Description SPI Tether Switch-High quality tether switch built to OEM specifications. OEM Part Numbers; 410-1067-00Applications:1987 Ski-Doo Nordik 50 1988 Ski-Doo Nordik 50 1989 Ski-Doo Nordik 50 1990 Ski-Doo Nordik 50 1991 Ski-Doo Nordik 50