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Anonymous Posted on Jun 12, 2012

Bmw f800st battery not charging

Fitted a new battery 1 month ago and yesterday bike stopped.checked charge rate and found no charging voltage.

5 Related Answers

Anonymous

  • 66 Answers
  • Posted on Aug 15, 2009

SOURCE: my battery is not charging when bike is running (gsxr 600 k6 )

When you put a voltmeter across the battery terminals, you should get >13.5V (typically) with the engine running. 
If less than this then your charging system is faulty and your battery will not charge. 
See this personally authored thread for a diagnostic guide on how to determine whether you have a problem with your stator or Rectifier/Regulator - inlcuding some cold resistance checks you can do on the R/R to determine if it is shorted. 
[url]http://www.triumphrat.net/speed-triple-forum/104504-charging-system-diagnostics-rectifier-regulator-upgrade.html[/url]
It was written initially for Triumphs, but applies to ANY 3-phase motorcycle charging system. 

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Anonymous

  • 2559 Answers
  • Posted on May 15, 2009

SOURCE: charging problem/no start 95 ninja zx6r

If lights dim when trying to start,Battery is to weak(may have 12 volts but not enough amps)
Bike dieing when removing power from jumper says the lighting coil on the stator plate is bad and this could also have killed the voltage regulator,Which would kill the battery by over charging it.
Hesitation and carbon smell could be from a non firing cylinder.

So,Take the battery and have it load tested (free at most auto part stores)
Check for power from the lighting coil on the stator
Replace the voltage regulator.


Please rate this fixya

Anonymous

  • 4565 Answers
  • Posted on Nov 25, 2009

SOURCE: BMW K1200 LT CHARGED BATTERY BUT WHEN FITTING POS

You have either a starter relay or the solenoid is stuck. Since I don't know what make the starter is, that's about all I can tell you. Try putiing the bike in high gear and rolling it back and forth and turn the engine just a bit. Sometimes that "unsticks" a starter drive gear. Might work. Good Luck!

Testimonial: "thanx it worked a treat"

agent91

Ned White

  • 2100 Answers
  • Posted on Mar 10, 2010

SOURCE: I have a 1979 XLH 1000 sportster and I having a

Did you charge the new battery? Did you check the new batteries electrolyte? I have seen many a new battery come off the shelf, dead! Get one of those floaty ball things and check the electrolytes in the battery, every cell, if one cell is dead, it is no good. The voltage sounds a little low but it should charge up. I don't know what size your battery is, but my old sportster had a car battery in it. Never had a problem. But never left the house without a screwdriver either.

oldmanewtoys

Rick Rife

  • 414 Answers
  • Posted on Mar 30, 2010

SOURCE: KAWASAKI VULCAN 1500 CHARGING PROBLEM

If you are getting 13volt output and it revs and gets 14.5volts it would appear to be charging. As you would get a drop in voltage if it were not. Stator is there for working. Check your voltage relay as it may be sticking which would cause it to run on system and not be sending charge to battery. Poor ground would also keep battery from being properly charged

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Measure the battery voltage with the engine running. It should show a charge, 13+ volts on the battery. If not fault find the charging system.
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The simplest things can cause the most trouble - I would start with a load test on the battery - may seem to be charged after using a battery charger, but can have plate connection problems causing failure under load.
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once replaced check bike charging with multimeter at battery,should make 13.5 - to 14.5 volts just above idle. if not will need to test stator and regulator.

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Overheated (3 hours gridlocked traffic), now pinging

put a multi meter on the battery, and check that the voltage when the bike is running is higher than when the bike is stopped, it may have spiked the regulator when jumped. I fit was jumped off a car the alternator tries to put out enough current to charge the car and this can stress the system
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My bike is a 2001 1100 v star that seems to be eating batteries all of a sudden. I was on a ride 2 moths ago and the bike started skipping under a load and when I stopped to check it out it shut off and...

My initial thought is you haved a faulty voltage regulator. You should be charging at about 15 volts, but when your battery gets charged, the voltage regulator should turn the charge system off.

Your battery is hot ... you are over charging.

Im sorry, I dont know where your regulator is located.

I hoped you find some value in this comment.

a
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Charging problem/no start 95 ninja zx6r

If lights dim when trying to start,Battery is to weak(may have 12 volts but not enough amps)
Bike dieing when removing power from jumper says the lighting coil on the stator plate is bad and this could also have killed the voltage regulator,Which would kill the battery by over charging it.
Hesitation and carbon smell could be from a non firing cylinder.

So,Take the battery and have it load tested (free at most auto part stores)
Check for power from the lighting coil on the stator
Replace the voltage regulator.


Please rate this fixya
1helpful
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Battery does not hold charge new battery fitted

Sounds like a charging issue. First check all wires and make sure they are clean and making good contact, then check for proper voltage at the battery. I ride a harly so I don't know the exact voltage to look for but it most likly is around 13V at the battery if it isn't you need to look at your voltage regulator and stator.
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VERY New F800ST won't start

may be because charge on bike's battery went down.
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Bad battery

Don't rely on on whether the bike will start at a gas station to determine if the charging system is working. Get the multimeter out and do a proper test. Should be getting about 14.5 volts @ around 3K RPM. It's too easy of a test to to just skip. If it is charging then start looking for something else. Was the new battery properly charged to begin with? Loose battery connection? I suppose the GPS could be too much but you said that it was dying last november, so I would suspect something else. P.S. you need a properly charged battery to get an accurate reading for the charging test.
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