How do you get to the battery of 2008 Road King?

SOURCE: My 2008 road king has an annoying whine when I

Your transmission has a straight cut 5th gear and not a helical cut 5th gear.
HD fixed this whine with the 2010 touring models.

SOURCE: How do you change the brakes on a 2008 road king

There are two long bolts (Torqx type bolts) that hold the rear caliper into it's bracket, Remove the two bolts and lift the caliper off the rear caliper bracket. Notice how the pads and the "anti-rattle clips" are positioned in the caliper bracket. Replace the pads and anti-rattle clips with new ones.

Now you'll need to get the piston pressed back into the caliper. Use a large C-clamp or a pair of slip joint pliers to do this with. Use a rag or something to keep from scratching your paint or scoring the piston. Once the piston is all the way back in it's bore, replace the caliper in it's bracket being careful not to disturn the pads. Pump the rear brake pedal a few times slowly until you build up pressure. Test the brakes before riding the bike. An improperly performed brake job can cause serious injury or death. Make sure everything is right before riding the bike.

SOURCE: How many ounces does a 2008 FLHR Harley Davidson Road King hold?

Well i blow about 20 ounces of fluid and u ?
I guess you are talking about fork oil? it's measured!!!

SOURCE: clutch chattering while releasing clutch on 2008

This is indeed an unusual problem for such a late model bike. The old Shovelheads used to do this from time to time but Harley quit building them in 1984. I've never had an Evo or Twin Cam bike come in with this problem.

However, what we used to do with the Shovelhead clutches is to take the clutch apart, clean the disc off with gasoline, and lightly sand the disc. The disc would get a glaze on them and gasoline was the only thing that would take it off. You had to be very careful due to the volatility of the gasoline.

Doing this may or may not be within your capabilities to repair. It would require that you remove the outer primary cover and disassemble the clutch assembly. You could try that if you wish but like I said earlier, this is a problem that I've never run across since the introduction of the Evo engine and the clutch assembly they employed after that. Make sure you check the tension on the primary chain and the oil level in the primary case.

Good Luck
Steve

SOURCE: 2008 HD Road King Classic: Running lights work,

Do you have a security system on this bike? If so, has the bike been hit or laid down? If not---

Check fuses and circuit breakers to ensure they are good.