Complete 3/4in. bore rear master cylinder assemblies. Polished and chrome-plated. Replaces OEM #42521-07 Harley Davidson XL1200C Sportster 1200 Custom 2007-2013 Harley Davidson XL1200L Sportster 1200 Low 2007-2011 Harley Davidson XL1200N Sportster 1200 Nightster 2007-2012 Harley Davidson XL1200R Sportster 1200 Roadster 2007-2008 Harley Davidson XL1200V Seventy-Two 2012-2013 Harley Davidson XL1200X Forty-Eight 2010-2013 Harley Davidson XL50 50th Anniversary Sportster 2007 Harley Davidson XL883 Sportster 2007-2008 Harley Davidson XL883C Sportster 883 Custom 2007-2009 Harley Davidson XL883L Sportster 883 Low 2007-2010 Harley Davidson XL883L SuperLow 2011-2013 Harley Davidson XL883N Iron 883 2009-2013 Harley Davidson XL883R Sportster 883 Roadster 2007