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/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Battery drain after charging. /cgi-bin/YaBB.pl?num=1464456817 Message started by LS650THUMPER on 05/28/16 at 10:33:37 |
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Title: Battery drain after charging. Post by LS650THUMPER on 05/28/16 at 10:33:37 Not sure if this has been covered. After bringing Battery to full charge, bike runs ok...seems to loose a bit of charge over a few days..Lites dim, weak horn. Etc !! Bike runs with jump, use anything electrical and dies. 1.check battery ground at frame. 2. Could rectifier be bad?..3. fuses are ok. Did have issues with right side connection under tank. After looking at it,was able to correct it... replaced license plate lite a few years back... recently move rear directionals to plate. |
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Title: Re: Battery drain after charging. Post by verslagen1 on 05/28/16 at 10:43:56 bat to old to hold a charge? voltage at 4000 rpms? |
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Title: Re: Battery drain after charging. Post by justin_o_guy2 on 05/28/16 at 11:07:31 How old is the battery? Does it need water? |
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Title: Re: Battery drain after charging. Post by Armen on 05/28/16 at 13:59:59 Generally, a battery that goes flat over a few days is either a weak battery, or a parasitic load. Get a digital volt/amp meter. With the key off and the meter in the DC Amps position, connect the meter between the negative terminal of the battery and the ground lead. Meter should read zero, unless you have some gizmo that draws juice. I've seen a bunch alarms that started out drawing 3-5 millampers, and later got cranky and started to draw a lot more. Enough to flatten a battery. Bikes with electronic speedos will draw some juice, but not much. The other big culprit is the regulator rectifier. A bum diode can flow both ways and flatten a battery. If you see a draw on the meter, try disconnecting the reg/rect leads and see if the draw goes away. If it isn't the Reg/Rect, then pull out one fuse at a time until the draw goes away. If all looks peachy, reconnect the battery and switch the meter to DC Volts. Put the meter across the battery leads and hit the starter button. In decent weather, the voltage shouldn't drop below about 10 1/2 volts. If it does, the battery is on it's way out. -Armen |
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Title: Re: Battery drain after charging. Post by Dave on 05/29/16 at 04:04:20 Charge the battery, disconnect the ground lead, then let it sit for a day or two and connect it back to the bike......if it is discharged then you know it is the battery that is causing the problem. |
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Title: Re: Battery drain after charging. Post by Armen on 05/29/16 at 06:18:51 Unless a shorted rectifier or bad regulator toasted the battery. Then it is both issues, and you'll be buying another battery soon. Yup, seen that a few times. A decent digital meter is pretty cheap. When all else fails, do it right. -Armen |
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Title: Re: Battery drain after charging. Post by Savageman on 05/29/16 at 12:16:07 2 things come to mind. Measure voltage at the battery when engine is running at about 3000 to 4000 rpm should read 14.5 to 15.3vdc. Buy a new battery if charging voltage is good. I prefer the AGM type batts. Seem to hold up pretty well. Don't buy a cheap battery. |
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Title: Re: Battery drain after charging. Post by LS650THUMPER on 05/29/16 at 17:13:17 Ok I busted out my ole radio shack analog tester... battery is from 11/15 bought new sealed lead acid.. tested negative post and lead, got 0 on meter.. placed on POS and NEG post got 15 + reading. Started bike and read 15+ didn't drop .I did go over a lot of connections, so will retest tomorrow and see if there is a drop. Tried all lites and horn, no drop. |
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Title: Re: Battery drain after charging. Post by Armen on 05/30/16 at 13:14:53 Sounds like your meter is junk. Never saw a battery read 15V. Never saw one not drop under load. 12.7v is normal for lead/acid batteries. A little higher for Gel. A little higher for LiIo. Most bikes with a healthy battery will drop to the 10-11.5v range under starting load. Most bike charging systems do 13.8-14.5. A lot of early Suzi-Q systems will charge at 15.5. Which is why they blow up Lithium batteries unless you change the R/R. -Armen |
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Title: Re: Battery drain after charging. Post by Kris01 on 05/30/16 at 15:50:43 It is possible to read over 15V but if the starter is running, it's putting a load on the battery and will definitely drop the voltage. |
