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  #1  
Old 03-25-2018, 06:40 AM
icecolder icecolder is offline
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Battery charging problem... i guess..

Hi.
Having problem with electricity and even do not know what to blame
When bike started it shows voltage on battery 14.2 V. Pretty normal. But while riding on high rpm it drains out battery nearly completed and if to continue to drive it simply cuts off everything and stops the engine. Bike can be restarted in 20 min or so, but gives no reaction if trying to restart immediately. Yesterday charged battery fully. Been driving for a while on a high rpm and at some point battery error popped up for a few seconds, than dissapeared. Also idle became very low- at about 800.
Charged battery again and connected voltmeter to it and took it for a ride. It always shows 14.2 V, but when put in neutral voltage drops a little and in a couple of secnds comes back to 14.2 V. BUT each time that drop is bigger and bigger.

Looks like bike charges battery while bike is running on low rpm or idle but drains out battery completely when running on high rpm.

I guess this is not voltage regulator as it holds 14.2V. So what else can be there? Brushes of the alternator? Stator of the alternator? Rectifier of the alternator? How to identify which one of thous can it be???

Also my bike has DENSO 50A alternator, but i noticed later models had update and has BOSCH 55A alternators. Would it be possible to upgrade to a more powerful unit from 50A to 55A? Would bike work ok?
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  #2  
Old 03-25-2018, 06:52 AM
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Re: Battery charging problem... i guess..

Do a forum search on 'hot start issues'. That may answer your question
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Old 03-25-2018, 08:23 AM
paulmogs paulmogs is offline
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Re: Battery charging problem... i guess..

How old is the battery?

Have it tested by a proper battery shop/dealer.
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Old 03-25-2018, 09:15 AM
icecolder icecolder is offline
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Re: Battery charging problem... i guess..

Battery is 6 month old, it is tested, also my previous battery was ok but i changed it just in case, also changed battery for a day with a friend, he was running with my battery ok all day and i discharged his completely. His bike was running ok on both batteries. So it is deffinatelly not a battery.
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Old 03-25-2018, 09:25 AM
paulmogs paulmogs is offline
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Re: Battery charging problem... i guess..

Probably alternator then. Pretty sure Reg/Rec is internal of alternator.
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Old 03-25-2018, 09:49 AM
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Re: Battery charging problem... i guess..

Also would it be possible to upgrade from "denso 50A" to a later unit "bosch 55A" ?
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Old 03-25-2018, 11:14 AM
knutk knutk is offline
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Re: Battery charging problem... i guess..

The generator light comes on both for charging at a too high voltage and if charging voltage is too low. It's an charge indicator, not an old-fashioned charging bulb.

If charging voltage is ok at startup, chances are that the regulator is ok.
The rectifier part of the regulator my have lost one fase. This will give ample supply at low loads. But again, right after startup is a hi load condition, so if one of the rectifier bridges are out, I would expect the initial charging voltage to be a bit lower than 14,2.
Given that the rotor and stator are ok, (which should not be taken for granted, there may be a broken wire that will give intermittent function).

However, given the provided information, my money goes on the brushes, either to be worn out ore that one brush is slightly stuck due to durt-buildup).

But whatever reason the fault may be, bring along og install a temporary voltmeter. If the voltage at some point is reduced below 13,5V or exceeds 14,5, the generator needs to be pulled out in order to check and repair.
If the voltage is stable around 14V +/- during the entire ride, I would suspect the battery, even if it's fairly new.

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Old 03-25-2018, 12:11 PM
icecolder icecolder is offline
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Re: Battery charging problem... i guess..

I done a test and add a voltmeter on a battery and took it for a ride. Described that in a first post.
While on a load or idle voltage is always 14.2 V, but once turning on a turn signal or a heated grips voltage drops for a few seconds to ~13.8v. BUT when riding on high rpm it shows 14.2 as said, and once clutch is pulled, throtle released, the voltage suddenly drops to 13.5V or so for a couple of seconds and comes back to 14.2V after that. And the more i ride the bigger is the voltage drop on each clutch pull and throtle release. And it comes to the point where voltage drops as low as 11v on clutch release, the idle rpm drops down to 800 (which is to low for idle), the battery error pops up for a second on a screen, than voltage increases back to 14.2 and error goes away, rpm rises to 1k (which is still to low), light also becomes weaker and weaker..
Simply looks like bike takes electricity from battery but not charging it and runs more and more poor while battery discharges completely and bike shuts down completely..
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Old 03-25-2018, 12:38 PM
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Re: Battery charging problem... i guess..

