Jt Sprocket JTF563.12 Steel Front Sprocket 12 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 RM50 C,N,T - USA - 1978 to 1980 Suzuki RM60 N - USA - 1979 Suzuki RM60 T,X,Z,D - USA - 1980 to 1983 Suzuki AP50 - France Suzuki DR50 Suzuki GT50 KB,KN,KX - 1977 to 1980 Suzuki TS50 ERN,T,X,Z,K - 1980 to 1984 Suzuki TS50 ER - Norway - 1980 to 1983 Suzuki TS50 KC,KM - 1979 Suzuki TS50 KN - 1979 Suzuki ZR50 K-N,X - 1980 to 1984 Yamaha YZ50 G - 1980 Yamaha TY80 Yamaha DT50 MX Auto - France - 1986 to 1988 Yamaha RD50 M Spoke Wheel - 1978 Yamaha RD50 MX - 1979 to 1980 Yamaha RD50 MX - 1981 to 1987 Yamaha RD50 MX Auto - France Yamaha RX50 K,L Special - USA - 1983 to 1984 Yamaha RX50 M K,L Midnight Special - USA - 1983 to 1984 Yamaha TY50 M - Germany - 1978 to 1981 Yamaha YSR50 (2AL) - 1986 to 1992