[email protected] kicks back hot or cold starter turns over slow at times installed new battery because it was orginal o6 1200 sportster new battery tested good fully charged connections seem good

The battery needs to be replaced. After the first start in the morning the battery gets charged and the engine is also "hot" making it easier for the starter motor to turn it over. Therefor less current is drawn from the battery and you get a start every time. In the morning the engine is cold making it difficult to turn. The battery rested the night loosing some charge and is also cold which affects the current it can deliver at that stage. With the cold engine it is not able to turn it fast enough to get it started. A new battery will solve your problem.

Sometimes battery cables can short the circuit; try getting them away from any metal or each other.

When was the last time you changed your Oil? Friction causes this or a weak starter

happened to me with the kia sportage. slow to start when hot.

check and clean your battery connections/terminals. some dirt/corrosion at the battery terminals dries up when hot, providing some resistance to the wire connections and slows down the turn over of your starter. clean this up by removing terminals, and cleaning it with sandpaper and water.

check/restart engine particularly when hot. if this does not work, have your starter bushings checked. these bushings when hot has a lot of friction slowing the starter turn over. sometimes the bushings are worn out.

I had the same problem with mine. The cable was so hot that I couldn't touch it. I replaced all of the battery and starter cables with heavier gauge wires. Now my mower starts easily, whether hot or cold.

The hissing sound that you're hearing may be crankcase pressure being bled off or compression bleeding off through a valve that is not completely closed. The delay on the engine turning over could be caused by residual compression, a slow starter relay, or a slow starter solenoid. How old is the battery. Heat, vibration, and age is what kills a battery, not mileage.

Good Luck
Steve

There is a test you can run on the starter but you need special ewuiptment to perform this test. You probably can take the starter out and take it to a local shop and they can test it. It sounds like the starter is dragging and probably needs to be rebuilt.

There's a quick test to see if your starter is the problem or something else is causing it. First, it's very important that your bike is in neutral to do this test. If not, the bike is going to lurch forward.

Remove the rubber cover over the end of your starter solenoid. Use and old screwdriver or something and short between the small terminal and the large terminal that the cable from your battery connects to. The starter should kick in and turn the engine over. If it does, the starter is good and your problem is electrical.

If it's electical, there are two places it could be. Underneath the battery tray, there is a starter relay. Again, the bike must be in neutral. Turn the ignition switch on and while holding the starter relay, push the starter button. Do you feel a click? If so, this confirms the wiring between the relay and start button is alright.

Now, you'll need a test light or a volt meter for the next check. On the small terminal of the starter solenoid. connect the test light or the Positive lead of a volt meter, the negative lead of the meter to a good ground. Put the meter function switch in DC volts. 20 volt range. Turn on the ignition and press the starter button. The test light should light up or the meter should read battery voltage. If it does not, your starter relay is bad. If it does, your solenoid needs a repair kit installed in it.

A repair kit is available from aftermarket sources. Most any bike shop can order them for you and they aren't expensive. Disconnect the battery and all the wires on the end on the solenoid. Remove the nuts that were under the wires on all three terminals. Take the two small screws out of either side of the solenoid end cap and remove the cap. Replace the cap with the new parts and the new cap. Be careful when tightening the two screws and the nuts on the terminals as the bakelite end cap cracks very easily. Just snug on the nuts and screws. Reconnect the wires and your starter should work.

If not, let me know.

Good Luck
steve

I would check your starter switch on your handle bars, some times the switch can go bad, or the wiring attached can be loose. I actually had one smoke before, then it would not start.

Sounds like a timing issue. If you have points set them to .018 and then static time the engine.
Hope you have that Shovelhead going by now.