Brand New Race-Driven CZ Chain and Steel Sprocket Set. You will receive 1 520-114L MXG Non O-Ring Chain, 1 - 14 tooth front steel sprocket and 1 - 47 tooth rear steel sprocket to replace the chain and sprockets on the following: 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Suzuki RM-Z 450. Race-Driven Steel Sprockets are made from S45C Steel and are manufactured to meet or exceed OEM specifications. Race-Driven offers various types of 520, 525 and 530 CZ Chain. Please make sure when purchasing a chain and sprocket kit you do so according to the engine size of your machine and riding style. All chains include a masterlink and may need to be cut to length. CZ Chains are produced in the Czech Republic using the highest quality products available with German Engineering and Austrian steel. CZ Chain has minimal stretch due to KSJ bush production technology and ISO/TS Standards.