Rear Stop Switch. This rear stop switch triggers the brake-light circuit from rear brake pedal movement and must match the spring, bracket, and wiring layout.Install this rear stop switch during brake service when the brake light stays on, never lights, or only works when the switch or harness is moved.Fitment / CompatibilityFits Yamaha: Yamaha RD250 (1973-75) Yamaha R5 1970 Yamaha R5B 1971 Yamaha R5C 1972 Yamaha RD350 (1973, 1975) Yamaha RD350A 1974 Yamaha RD400 (1976-79) Yamaha TX650 (1973-74) Yamaha XS1 1970 Yamaha XS1B 1971 Yamaha XS2 1972 Yamaha XS650 (1975-81) Yamaha XS650S (1978-83) Yamaha XS750 1978 Yamaha XS1100 (1978-81) Product Details Brake light switch Brake position: Rear Sold individually XS650Direct part number: 12-0009 Before Ordering Confirm switch type, thread or mount style, connector ends, and brake-side location. Test continuity and brake-light operation before riding.