Jt Sprocket JTF563.14 Steel Front Sprocket 14 Tooth Made front the latest generation of computer design and control metal cutting equipment for maximum durability All sprockets are heat treated and hand finished to meet or exceed the highest quality standards JT front sprockets are made from SCM420 steel alloy Fits Chain with a 420 pitch Applications: Suzuki A50 Suzuki AP50 - 1975 to 1978 Suzuki ER21 50 - France Suzuki GSX-R50 (RB50 H) - 1988 Suzuki RV50 C Suzuki FR70 - 1975 to 1987 Suzuki FR80 B Suzuki FR80 N,Z,D Yamaha GT MX D,E,F - USA - 1977 to 1979 Yamaha MX80 G,H,J - USA - 1980 to 1982 Yamaha DT50 MX Auto - France - up to 1986 Yamaha FS1 E - 1971 to 1976 Yamaha FS1 E DX Yamaha FS1 EA Yamaha DT80 D,E,F,G,H,J,K - USA - 1977 to 1983 Yamaha GT80 A,B,C,D,E,F,G,H,J - USA - 1973 to 1982 Yamaha RD80 - Norway