(1) new NGK D7EA spark plug fits the following models.
Yamaha YFM200 1985-1989
Yamaha YFM225 1986-1989
Yamaha YFM250 1989-1991
Yamaha Timberwolf YFB250 1992-2000
Yamaha Bear Tracker YFM25X 1999-2002
* OEM Quality *
Triple-Gasket Sealing Process *
Consistent Performance *
Plug of Choice in Millions of Motorcycles, ATVs, and Scooters Triple-Gasket Sealing Process Virtually eliminates the possibility of combustion gas leakage through the shell. Most other manufacturers only use two seals. Solid-Copper Core Produces a more powerful spark with less firing voltage. Other manufacturers use a "copper coated" center core. Cold-Rolled Threads For easier removal and installation. Corrosion Resistant Zinc Chromate Coating double dipped for maximum protection. An NGK exclusive. Alumina Silicate Insulator Is virtually pure to insure dielectric and physical strength, as well as heat transfer away from the tip for maximum performance. Corrugated Ribs Eliminate "flashover", which can cause misfiring and engine damage, especially in damp environments.