NGK is setting standards in meeting highest quality demands. By employing progressive engineering we ensure a performance level to satisfy also extreme conditions. Standard Model: * OEM Quality * Triple-Gasket Sealing Process * Consistent Performance * Plug of Choice in Millions of Vehicles Iridium Model: The “secret” of the Iridium IX spark plug is its laser-welded electrode made of iridium. Thanks to its exceptional thin diameter of 0.6 mm it bundles ignition voltage, thus improving combustion at any speed. The engine runs smoothly, the motorcycle accelerates faster. Also, the high-tech metal iridium keeps the distance between the electrodes completely stable, thus preventing the engine from backfiring. Compatible with: - Honda: VT 1100 C2 Shadow_M, VT 1100 Shadow_M, VT 750 Shadow_M - Kymco: Dynk 125/150_S, Gran Dynk 250_S, People 250/300_S, Xciting 250/300_S - Suzuki: VL 1500 Intruder_M, VS 800 Intruder_M - Yamaha: Dragstar 650_M, MT-01_M, Royal Star 1300_M, SRX 600_M, TT 600_M, TT S 600_M, XT 600 E_M, XT 600_M, XV 1600_M, XV 1700_M