QUOTE(Dtrain @ Dec 6 2006, 12:33 PM)

The spring rate is #100lbs per 1 inch. part number is 7041550-133.
7041550-133 $50US list. Well that spring has a rate of 120 lbs per inch according to the Polaris parts database, and the spring table in the MY07 service manual on page 8.8 says 120 lbs per inch. This spring is used under FST's and some IQ Touring and Classics, MY07 600 LX Cleanfire
7041576-067 is the 100 lbs per inch stock black MY06 600 HO spring. Used in many Fusions and IQ sleds up to and including the MY07 700 Dragon 121.
7041576-133 is the 100 lbs per inch white spring. $30.44US list. Used on the MY07 600 IQ Cleanfire.
This is what I would recommend unless you want a stiffer spring.