on, the Duke 690’s one-cylinder engine already featured NGK’s LKAR8BI-9 as central spark plug and the LMAR7A-9, which is installed laterally. With its slim 0.6 mm Iridium tip on the centre electrode, the former ensures optimal mixture accessibility and combustion along a long service interval, as the precious metal protects the electrodes from wear and corrosion. The LMAR7A-9, however, is a standard nickel-type spark plug. Its special feature is its long-reaching thread, which is 26.5 mm long and just 10 mm wide. The slim design is necessary to enable both spark plugs to be fitted in only one cylinder.
A similar winning combination is used for the 1290 Super Duke R: The strongest two-cylinder engine for the bike, which has been available since last year, features an Iridium spark plug from NGK as OE – the LKAR9BI-9. Apart from having a different heat range, it is identical to the central spark plug of the Duke 690. As in the Duke 690, the nickel-type LMAR7A-9 assists the primary plug in lateral mounting position.
Additionally, NGK is supplying KTM with spark plugs for models announced for 2015. Like the Dukes, the new long-distance enduros from KTM, the 1050 Adventure and 1290 Super Adventure, operate with dual ignition. However, these motorbikes come with two Iridium spark plugs installed in each cylinder. The LKAR9BI-10 can be found in central position, the LMAR7DI-10 laterally. Both feature a long-reaching and slim thread and an enlarged electrode gap to further improve combustion quality. Additionally, the ground electrode of the LMAR7DI-10 was designed in “Taper Cut Design”, which means that the ground electrode is shorter and comes with tapered edges.
About NGK: NGK is the world’s leading manufacturer of spark plugs, glow plugs and lambda sensors. The Company runs production plants and sales organisations all over the world. With a total of 13,000 employees, the Company generates an annual turnover of around 2.7 billion euros. NGK is represented on all continents and has 43 group companies, 24 production plants and 5 technical centres.
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