# Your question: How do you check a motorcycle alternator?

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Put your multimeter in AC mode. You now can test the voltage between the terminals of the stator coil at 3,000 rpm. Depending on your motorcycle, you should get a reading of anywhere between 20 and 50 volts.

## How do I know if my motorcycle alternator is working?

Another way to check if the alternator is working properly is to simply touch the + and – pins of the tester to the + and – terminals of the battery while the bike is running. Multimeter should be set to DC voltage with the decimal point positioned as so: 00.0.

## How do I know if my stator is bad?

The stator coil generates the power for the spark plug and other accessories on small engines Without a stator there would be no spark at all, meaning the engine won’t run. While a stator is dying, it can produce a weak spark, causing the engine to miss or run poorly. Symptoms are often worsened as the engine warms up.

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## Will a motorcycle run with a bad battery?

Yes a bad battery can make motorcycles not run well, shorted cells in the battery will cause the voltage coming from the alternator to get shunted to ground, eventually as more cells short out this will drop the voltage low enough that it will affect the fuel pump and the ignition coils.

## Will a motorcycle run with a bad stator?

If the stator is bad, the bike won’t run at all. The stator generates energy for spark. Assuming the air cleaner is clean and other general maintenance has been performed, if the bike won’t kick start but runs as you state, the problem is probably either the spark plug and/or fuel delivery.

## How many volts should motorcycle battery have?

A healthy 12 volt motorcycle battery should maintain a range from 9.5 – 10.5 volts under the load for a good 30 seconds straight. If the battery begins to hold and then steadily drops in voltage, there is a problem.

## How many volts should a stator put out?

For example a 32-amp stator should put out 18 volts AC (VAC) per each 1000-RPM. At 2000 it should be 36 VAC (18×2). At 3000 RPM it should be 54 VAC (18 X 3). Each system has a certain voltage it should produce per 1000 RPM.

## What causes a motorcycle battery to overcharge?

Battery will overcharge if your voltage regulator is not working properly. If you are using a battery that is NOT sized properly for your bike (aka too small of a battery). If the battery has been discharged far too low and has damage to one or more of its cells.

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## How do I know if my motorcycle battery is bad?

Signs of a bad battery include broken terminals, a crack or bulge in the plastic casing, as well as any leaking fluid or discoloration. Sometimes, battery terminals can become corroded.

## Does a motorcycle battery charge while idling?

Technically, a motorcycle battery does charge while the motorcycle is idling though it does not provide as much amperage as when the motorcycle is at higher speeds. During a normal ride, a motorcycle provides about 13, 14, or 15 amps while idling only provides less than 1 amp.

## What are the symptoms of a bad voltage regulator on a motorcycle?

After all, the voltage regulator is supposed to keep the power flowing to the lights, so it’s no surprise that those lights don’t work right anymore once this part goes bad. This issue can extend to your headlights, dashboard lights and even your sound system.

## What causes a stator to fail?

There are a few things that may cause a stator to fail. Too heavy of a load when operating accessories (winch,heated grips,headlights, etc). If working several of these items at one time (plowing/pulling/possibly stuck at night) you would overload the system. This could cause either the stator or rectifier to fry.

## Will a bad stator drain a battery?

If the stator doesn’t provide enough power, the battery will begin to drain. … Readings over 1.5 Ohms are an indication that the stator is faulty. Next, check to make sure nothing is going to ground by connecting the red lead to the connector and the black lead to the negative terminal of the battery.

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## Is a stator the same as an alternator?

Stators are inside the engine case. An automotive style alternator is a fully self-contained, externally mounted unit that creates DC current. Another difference between stators and automotive style alternators is the type of magnet uses. Stators use a permanent magnet, and automotive alternators use an electro-magnet.