Quote:
Originally Posted by icecolder
I done a test and add a voltmeter on a battery and took it for a ride. Described that in a first post.
While on a load or idle voltage is always 14.2 V, but once turning on a turn signal or a heated grips voltage drops for a few seconds to ~13.8v. BUT when riding on high rpm it shows 14.2 as said, and once clutch is pulled, throtle released, the voltage suddenly drops to 13.5V or so for a couple of seconds and comes back to 14.2V after that. And the more i ride the bigger is the voltage drop on each clutch pull and throtle release. And it comes to the point where voltage drops as low as 11v on clutch release, the idle rpm drops down to 800 (which is to low for idle), the battery error pops up for a second on a screen, than voltage increases back to 14.2 and error goes away, rpm rises to 1k (which is still to low), light also becomes weaker and weaker..
Simply looks like bike takes electricity from battery but not charging it and runs more and more poor while battery discharges completely and bike shuts down completely..

Well, then you know that it's an alternator issue.

BMW does not supply single spareparts for the alternator. You either replace it or have it rebuilt by a specialist shop.
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Old 03-25-2018, 12:54 PM
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Re: Battery charging problem... i guess..

Quote:
Originally Posted by icecolder
Also would it be possible to upgrade from "denso 50A" to a later unit "bosch 55A" ?

By looking at RealOEM, it appears that it's Denso that matters. For this engine there is the 50A for 'R and 'S and 70A for the 'GT.
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Old 03-25-2018, 11:55 PM
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Re: Battery charging problem... i guess..

It sure looks like the alternator, but do not discount a short somewhere. I think you also need to put a current meter in line and see what is going on. That will not be easy. A calibrated shunt is needed. Something like this:
https://www.ebay.com/itm/US-Stock-DC...8AAOSw3v5YnssY
You will need to see amperage flow near Alternator max output to see the voltage drops you have been reading if your batteries are normal.
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Old 03-26-2018, 09:39 AM
icecolder icecolder is offline
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Re: Battery charging problem... i guess..

Decided to pull out generator and to drop it in repair shop for testing. Will see what they are say... Hope the repair would not cost a lot and will be possible to rebuild if needed, as new alternator price from bmw is... omg...
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Old 03-26-2018, 09:45 AM
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Re: Battery charging problem... i guess..

Sure does sound like the hot start issue. If waiting after 20 minutes and the bike starts again, doesn't sound like the battery to me.
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Old 03-26-2018, 10:50 AM
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Re: Battery charging problem... i guess..

I doubt the hot start issue, but will come back to this if generator will appear ok.

Ok, just pulled out generator. Was not so hard. Tomorrow gonna bring it to repair shop. Want to know as much as possible to avoid unnecessary parts changing like sometimes thous shops wants to do, so is there any tests i could run with it right now at home while it is on my table?
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Old 03-26-2018, 12:10 PM
ChrisCannin ChrisCannin is offline
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Re: Battery charging problem... i guess..

I put a post up last year about similar on my R I wasn’t interested in repairing it even though it had only done 12000 miles while looking for options I also found the higher rate Bosch but it was only available in the States and with import duty was silly money found a shop soiled brand new one on German eBay for peanuts and it’s working fine.

I’d suggest doing the plastic right angled male fuel connector as well assuming you haven’t already done it.
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Old 03-26-2018, 06:41 PM
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Re: Battery charging problem... i guess..

Found this video about testing:
https://www.youtube.com/watch?v=at_R7sENE0s

Done everything as suggested. Found out that all mechanical parts are completely ok and nearly no wear even on brushes or slipper rings.
Could not test voltage regulator because do not have such a fancy equipment as that guy. So, now voltage regulator is the last suspect. Will bring whole generator to repair shop tomorrow for a test and will find out.
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  #17  
Old 03-27-2018, 07:44 AM
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Re: Battery charging problem... i guess..

