This motorcycle starter relay solenoid (Part #278003012) is compatible with a range of models including Challenger 718/720 (2000–2001), Explorer 718/720 (2002), GS720/GS 720 (1999–2001), LE 720 (2000–2005), GTS 720 (2003–2004), Speedster 718/720 (1999–2000), Sportster models (1998–2000), RFI 800 (1999–2005), SPX 800 (1998–2000), Spark 900 (2014–2016), DI 951 (2000–2007), GSX LTD 951 (1998–1999), and numerous 1503cc engine models from 2003–2016.Constructed with metal, plastic, and aluminum components for.