The champion copper plus spark plug for yamaha ag 100 1980-1984 is part of the latest collection from champion.Features: features a copper core center electrode that allows for accurate control of heat range, optimizing performance and longevity of the spark plug patented sac-9 semi-conductor resistor for maximum emi and rfi suppression patented ultrasealâ coated shell for rust prevention specifications: center electrode projection: non-projected center electrode type: standard electrode tip material: nickel alloy ground electrode configuration: single ground electrode shape: standard heat range: 4 hex size imperial: 13 16 hex size metric: 20.6 Mm hex size: 20.6 Mm 13 16 model: n4c product name: spark plug research value: finalized to fit: aprilia amico 50 gl 1994 european models aprilia amico 50 gl 1995 european models aprilia amico 50 gl 1996 european models aprilia amico 50 gl 1997 european models aprilia amico 50 gl 1998 european models aprilia amico 50 gl 1999 european models aprilia amico 50 gl 2000 european models aprilia amico 50 lx 1995 european models aprilia amico 50 lx 1996 european models aprilia amico 50 1990 european models aprilia amico 50 1991 european models aprilia amico 50 1992 european models aprilia amico 50 1993 sport european models aprilia amico 50 1993 european models benelli devil 50 1994 european models benelli devil 50 1995 european models benelli spring 50 1994 european models benelli spring 50 1995 european models bultaco sherpa s 200 1962 a...