- 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
Yamaha -- CE 50 Jog -- (1996, 1998, 2003, 1987, 1990, 2002, 1995, 1997, 1994, 2001, 2004, 1986, 1989, 1992, 1999, 2000, 1991, 1993, 2005); Yamaha -- SH 50 Razz -- (1993)