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Title: Re: Battery drain after charging. Post by Armen on 05/30/16 at 15:54:29 Must be a parallel universe. In 40 years of working on bikes I've never seen a bike battery read 15 volts. |
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Title: Re: Battery drain after charging. Post by LS650THUMPER on 05/30/16 at 17:59:30 Dead again after short trip. Any idea on cost of rectifier.. stop by dealer tomorrow.. can a older 87 ish work. Bone yard close too... |
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Title: Re: Battery drain after charging. Post by Kris01 on 05/30/16 at 19:13:59 6E5D424A412F0 wrote:
;D Maybe not on a motorcycle charging system (they're usually weaker) but I've seen 1 or 2 read slightly over 15V on a car/truck. |
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Title: Re: Battery drain after charging. Post by Kris01 on 05/30/16 at 19:16:06 5A45202326425E435B465344160 wrote:
How short? Maybe you aren't riding fast enough/long enough to charge the battery? |
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Title: Re: Battery drain after charging. Post by Dave on 05/31/16 at 03:49:49 2F30555653372B362E332631630 wrote:
Rectifiers are cheap.......eBay has them for $ 20...new or used. I still don't think you have done adequate testing to know if your battery is any good.....or if the charging circuit is at fault. Charge the battery, connect it to the bike, use a voltmeter and take readings. What is the voltage when you have the battery connected in the bike, what is the voltage when you hit the starter button - what is the voltage with the engine running and revved up a bit. If you don't see the voltage increase a bit when the engine is running......then the charging circuit is not working. Could be the rectifier.....or the stator, and there are tests you can do to find out - but first you need to prove that the system is not charging (voltage test described above). |
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Title: Re: Battery drain after charging. Post by LS650THUMPER on 05/31/16 at 08:22:38 Picked up basic volt gauge w/ clips. Connected to battery. Got 12v , hit start dipped to 10v popped back to 12v. Revd engine, and dropped toward 10v . |
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Title: Re: Battery drain after charging. Post by verslagen1 on 05/31/16 at 08:40:45 My guess would be rectumfryer. should not be dropping to 10 when you rev it though, did you have it hooked to the battery? and have you checked the open circuit voltage of the stator? each of the three pairs should go to 100v at high revs. |
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Title: Re: Battery drain after charging. Post by LS650THUMPER on 05/31/16 at 10:17:23 Was hooked to battery..did not check stator. Rectumfyer is 205 buzolians at the dealer.. will check all connections with the electrical cleaner just to get those nice. |
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Title: Re: Battery drain after charging. Post by Dave on 05/31/16 at 10:24:04 Rectifiers are $ 20 more or less on eBay....new or used. Official Factory one is $ 200. http://www.ebay.com/itm/Suzuki-S40-Boulevard-650-LS-LS650-Used-Regualtor-Rectifier-2009-SB25-/151974977966?hash=item23626a21ae:g:jjIAAOSwX~dWtUeI&vxp=mtr http://www.ebay.com/itm/2000-SUZUKI-LS650-SAVAGE-VOLTAGE-REGULATOR-RECTIFIER-/271897331597?hash=item3f4e58078d:g:8dMAAOSwpdpVeB7f&vxp=mtr http://www.ebay.com/itm/SUZUKI-LS650-SAVAGE-VOLTAGE-REGULATOR-RECTIFIER-86-04-1986-2004-LS-650-S40-/272239312421?hash=item3f62ba3e25:g:25YAAOSweW5VAh5H&vxp=mtr http://www.ebay.com/itm/NOS-Suzuki-LS650-VS650-Rectifier-Regulator-32800-24B10-/260879136354?hash=item3cbd9bb662:m:mI3nBRHDxGHX8qB43k29S8g&vxp=mtr |
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Title: Re: Battery drain after charging. Post by Savageman on 05/31/16 at 10:37:36 Easiest thing at this point since your battery is under warranty. Exchange it for a new one. Check your charging voltage with a good DMM or DVM. Can be purchased at Harbor freight for cheap or free with a coupon. Don't perform Brain Surgery on a hang nail! :-? |
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Title: Re: Battery drain after charging. Post by justin_o_guy2 on 05/31/16 at 11:37:50 Batteries are fickle beasts. If you have a problem, start with getting it tested. I would rather Not have one tested by the same people who will be replacing it for free, first. IDK if wal mart tests bike batteries, but they took the backhoe battery that I thought was dead meat after I left the key on and resurrected it. It's been around four years ago and it's still kicking. They have a very sophisticated machine that charges a battery as it monitors the thing. They handed me a printout that showed parameters of battery life and function I didn't know existed. Much more than the tests I'm used to seeing done at the car parts house. They have a charger and a load tester and a volt meter... heck, I have that.. |
