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This valve Lapping Sticks rotates the valve by hand during lapping so the face and seat show an even contact pattern
Confirm tooth/contact fit
or incorrectly geared sprocket before it ruins a new chain
Transmission gear / internal part
Yamaha XJ650 1982
1977-83 Yamaha XS650 Caliper Piston - 41.3mm - 38mm XS750F 1979 This valve Lapping Sticks rotatesCaliper Piston 41. 3mm 38mm. This brake caliper part services the piston, seal, pad support, or caliper body area where fit and clean hydraulic release are critical. Install it when polishing cannot save the old piston or when corrosion is causing leaks, drag, or uneven brake feel. Fitment Compatibility Fits Yamaha: Yamaha XS400 1978 Yamaha SR500 (1978 79) Yamaha XS650 (1977 81) Yamaha XS650S (1978 83) Yamaha XS750 (1977 79) Yamaha XS850 1981 Yamaha