Apparently after testing the generator is completely ok.. Dont know what to do next. Was advised to clean all possible contacts, especially on a battery wires or change the connectors on battery wires endings. Will try to do that. Also found on a forums the starter relay can be bad- but this looks somehow unlikely..

Also checked the ABS unit fluid level as im already under the tank. I found the fluid level is somewhere much more below the white plastic- should i top it up or leave as is??? Because in front and rear brake canisters the fluid level is at the max, but somewhere on instructions about abs unit fluid replacement found that fluid level in abs unit should reach white plastics of the filling hole..
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Old 03-27-2018, 09:40 AM
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Re: Battery charging problem... i guess..

Let us know when you try the hot start fix. If you are replacing the cable terminals, why not upgrade to with the hot start kit. Basically, it is a thicker gauge cable.
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Old 03-27-2018, 01:03 PM
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Re: Battery charging problem... i guess..

Is your bike a servo brake K12? If so you have four separate not connected brake fluid systems.
Something is going on with your bike electrically. Now I want to say not to discount completely the thin chance all batteries were on their way out. I once was working on a complicated DC motor drive system and three controllers in a row were faulty and I was going crazy looking for the problem source. Shite happens.
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Old 03-27-2018, 02:11 PM
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Re: Battery charging problem... i guess..

Today will place generator back, and tomorrow will change connectors. I would not like to change battery wires (hot start kit) as it cost over 100 euro for 2 wires and they can not be just bolted on- as i understand it is massive work to change them from the roots and result would be nearly the same as to change connectors only for a few cents.. Will post a result later.
By the way, anyone knows location of negative wire connected to frame??? Would like to check that spot also.
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Old 03-27-2018, 02:40 PM
knutk knutk is offline
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Re: Battery charging problem... i guess..

Quote:
Originally Posted by icecolder
Apparently after testing the generator is completely ok.. Dont know what to do next. Was advised to clean all possible contacts, especially on a battery wires or change the connectors on battery wires endings. Will try to do that. Also found on a forums the starter relay can be bad- but this looks somehow unlikely..

Also checked the ABS unit fluid level as im already under the tank. I found the fluid level is somewhere much more below the white plastic- should i top it up or leave as is??? Because in front and rear brake canisters the fluid level is at the max, but somewhere on instructions about abs unit fluid replacement found that fluid level in abs unit should reach white plastics of the filling hole..

Internet fault - findings has it's limitations.

If I understand correctly:
- When starting from cold, the alternator charges and delivers normal voltage.
- While riding the the alternator performance gradually deminish to a point where the bike stops. At this point the alternator is not charging, and the battery is drained to a point where it needs to be recharged.
- After recharging the battery it's the same story again.
------------

The alternator is grounded to the engine, and the heavy wire is routed directly to the battery, with no connectors inbetween. The two thinner wires are routed directly to the ZFE.

If the bike is running fine until it lacks electricity, there is not many options for failure.

Lack of charge to the battery is either the alternator or the cable leading from the alternator to the battery.
The cables function can easily be checked by comparing the voltage at both end of the cable, even at the heaviest load the difference between the ends (votage drop) should be less than 0.5V.

I understand the alternator has been checked in a bench, but for how long, and how much load has it been exposed to, and for how long. The reason for my question is that if there is a mechanical failure such as a broken wire inside this may work fine until the alternator is warmed up, same goes for the diode-bridge.
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Old 03-27-2018, 03:20 PM
icecolder icecolder is offline
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Re: Battery charging problem... i guess..

Yes, knutk, it is correct.
Alternator tested on a bench, test took might be 5 mins..

Now the friend visited. We just have tested the connectors. Actually the wires.
-From negative battery connection to any place of the frame/engine it shows 0-0.1 ohm.
-From positive battery connection to generators connection it shows 0-0.1 ohm.
-From positive battery connection to starter connection it shows 0-0.1 ohm.

