CHAMPION, COPPER PLUS SPARK PLUG. N12YC
H-D 5R6A. 14mm threaded, long reach. Used with a 21mm spark plug socket. Copper-core center electrode. Spark plug comes with the patented Ultraseal™ coated shell, to help keep the spark plug body corrosion free and better looking for a longer period of time.

Fits: > L78-E82 FL; L78-79 FX; 84-99 B.T.(excl. TC); 75-E78 FL, FX