This is a new Race Tech 6.4KG/mm rear shock spring that can be used on the following Dirt Bikes.
YZ125 80-82/84-14
 WR200 92-93
WR250 89-97
WR250F 01-09/11-14
YZ250 80-82/84-14
YZ250F 01-13
WR400F 98-00
YZ400F 98-99 
WR426F 01-02
YZ426F 00-02
YZ450F 2003
WR450F 03-09/2011
YZ490 82, 86-90
WR500 92-93
This is a spring that is designed for heavier riders. Around 230lbs on 450 models & around 260lbs on 250 models. Free shipping is in the U. S. only. Thanks

WE ARE DROPPING USPS & NOW SHIPPING WITH FEDEX OR UPS, UNFORTUNATLY THIS RAISED OUR PRICE BUT NOW YOU SHOULD ACTUALY GET YOUR PART.