JT Rear Sprocket 39 Tooth 420 Pitch JTR832.39 Fits Yamaha FS1 50 1977-1980

Yamaha FS1 50 1Y0 1977. Yamaha FS1 50 DX 1Y2 1977. Yamaha FS1 50 1Y0 1978. Yamaha FS1 50 DX 1Y2 1978. Yamaha FS1 50 DX 3F2 1979. Yamaha FS1 50 DX 3F2 1980. JT Sprockets manufactures in the right way: by turning, milling and drilling!

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