Sometimes tester shows 0, sometimes 0.1, but this is i believe because this is cheap tester, not some kind fancy super accurate one. So connectors and wires seems to be ok and not creating any resistance there.

So whats left????
-starter relay, as guys who has hot start issue says??? But bike cranks ok hot or cold.
-some kind of electric block drains the energy massively while on the go??
-as knutk said- might be alternators voltage regulator, as it been tested cold and short time and might be it is really starts to act strange when gets hot???

Anything else???

Forgot to note- bike has PCV and AUTOTUNE module installed. Im sure autotune is ok as i had it removed and put back few times already and had same issue without it. Can it be power commander???
Also bike has led backlight and led turn signals. Both are connected through led blocks. Can thous drain power??

Also im having strange abs partly malfunction usually- when starting the bike and sitting in a place for a few seconds abs light starts blink together with yellow triangle. BUT it i turn the engine on and start moving immediately than abs light flashes few times as normal and dissappears as it should be doing normally. I been riding like this all last season. Can it be ABS unit draining power so much on high rpm that generator has not enough power to charge battery???

Im out of ideas..
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Old 03-27-2018, 03:50 PM
icecolder icecolder is offline
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Re: Battery charging problem... i guess..

Also side question. I have 4 similar connectors on harness- marked them on photo. They are all similar. But i have one which does not goes anywhere??? how this can be?? I checked everything centmetre by centimetre and could not find where it should go. Can it be one unused connector there??? 2 for airbox, one for oil presure sensor and one spare???
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Old 03-27-2018, 03:56 PM
knutk knutk is offline
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Re: Battery charging problem... i guess..

You say the alternator was tested for 5 mins.
When you start to ride from cold engine with a fully charged battery, how long does it take before the problems start? My point is, if there is a malfunction that turns up when generator is warmed up, a 5 min test will not be enough. A 1 hour run with the alternator carrying a fair load that gets the generator truly warmed up would be more proper in this case.

As for other equipment draining more than the alternator will deliver:
Remember that even if there is no fusebox in the bike, all circuits are protected, thus a shorted circuit will be shut down. Also if there is a short that drains more than this generator can deliver, it's bound to become VERY hot. A fullly working generator will deliver 50A = 700W, and in order to not only keep status quo but in fact drain the battery this means even more.
Not very likely.

My money is still on the alternator that fails when it gets warmed up.
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Old 03-27-2018, 04:05 PM
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Re: Battery charging problem... i guess..

Im having problems with discharging while running hard only- from mid to high rpm. Then it drains battery completely and quite quickly. For example traveling on steady speed of ~200 km/h drains battery flat after about 30 mins.

I do not have any problems in low-mid range rpm (under 6k)- it works just fine there and can ride all day every day and bike keeps battery fully charged in that range.
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Old 03-27-2018, 04:29 PM
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Re: Battery charging problem... i guess..

Quote:
Originally Posted by icecolder
Also side question. I have 4 similar connectors on harness- marked them on photo. They are all similar. But i have one which does not goes anywhere??? how this can be?? I checked everything centmetre by centimetre and could not find where it should go. Can it be one unused connector there??? 2 for airbox, one for oil presure sensor and one spare???

Does it look like its has not been used before, i.e dust and dirt inside, or are all the contacts fresh and clean?

From the position in the harness it appears to be meant to go to the rear of the cylinders, where the throttle body is.

Perhaps counting the leads to the plug might give you a clue:
- 4 leads:
-- Idle speed actator
-- Throttle valve end position

- 3 leads:
-- Throttle position sensor

- 2 leads in this region:
-- Left knock sensor
-- Right knock sensor
-- Secondary air valve
-- Crankshaft sensor
-- Camshaft sensor

May be not all of these are used on all bikes, depending on national pollution regulations.
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Old 03-27-2018, 04:42 PM
knutk knutk is offline
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Re: Battery charging problem... i guess..

Quote:
Originally Posted by icecolder
Im having problems with discharging while running hard only- from mid to high rpm. Then it drains battery completely and quite quickly. For example traveling on steady speed of ~200 km/h drains battery flat after about 30 mins.

