The three-pole (three-jaw) spark plug A7TC is a high-performance spark plug suitable for motorcycles/quads/scooters with 50cc/70cc/90cc/110cc engine displacement.

【High-Performance Three-Electrode Design】 This product is a three-electrode spark plug (also known as a three-pole spark plug), model A7TC. Compared to conventional single-electrode spark plugs, the three-electrode design provides more ignition paths, theoretically reducing electrode wear, extending service life, and improving ignition reliability, especially by supporting stable combustion under demanding engine conditions.

【Heat Rating and Standard Thread】 The A7TC model features a specific heat range (7 for medium to cold temperatures) and a standard thread. The thread diameter is 14 mm, the pitch is 1.25 mm, and the wrench spacing is 20.6 mm (13/16 inches). These specifications are common for many small-displacement motorcycles and small general-purpose engines. [Main Compatible Vehicle Models and Engine Sizes] This thread was specifically designed for small-displacement, air-cooled, four-stroke engines and is suitable for a wide variety of vehicles: Engine sizes: 50cc, 70cc, 90cc, 110cc. Examples of vehicles: mopeds, scooters, children's/youth ATVs, small off-road motorcycles, general-purpose gasoline engines (generators, water pumps, etc.).