Yamaha Shock Springs

Yamaha Shock Springs     When installing an extended swingarm on your bike, you drastically alter the leverage ratio and load on your rear shock. In order to maintain the correct suspension action, a new spring is mandatory. At Trac we have a complete selection of springs for almost all sportbikes. For street bikes, a stiffer spring is almost always necessary to compensate for the longer wheelbase of an extended arm, For the serious drag racer however, sometimes a softer spring will allow for the maximum performance. Below is a spring selection chart to illustrate the rates recommended.   Yam R-1 98-01 (8.0kg STOCK) SWINGARM EXTENSION DRAG RACE DRAG RACE STREET STREET LENGTH 175 lbs RIDER 250 lbs RIDER 175 lbs RIDER 250 lbs RIDER 2 INCH STOCK STOCK STOCK 10.7kg 4 INCH STOCK 8.9kg 9.8kg 10.7kg 6 INCH STOCK 9.8kg 9.8kg 11.6kg 8 INCH 8.9kg 9.8KG 10.7kg 12.5kg 10 INCH 9.8kg 10.7kg 11.6kg 13.4kg 12 INCH 10.7kg 11.6kg 12.5kg 14.3kg 14 INCH 10.7kg 11.6kg 13.4kg 15.