Greasing the stearing stem is easy, it takes longer to take it apart then to actually grease it. I've done it on all my bikes when I get them, new or used. Take off the front wheel, disconnect the brake caliper, take off the fender, then pull off the forks, one at a time. Be careful when you loosen the last pinch bolt on the forks because it may slip through and hit the ground. Take off the bars, but just lay them backward or forward, to get them out of the way. No need to take off the clutch or throttle goodies. Loosen the top nut that holds the upper clamp. Take it off then loosen the notched nut that holds the lower clamp assembly. Be careful that it also dosen't fall through out the bottom, it can happen. I clean the entire bearing, upper and lower, and the chase for each. Make sure they are clean, no dirt or grime, then regrease using some good water proof stuff, white, etc... Put it back together and be carefull about how tight you apply the first notched nut. it's just beyond hand tight, needs to have some movement and not stick. Put the upper clamp on, checking the movement after you torque it down to specs, sometimes it tightens the lower nut causing it to tighten. Oh, before you tighten the top nut, insert the forks so the clamps line up. Torque them to specs, very important so as to not pinch the inside of the fork tube with too much muscle on the pinch bolts! Put it back together, good to go. Follow the torque specs on those bolts, it's important.
If you've already done the rear linkage, being sure to attend to the swing arm bolt, that should cover it. Maybe go through and spray some anti seize on your spokes, helps down the road to stop sticking. Retighten them on a regular basis too.