05-14 Yamaha TT-R230 TTR 230 12 Tooth Front Sprocket for MX Motorcross Dirtbike Brand New 12 Tooth Front Steel Sprocket Race-Driven sprockets are manufactured to exceed OEM specifications Race-driven sprockets are produced using hardened S45C steel Fits 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 Yamaha TT-R230