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Title: Re: Battery drain after charging. Post by batman on 05/31/16 at 12:09:38 if you check the voltage coming from the stator ,you've disconnected it from the rectomfryer so that any two of the three yellow wires should read 100 volts but this is AC volts (hasn't been rectumfryed). |
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Title: Re: Battery drain after charging. Post by Kris01 on 05/31/16 at 17:37:26 Wait... the stator produces 100ACV which gets rectified to DCV and the regulator drops it to 12-14V? No wonder it gets so hot! :o |
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Title: Re: Battery drain after charging. Post by Savageman on 05/31/16 at 19:57:42 And be careful because 100VAC will knock you on yer ass. :o |
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Title: Re: Battery drain after charging. Post by LS650THUMPER on 06/19/16 at 11:28:44 Ok replaced rectumfyer..no change.. looks like I will be getting new stator. |
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Title: Re: Battery drain after charging. Post by LS650THUMPER on 09/27/16 at 15:14:21 After some time away. Replaced rectumfryer no change, so I'm Ready to tackle stator replacement.. 1st question, any special tools needed. 2. Remove cover and replace. |
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Title: Re: Battery drain after charging. Post by verslagen1 on 09/27/16 at 15:16:53 None that I know of. yes just r&r cover. and note the cover is hard to get off, held on by magnets. |
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Title: Re: Battery drain after charging. Post by Savageman on 09/27/16 at 17:32:47 I don't think it's the stator. OHM it out and then each wire to ground. Post readings. Right at the large connector at the rectumfrier. Should be 3 yellow wires that come from stator. Usually the stator coils don't burn out unless someone jumped it and left the cables on to long. Check ALL your connections. :o |
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Title: Re: Battery drain after charging. Post by LS650THUMPER on 09/28/16 at 19:31:36 Ty will check w/meter... Not jumped...but do notice possible belt dustyness. could belt dust get in the stator area ?? |
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Title: Re: Battery drain after charging. Post by Armen on 09/28/16 at 19:37:25 Nope. Stator is under a sealed cover. If dust could get in, oil would be leaking out. |
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Title: Re: Battery drain after charging. Post by Savageman on 09/28/16 at 21:52:52 The belt may have cut through a stator wire. Look at the exit point on the stator cover and visually follow the wire harness. If the belt is too close it will slice the wires in half and then no charge or even no run. CHECK IT OUT. |
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Title: Re: Battery drain after charging. Post by LS650THUMPER on 11/13/16 at 20:37:25 Hey everyone..new stator in, two spot burnt on stator.. runs great .. 14.5 Volt's running. Think that's good . |
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Title: Re: Battery drain after charging. Post by LS650THUMPER on 11/13/16 at 20:53:54 Two spots on stator burnt. |
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Title: Re: Battery drain after charging. Post by Savageman on 11/13/16 at 22:08:54 If you had a DVM you could have Ohmed out each coil phase and avoid all the guess work. It's a 3 phase alternator each pair should be the same Ohms and no ohms to ground. If coils are fried then your resistance (OHMS) will go down indicating a short. Meaning stator no good end of story. ::) |
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Title: Re: Battery drain after charging. Post by batman on 11/14/16 at 14:14:59 which mean you replaced the rectumfyer for nothing! when you could have bought a meter for less than $10.00 that would have saved you both time and money,as Savgeman ,and others suggested . |
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Title: Re: Battery drain after charging. Post by Savageman on 11/14/16 at 17:29:52 Thank you! |
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Title: Re: Battery drain after charging. Post by LS650THUMPER on 11/14/16 at 17:44:38 Tried testing. Haven't really put any money in the bike. Worse case is I have a extra rectumfryer... Thanks to all |
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