yfz 450 rear shock owners

I have a stock (I think) Blaster rear shock and I have the preload as soft as it goes. I weigh 190 I think it could still be softer, but i don't do huge air jumps, just lil' hops for my blasty. It may be not a stock shock. Heck I just found out it had banshee rear wheels and hubs. How can I tell if my shock is stock?> Thanks!!
 
they make special wrenches for those.. not sure if you know what coilovers are but its the same way. look for a set of coil over wrenches
 
It isn't too bad to do.I actually sold natdog this shock,all he had to do was bolt it on.When you go to do it let me know.I took pics and will give you all the details to make it work with stock bolts.My plans after doing it was to post a how to,I just have not had the time but I will eventually.Takes about 30-60 mins to do it with the correct tools.
 
its is super soft, also i just mounted 22 inch tires on the front and it raised the front up, doesnt make the back look like it sits too high now