These are made of metal.Additonal Fitment:1992-2001 YAMAHA ET 410TR 1983-1991 YAMAHA VMAX 540 1980-1983 YAMAHA SS 440 1989-2005 YAMAHA VK 540 1978-1978 YAMAHA SSR 1976-1981 YAMAHA EX 1985-1990 YAMAHA XL 5401980-1991 YAMAHA SR 540 1999-1999 YAMAHA PHAZER MOUNTAIN 480 1989-2000 YAMAHA OVATION CS 340 1987-1991 YAMAHA EXCITER 570 1976-1981 YAMAHA SRX 1991-2001 YAMAHA VENTURE VT 480/TF1979-1982 YAMAHA EC 540 1988-1992 YAMAHA SV 80/ 125 1976-1977 YAMAHA STX 1974-1975 YAMAHA GPX (ALL)