I do not have any problems in low-mid range rpm (under 6k)- it works just fine there and can ride all day every day and bike keeps battery fully charged in that range.

This might indicate that heat has something to do with it. Different materials expand differently, and a bad connection may work when cold and open up when warmed, either a solderjoint, a wire or an electronic component.

As a rule of thumb:
If its an electronic part that works intermittent due to fault inside, the malfunction follows a very predictable pattern.
If the problem occures random based on external conditions it's more likely to be a mechanical fault such as bad solder joint, broken wire, sticky contact etc.
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Old 03-27-2018, 04:55 PM
knutk knutk is offline
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Re: Battery charging problem... i guess..

Also, a weak spring on one of the brushes might do this. Low rpm = working contact, High rpm = brush struggles to make contact. The brush/es might be worn or just sticky due to dust buildup.
I would not be surprised if opening up the alternator might reveal the problem.
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Old 03-27-2018, 05:52 PM
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Re: Battery charging problem... i guess..

Already had it open. Inside everything is super nice. Brushes are still nearly new. My bike has low miles- 50k KM only, so it can not be worn anyway. Tested also rectifier bridge diodes- all good, working one direction, all show nearly the same reading of 5.9. Stator is good too, no voltage leaks between circuits and body, also every circuit shows nearly zero resistance. Rotor has no power leaks, slip rings are nearly new and in top condition. The only part i could not test by myself was voltage regulator. So brought all alternator to the workshop to put it on a bench test and it was ok (for a 5 mins).

Thinking about calling to shop tomorrow and ask if they can test the voltage regulator alone and how much cost the new one. Will see what they say. If that one is not very expensive than i guess i need to change it- might be i will be lucky with this guess as no other options i can see there.
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Old 03-27-2018, 06:40 PM
knutk knutk is offline
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Re: Battery charging problem... i guess..

Quote:
Originally Posted by icecolder
Already had it open. Inside everything is super nice. Brushes are still nearly new. My bike has low miles- 50k KM only, so it can not be worn anyway. Tested also rectifier bridge diodes- all good, working one direction, all show nearly the same reading of 5.9. Stator is good too, no voltage leaks between circuits and body, also every circuit shows nearly zero resistance. Rotor has no power leaks, slip rings are nearly new and in top condition. The only part i could not test by myself was voltage regulator. So brought all alternator to the workshop to put it on a bench test and it was ok (for a 5 mins).

Thinking about calling to shop tomorrow and ask if they can test the voltage regulator alone and how much cost the new one. Will see what they say. If that one is not very expensive than i guess i need to change it- might be i will be lucky with this guess as no other options i can see there.

This is obviously a tricky one....
Keep in mind that the alternator appears to be working when "cold" and the problem occures at higher rpms and the alternator gets warm or spins fast, thus a benchtest of a cold unit will not paint the complete picture...
I understand that all cables outside of alternator allready have been checked, and this includes the ground connection.

If at all possible the best thing would be to manage to get the alternator into "failure mode" and then check out the parameters.
This is not an easy task. Perhaps it's time to hook up testcables on a temporarly permanent basis (does that make sense?) in such a way that you are able to measure the voltages at different ponts while the battery is not taking charge.
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Old 03-28-2018, 04:35 AM
ChrisCannin ChrisCannin is offline
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Re: Battery charging problem... i guess..

If you do a search and looked at various forums over the years the alternator going belly up is not a common thing I put all my efforts into acquiring an alternative at the right money the original went in the bin.
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Old 03-28-2018, 08:01 AM
paulmogs paulmogs is offline
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Re: Battery charging problem... i guess..

Have to agree with this. Heat can change a few variables.

Quote:
Originally Posted by knutk
I understand the alternator has been checked in a bench, but for how long, and how much load has it been exposed to, and for how long. The reason for my question is that if there is a mechanical failure such as a broken wire inside this may work fine until the alternator is warmed up, same goes for the diode-bridge.
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  #33  
Old 03-28-2018, 04:20 PM
icecolder icecolder is offline
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Re: Battery charging problem... i guess..

