2003 road king speedometer stopped working & the mileage isn't changing either

SOURCE: install a baron bullet tachometer on 2003 FLHRCI

remove big 1/2" nut below speedo, and + screw lower on tank dash, then lift intire dash and youre their. dose this help?

SOURCE: Oil change directions, 2003 Road King

The drain plug is on the left side of the oil reservoir pointing towards the front of the bike. The motor should be warm when you dump the oil and the o-ring should be replaced as an extra precaution (don't want to waste that new oil if you have a drip). When replacing the oil filter use a piece of tin foil to divert the oil to your waste pan.

SOURCE: link for down loading harley davidson road king repair manual

Not going to happen, copyright issues just like music. You may find it but.......

SOURCE: location of oil drain plug on a 1999 HD Road King Classic

The solutions are close, so I must assume they are HD Road King answers, just not a 1999 Road King. The drain plug is on the front (facing the forks) left side (clutch) of the oil pan. On the 1999 model the drain plug is a 3/4 inch bolt. After changing the oil, be sure to replace the O-ring. The O-ring is rubber and does not last more than a single oil change. HD charges a dollar for the O-ring, but better to replace it than to end up with your new oil all over the garage floor.

SOURCE: oil change procedure 2000 road king

the oil tank is on the bottom of the transmission in your RK. There are two drain plugs. The plug towards the front left of the pan is the oil drain plug. The other one is for the transmission.

Drain the oil, replace the filter, refill with three quarts of oil and you're ready to go. The dipstick has two marks on it. The upper mark is "FULL HOT", and the lower mark is "FULL COLD". Do not overfill.

Don't forget to service the transmission and the primary at their recommended intervals.

Good Luck
steve