By replacing your stock shock linkage with a DeVol Transformer Pull-Rod, you have the option of adjusting up to 5 settings for adaption to various terrain and to attain the feel YOU want! All DeVol Transformer Pull- Rods stiffen the initial rising rate of a shock and lowers the rear end gradually with each longer setting. Not only are there multiple settings in the Transformer Pull-Rod alone, but it opens up opportunity for endless customized suspension setup options to give you a serious edge on the competition.Features: Performance enhancement linkage Best for MX & Offroad Up to 5 adjustment settings May lower rear end up to 1/4* -1/2* on various models Lightweight Stronger than stock Stiffens initial rising rate resulting in slightly softer rear suspension Allows rear-end to track straighter Improves front end stability Anodized factory look All models include bearings/seals Available for most models Made from aerospace grade billet aluminum 100% Made in the U.S.A. Fitment Yamaha YZ250F 2005 Yamaha YZ250F 2006 Yamaha YZ250F 2007 Yamaha YZ250F 2008 Yamaha YZ250F 2010 Yamaha YZ250F 2011 Yamaha YZ250F 2012 Yamaha YZ250F 2013 Yamaha YZ450F 2005 Yamaha YZ450F 2006 Yamaha YZ450F 2007 Yamaha YZ450F 2008