So today been putting bike back together. I had split into parts and put back generator cleaning every contact, also cleaned all connectors of wires which connecting generator, and sanded down battery terminals and battery wire connectors until thous got shining like new. Bolted down battery real tight. On every connector used some wd40 fluid. Also some more fluid on a battery wires just in case it has some small crack somewhere and used lots of it to clean the starter relay. Used lots of wd40 everywhere.

Interesting results- i have 14.5V on a battery terminals on idle now. It was 14.2v and never higher before. Not sure that 0.3v makes any difference but anyway its nice to know job was not totally useless.
And bike cranked more easy. Now it is about twice as fast starting than before.

Also side job with abs.
I already wrote that abs behave strange lately. It used to be like this- after bike started abs light flashes (thats normal) and after few second it pops up abs error with yellow triangle. But i been bypassing this error for a long time simply cranking the bike and starting to move immediately. This way abs error never popped up. So now opened up abs unit filler caps and checked fluid level. I even could not see a fluid there! it was lower than a protective mesh. Add ~40ml to a front circuit just to get equal with white marker bottom, and about 20ml to the back circuit to get equal level with white marker bottom. The result- now abs does not pops up any errors. Also on battery terminals bike used to drop voltage from 14.2 to 13V once front brake pressed hard. So it was 1.2V momentary drop of voltage once front brakes used at max. Now voltage is 14.5V and on brake max press voltage drops to 13.6v. So it is 0.9v momentary drop. Do not know how much effect had by toping up abs unit and how much effect gave the connectors cleaning, but looks like abs requares less voltage now.

Bad side- i could not take bike out of garage today and done some measurements only on standing bike. Thous changes looks nice but i do not know is my problem is still there and is it still draining battery on high rpm. Tomorrow will test on a road..
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  #34  
Old 03-28-2018, 04:39 PM
knutk knutk is offline
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Re: Battery charging problem... i guess..

Thank you for sharing. We're all cheering for you

If high RPM is a problem, rather than heat, perhaps revving the engine in the garage may make a difference?
By reinstalling the generator, may be the grounding through the engine got a needed refresh?
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  #35  
Old 03-29-2018, 11:42 AM
icecolder icecolder is offline
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Re: Battery charging problem... i guess..

Tested bike on a road. Looks the problem is solved for now. Now it charges battery on all rpm, everything looks nice at the moment. Of course i tested it just for a half a hour but it looks ok now as riding on high rpm did not drained battery this time- it charged it as should.

In short what was done- generator split into parts and cleaned everything, especially connectors. Also connectors of battery wires going from generator to batteries was cleaned to- used some sandpaper and all connections oiled using wd40. ABS unit was filled up to the max. Charging voltage increased from 14.2 to 14.45. It charges battery on all rpm now. ABS unit draws less electricity than before and does not pops errors.

Looks these bikes does not love sea weather- to much humidity and wires, connectors and electric parts becomes oxidized causing electric problems. Non of my components failed. It was simply oxidized connectors.
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Old 03-29-2018, 11:52 AM
knutk knutk is offline
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Re: Battery charging problem... i guess..

Good thing you solved the problem, and thank you for sharing the solution.
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Old 03-31-2018, 08:54 PM
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Re: Battery charging problem... i guess..

Suzuki v stroms had the exact same problem resulting in a recall as there was insufficient insulation around the stator windings resulting in a flat battery when hot. Glad you solved your issue.
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  #38  
Old 04-02-2018, 12:46 PM
icecolder icecolder is offline
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Re: Battery charging problem... i guess..

UPDATE

Yes, the problem was rusty and oxidized connectors, but PARTLY only, and cleaning everything made impact on performance, but been updating my new map using Autotune module for PCV and found out when using autotune together with heated grips discharges battery in about 20mins. Now i get clear error each time with battery and red triangle blinking, which states the charging is to low. When using autotune alone it does not cause such a problems, and when using heated grips alone it does not cause any problems too. I found it out only now as set autotune on switch of on/off. It used to be set on autostart after 10 mins of riding so it was hard to detect this issue. Now it became very clear when on/of switch is installed. Also found that dynojet autotune module can draw up to 5A of electricity and early models (such as mine) had 50A generator instead of later updated models which has 55A. Simply the generator is to week for everything i guess.

