On a harley davidson 2003 road king police FLHTP

SOURCE: horsepower

Stock it's about 64hp if it's a 1550cc. If its a 1450 (also stock) it's about 56hp.

SOURCE: batttery

remove seat and theres youre battery on any harley im aware of

SOURCE: shocks

The Road King shocks are air adjustable via an air valve located on the right side of the bike just above the rear tire. Your Harley Davidson owner's manual will tell you what the shocks should be pressurized to depending upon the load on your bike (for instance - if you'll be carrying a passenger - the pressure should be a bit higher than it would be if you were riding solo). Don't even attempt to read the pressure unless you have the specialized hand pump that is used to pressurize the shocks. You can purchase this from Harley Davidson or via a third party online. The valve is a typical bicycle / auto air valve - but ... DO NOT attempt to pressurize it with anything but the specialized hand pump. Using anything else will risk over pressurization of your shocks and that's not good. The shocks hold a very small volume of air at relatively low pressure levels - so the hand pump is a must have.

SOURCE: shift pattern

1st gear all the way down (toe shifter, not heel). Lift up N,2nd,3rd,4th,5th-6th(if applicable)

SOURCE: how to replace fuel filter on harley davidson 02

I am having problems viewing the reply but if you have a FLHRCI then to replace the fuel filter you will need to be prepared to put some time into it.
First remove the console off the fuel tank, one nut below speedo and the phillips screw lower close to the seat. You will have a disconnect on the top left side of the fuel tank to disconnect. Then disconnect the vent tube from the tank with a gentle pull & twisting motion. Now the fun part there are ten torx T20 screws you need to remove, but first you must go buy new ones along with the gasket and fuel filter kit. DO NOT reuse the screws. Now for whatever reason they call this piece a canopy, go figure. Once you have your parts go ahead and raise the canopy slightly and twist it to the left a little. Now this can be tricky because there is a spring loaded hng to work here, be care not to over stress any thing. Then you can begin to pull the canopy and components from the tank. You will be limited by the convoluted tubes (hose) attached as to how far you can raise the canopy, if you remove one be careful as where they attach is plastic and breaks....easily sometimes, then you need a $350 part.
Next read and look at the diagrams that come with your new fuel filter to install it. Once done carefully reverse the canopy removal process and tighten the canopy bolts in cross pattern o somewhere between 18-27 in-lbs. Hope this helps.

JP