Once a vehicle is out of warranty, I do as much myself as I can. Before that, I prefer the extra expense of the $tealership just to make any warranty issues smooth. It's the way I do it with cars and bikes both.
I brought in my 81 GPZ550 for the scheduled valve adjust. Put torque putty on one of the inside valve cover bolts, It was still intact when i picked the bike up. When I asked the service manager why he said it was a mix up and they would get it done right away. I bought a service manual and did my own from then on.
I try to do everything when I can. Some things don't make sense though, like my fairly new RAV4 that included 2 years of free oil changes, tire rotations, etc and since that ran out, they do an oil change/tire rotation for $25, I can't do it for that cheap!
I do everything on my bikes because they charge a lot for bike work and bikes are crazy easy to work on. On cars, I let the techs do the jobs I know are a pain in the butt and that they don't charge a lot for, like oil changes, tire rotations, and specific repairs that I know are painful and annoying.
I will do my own maintenance on this bike. I do need a service manual though to do the valve check and clean the centrifugal oil cleaner. What convinced me is all the valve checks (every 2500 miles with the first one at 500 miles) along with how easy it should be to maintain. You have to leave your bike there for it to cool off several hours for a valve check which means an extra trip for me to go to pick it up the next day. As far as doing my own maintenance affecting the warranty, I used to worry about that, but I won't with a Honda. Here's my plan. I will get the manual and do the first valve check at 500 miles as recommended. You could just get a manual and try the first service too. If you have trouble, you could still make that 500-mile apt. with the dealer.
Just keep your receipts for all the maintenance for warranty reasons. I like to do a lot of maintenance for myself, I feel like it's quality time spent. However, I do plan on shelling out what I need to for the first service as I've been told Honda has voided warranties for people not getting the first break-in service done.