Fork springs from Wirth Progressively wrapped fork springs for improved driving behavior - chassis improvement, progressive fork springs harder than the original! - No more punches - fewer brems, no sponges. - Air support falls away - no more blowing of the simmering - better response - Ideal replacement for slack original springs with high running performance - Tested and recommended by leading motorcycle magazines - Light construction with detailed instructions Yamaha XV 1100 from year of construction 90