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: - Aprilia: Pegaso 650 Factory_M, Pegaso 650 Strada_M - Kawasaki: VN 800_M - Kymco: XCITING 500_S - Piaggio: Liberty 125_S - Suzuki: Bandit GSF 1250_M, Burgman 400 01-06_S, Burgman 400 07-_S, Burgman 400 99-00_S - Yamaha: Majesty 400 -08_S, Majesty 400 09-_S, MT-03_M, T-MAX 500 -03_S, T-MAX 500 04-07_S, T-MAX 500 08-11_S, T-Max 530 12-_S, XT 660 R 07-_M, XT 660 X 07-_M, XTZ 660 Tenerè 08-_M