I have a 2007 road king that was starting and running perfrectly. I stopped and it would not start. Acted like the battery was low.i checked with a vlot /ohm meter. It was good. I tried to jump it and it juct clicks once. I checked the terminal and the are not coroded.

Duplicate question already answered

Maybe. It had nothing to do with the battery The problem just acured at the same time? Try tracing the wires then try replace the gauge then might be the transmission?

You didn't describe the "click"

A series of rapid clicks means a low battery, or a bad (usually ground) connection, like if you crunched/abraded a wire along the lower frame when you drive over a curb.

A single, loud click indicates its a bad starter relay, about a $12 part:

http://www.ebay.com/itm/Starter-Brake-Relay-Switch-Harley-ROAD-KING-1991-2011-repl-OEM-31504-91A-/390652043658?pt=Motorcycles_Parts_Accessories&fits=Year%3A2006%7CModel%3ARoad+King%7CMake%3AHarley-Davidson&hash=item5af4ad218a&vxp=mtr

drain the gas and replace with new, do an oil change and check the levels of the primary case and gear box. check your battery hopefully it was disconnected and has been on a battery tender or you have a new one. check the operation of the clutch cable and brakes and lube them if necessary. check tires for cracking and pressure. Some of this may not be necessary if the bike was properly stored and maintained.

I'd guess either the "Run/Start" switch in in the "stop" position, (don't laugh, i've done it myself), you have a security system problem, or your starter relay is bad. The relay is a one cube looking device that acts a control circuitry for your starter. Usually they are under the seat but Harley has started moving things around so much lately that I can't keep up with them. It is going to be back near your starter somewhere. When you find it, turn the switch on and depress the start button. You should feel a noticable "click" if you are holding onto the relay. Now, look at the end of your starter from the right side of the bike. You'll see the end plate (pentagon shaped plate with three screws) with a small wire plugged into a connector at the top of the plate. Disconnect the wire and stick a test light or a volt meter into the wire side of the plug, not the starter side. Turn on the switch and press the start button. The test light should light up or the meter should show battery voltage. If it doesn't, you relay could be bad. Almost any auto parts store should have one.

Ride Safe
Steve

I would suspect a coil issue. A KV test can be performed to see if its weak.

A harley AGM battery are usaully good for three to five years the best thing to do is have the battery load tested.Now as far as your problem now depending on the batterys state of charge the solenoid will click or not.Because you store it alot you should keep a trickle charger on the battery

Of the choice you list, I use the recommended 20W 50. FOr my 2000 Road King, I use Mobil 1 V twin oil.

Your heading for Stator problems 'ol son,...........
Before long, the engine is going to start coughing & spluttering, eventually it will stop. Let it sit awhile, if the battery in good shape, it might start again, but it won't last long before it stops again. Last time it happened to me, I was on an 800klm long highway, just on dusk, turned on the lights, (custom bike, actually has a headlight switch) got about 2ks & it died. Ever spent the night, freezing cold on a highway no one uses?
Get your charging system checked A.S.A.P!