Honda CR250R 1988 - 2007. Honda CR500R 1988 - 2001. Honda CRF450R 2002 - 2018. Honda CRF450RX 2017 - 2018. Honda CRF450X 2005 - 2017. Honda TRX450ER 2006 - 2014. Honda TRX450R 2004 - 2009. Honda TRX700XX 2008 - 2009. Made from SCM-435 Carbon FREE steel and impregnated t zerbreaking risk and extended sprocket life Ultra-hard surface layer (0. 5mm) reduces friction prevent power loss caused by chain drag Fully lightened with radial holes for off-road and street applications Grooved teeth for off-road applications, just like our factory racing parts, allow fast dirt removal