Hello everyone I bought this similar shock on Ebay for my sons crf 50 minus the reservoir. It came with a 350 lb/in spring. When we went to setup the sag and free sag we noticed that the springs was too stiff for my son. He is 155 lb teenager. So be aware of this. The 250 lb/in spring this one comes with should be good if you weigh around 160lbs or less. Not sure if you can purchase a lighter spring for the fast ace shocks or not. But it would be nice if that was a choice you could choose. So anyone could setup the suspension correct. Hope this was helpful.

P.S. if anyone knows of a place to purchase a spring for these shock please note it on a blog on this site or another site

Thanks