CG125 motorcycle spark plug, thread size (M12×1.25), heat range (D8TC) matches the CG125 engine ignition system 1:1, suitable for Honda CG125, Pearl River 125 and other 125cc push-rod engine models, directly replacing the original spark plug without adjustment; the electrode is made of iridium/nickel alloy, offering excellent conductivity and strong ignition energy, capable of reliably igniting the air-fuel mixture, addressing issues such as idle vibration and insufficient power; the ceramic insulator is made of high-alumina ceramic, resistant to temperatures above 1200°C; the metal shell is rust-resistant, preventing insulation breakdown and shell corrosion with long-term use; comes with a high-temperature resistant sealing ring, ensuring a tight fit to the cylinder head to prevent cylinder leakage and maintain stable engine compression; follows Japanese manufacturing standards, features a low electrode wear rate, with a service life of 8000-10000 km, reducing the frequency of replacements.