Pistons made are with high quality, permanent skirt coating to reduce friction and piston rock for quiet and improved performance Optimized machining for lightness, as well as maintained strength in key areas such as crown and skirt wall cross section Forged from aerospace grade aluminum alloy Piston kits includes piston, rings, pin and clips - Yamaha RD 400 (1976, 1977, 1979, 1978); Yamaha Banshee 350 4x2 (1988, 1996, 1998, 1999, 2006, 1989, 1991, 1994, 1995, 1987, 1992, 1993, 2000, 2004, 2005, 2001, 2002, 2003, 1990, 1997); Yamaha RD 350 (1974, 1975, 1973); Yamaha RD 350 LC (1982, 1981, 1983); Yamaha RZ 350 (1985, 1984)