I tested this situation numerous time now and now can say for sure it is combination of grips and autotune and week generator. Error pops up each time when using everything together, and NEVER when whichever one is turned off.

Not going to upgrade generator as autotune is just for temporary use. Will take it out later and while using it now will not use heated grips. Thats all i can do in this situation.

End of story. For sure this time
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  #39  
Old 04-02-2018, 01:05 PM
knutk knutk is offline
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Re: Battery charging problem... i guess..

Quote:
Originally Posted by icecolder
UPDATE

Yes, the problem was rusty and oxidized connectors, but PARTLY only, and cleaning everything made impact on performance, but been updating my new map using Autotune module for PCV and found out when using autotune together with heated grips discharges battery in about 20mins. Now i get clear error each time with battery and red triangle blinking, which states the charging is to low. When using autotune alone it does not cause such a problems, and when using heated grips alone it does not cause any problems too. I found it out only now as set autotune on switch of on/off. It used to be set on autostart after 10 mins of riding so it was hard to detect this issue. Now it became very clear when on/of switch is installed. Also found that dynojet autotune module can draw up to 5A of electricity and early models (such as mine) had 50A generator instead of later updated models which has 55A. Simply the generator is to week for everything i guess.

I tested this situation numerous time now and now can say for sure it is combination of grips and autotune and week generator. Error pops up each time when using everything together, and NEVER when whichever one is turned off.

Not going to upgrade generator as autotune is just for temporary use. Will take it out later and while using it now will not use heated grips. Thats all i can do in this situation.

End of story. For sure this time

I find it hard to belive that Autotume would draw so much power that the charging should be affected, and the grips draw are 25Watts, for all practical pupose it should be negligable.

When you have seperate items that causing problems may mind strays towards a common factor, ground. If / when you have the time I would like to suggest that you check the grounding from the engine to the battery. 50A generator is still way more than what most bikes have, and should be plenty of power unless you hook up the kitchen stowe to it.
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Old 04-02-2018, 02:43 PM
icecolder icecolder is offline
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Re: Battery charging problem... i guess..

5A for autotune is what manual of autotune says. Souds a lot to me too but it says so. I tested this combo several times- now i can ride with heated grips OR autotune and it does not drains battery at all and keeps it charged. But once both are turned on- 20mins and error of flashing battery with red triangle appears. It is as it is- tested it several times and always the same result.

I tested the ground already when bike was split- no electrical leaks.
Little tired about this and i think i will keep going as it is and will drop out autotune after map will be finished and will forget this issue.
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Old 04-02-2018, 05:15 PM
knutk knutk is offline
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Re: Battery charging problem... i guess..

Quote:
Originally Posted by icecolder
5A for autotune is what manual of autotune says. Souds a lot to me too but it says so. I tested this combo several times- now i can ride with heated grips OR autotune and it does not drains battery at all and keeps it charged. But once both are turned on- 20mins and error of flashing battery with red triangle appears. It is as it is- tested it several times and always the same result.

I tested the ground already when bike was split- no electrical leaks.
Little tired about this and i think i will keep going as it is and will drop out autotune after map will be finished and will forget this issue.

My point was not to question if Autotune draws 5A or not, rather that for a K-bike, 5A is not much of a load and the bike should be able to handle the load easy.

I appreciate the tiredness of the matter, but I hope I am not too negative when I suggest that there is still a problem. If the generator is fully functioning the mentioned load should be a peace of cake. So either the generator is not delivering a full load, or there is a problem with the supply-lines. Since the positive side has been checked, the alternative is the grounding, even though a bad grounding should also affect the starting ability of the bike, so not very likely in this case.

If the alternator is not able to cope with the Auto tune and heated grips simultaneously, then you will also get a problem with high-beams driving at night.

When you are less sick and tired of the issue I would suggest the next step to confirm the output capability of the generator. A normal working generator should not give such a problem, as the mentioned loads are way below a 50 A generators capability.

Good luck
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