ApplicationCompatible for YAMAHA ROADSTAR 17002004-2007 compatible for YAMAHA ROADSTAR 16001999-2003 compatible for YAMAHA ROADSTAR WARRIOR 1700 2002-2009 compatible for YAMAHA VMX12 V-MAX 1985-2007 compatible for YAMAHA XVZ 13 VENTURE ROYAL STAR 1986-2013 (The spring kit converts your diaphragm spring clutch system to a coil spring system.)SpecificationWarranty: one year warranty for any manufacturing defect Condition: New Quantity: As the picture showNotice-Instruction is not included. Professional installation is recommended -Contact us please for whatever we can help