I need to know the correct amount and weight oil for a 2008 KLR650. I was swapping the rear spring, and saw the air valve on the top of the shock, I didn't know at the time that is was for filling the shock with nitrogen and thought maybe it was a modified shock and used for air pressure adjustment, so I pushed it and gas came out, followed by spewing oil. So I need to flush the oil and refill it with the proper amount then have it filled with the nitrogen. The oil did look VERY dark, 10,000 miles are on the shock. I tryed seaching and found the correct volume for a <07 klr but just says fill with 'shock oil'. Also the dampening adjustment at the bottom of the shock, what I read it should have 4 positions, did it get upgraded to step-less adjustment for 08? Thanks!