Starter Relay Solenoid for LT80, LT-Z50, LTZ50Z, LT-Z50Z, Quad Sport Z50, LTZ50, LTZ, LT-Z 50, LT 80 2X4, part numbers 31800-40B01 and 31800-40B00.12 V starter relay solenoid ignition switch.Constructed with metal, plastic, and aluminum components.Features shell protection to prevent leakage and damage.Designed for stable and easy installation with direct plug-in capability.Terminal markings: “B” for connection and “M” for motor connection—must not be reversed.Compatible with the following models: CE50 (1986–1987) Champ 100 YFM100 (1987–1991) Breeze 125 YFA1 (1989–2004) Big Wheel 200 BW200E (1986–1988) Big Bear 250 YFM250, YFM250B (2007–2009) Big Bear 350 YFM350FW 4X4 (1987–1999) Big Bear 350 YFM350U 2X4 (1996–1999) Big Wheel 350 BW350 (1987–1988) Big Bear 400 YFM400 2X4 (2000–2004) Big Bear 400 YFM400H 2X4 (2001–2002) Big Bear 400 YFM400F 4X4 (2000–2006) Big Bear 400 YFM400FH 4X4 Buckmaster (2000) Big Bear 400 YFM400FH 4X4 (2001) Big Bear 400 YFM400FH 4X4 Tree X-TRA (2002) Big Bear 400 YFM400FB IRS (2007) Big Bear 400 YFM400FB 4X4 (2008–2012) Big Bear 400 YFM400FBH 4X4 Hunter Edition (2008–2012) LT-Z50 Quad Sport (2006–2010) LTZ50 Quad Sport Z50 (2006–2009, 2015–2016) LT-Z50Z Quad Sport (2006–2010) LT80 (1987–2001) LT80 Quad Sport (2002–2006) LT80 Quad Sport 80 2X4 (1987–2006)