- Superior construction for serious power
- Versatile plugs with wide operating heat ranges prevent fouling from running too cool and preignition from running too hot
- Features high alumina ceramics for improved heat dissipation and electrical insulation, deep-seated copper core for a wider heat range and a nickel alloy tip for longer life
Arctic Cat -- Kitty Cat 60 -- (1978, 1980, 1977, 1982, 1993, 1979, 1995, 1996, 1981, 1997, 1994, 1998); Arctic Cat -- Kitty Cat -- (1992, 1999, 1987, 1978, 1991, 1998, 1977, 1989, 1995, 1997, 2000, 1985, 1993, 1980, 1981, 1988, 1994, 1996, 1979, 1986, 1990); Royal Enfield -- Bullet 350 -- (1971); Yamaha -- FS1 50 DX -- (1980, 1979); Honda -- MR50K Elsinore -- (1974, 1975)