What year of ds650 are you supposed to bleed the air out? Also, what is the proper way of bleeding it? Do you drain oil then remove filter then bleed? or what?

 

all DS's have the bleed screw, but few past the year '01 need to be blead. from '01 on the oil line has a vent in it for self priming.
typically only the '00 year needs blead after most oil changes.

the procedure is to drain the oil tank, drain the crankcase, remove the filter cover and old filter, fill the oil tank, open bleed screw til oil runs out, tighten bleed screw, install new filter and cover. run engine and insure the red light on the dash goes out right away, if the red light stays on this indicates no oil pressure due to insufficient bleeding of air out of the oil supply line, so bleed again.