I need to rebuild the rear shock on my 09 450. With a job in road construction, and without any parts ordered yet ..... and a 13 year old son I ride with, I don't want the down time. I want to pick up a used shock on ebay cheap to use until I can get mine going again. Will any 426/450 shock work up until 09? Also, what fluid do I use in the rear shock? I can't seem to find out much about what to use.