ADVrider

Go Back   ADVrider > Bikes > Thumpers
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 02-27-2013, 11:53 AM   #5311
Grinnin
Forever N00b
 
Joined: Dec 2005
Location: Maine
Oddometer: 2,512
Quote:
Originally Posted by GO_OUTSIDE! View Post
I've noticed the voltage on my '04 KLR650 has been dropping from 14.8V to 12.5V over a 45 minute ride to work with heated vest and grips running. Initially turning off the grips will bring the voltage back up but by the time I get to work it wont.
. . .

Any Idea where I should start looking?
When you draw current from the battery the voltage will drop. It can take lots of charging to bring the voltage up again. You can easily be charging with a voltage of 13.0, but that means that your battery is very discharged and it'll take a while to charge it up. You CAN be charging with a voltage of 12.5, but it means that you've used almost all the battery capacity and you need to charge it a long time.

I used to see this when trying to run my electric jacket off a 170W alternator (different bike). If I was stingy with the heat, the battery would recover OK. If I needed more heat I'd draw the battery down to where it took a LONG time to recover. That same battery is still in that bike several years later.

It sounds like you put your battery on a charger at home. Do you?
  • It could be simply drawing more than the alternator will provide.
  • It could be a battery losing capacity. (I see this in flooded batteries, but I am not so familiar with how this works for AGM.)
  • It could be a connection or regulator.
__________________
Motorcycles are magical.


Grinnin screwed with this post 02-27-2013 at 11:58 AM
Grinnin is offline   Reply With Quote
Old 02-27-2013, 12:59 PM   #5312
XDragRacer
Beastly Adventurer
 
Joined: Mar 2009
Oddometer: 2,872
Quote:
Originally Posted by GO_OUTSIDE! View Post
I've noticed the voltage on my '04 KLR650 has been dropping from 14.8V to 12.5V over a 45 minute ride to work with heated vest and grips running.
In my experience, my Generation 1 KLR650's electric power generation and storage system would not "keep up" with both Gerbing's jacket liner and gloves operating.

Fortunately, an obliging hill was available nearby for bump-starting when I discovered this electric power deficiency (thank goodness, the Generation 1's ignition runs off stator exciter coil alternating current, NOT the battery!)

Solution: Installed Race Tech 280-watt stator (and their heavy-duty rectifier/regulator, just for insurance, the stock unit would probably make it through).

Evaluation: WHAT? ME worry? Hundred-mile ride below freezing through snowfall; snug as the proverbial bug in the Gerbing's, bike kicked off flawlessly in 20-degree F. weather the next day.

IMHO, the Generation 1 stator's overly stressed with the electrical load you've applied; you may be able to get by with some "power management," as in turning off your auxiliary electrics before you shut 'er down, but . . . I think the long-term, worry-free solution is a more robust stator.
XDragRacer is offline   Reply With Quote
Old 02-27-2013, 03:27 PM   #5313
GO_OUTSIDE!
dirty hippie
 
GO_OUTSIDE!'s Avatar
 
Joined: Jun 2011
Location: Cville Virgina
Oddometer: 275
I guess Ill try a battery first. I was thinking that the voltage would be low with the engine off and stay low if the bike wasnt charging. Maybe I'll find a bad connection that is heating up and causing resistance as I ride. As a last resort I'll go for the upgraded stator and regulator.
I dont have the numbers anymore, but when I changed to all LED I took current draw readings. I remember that the power savings was significant especially with the brakes on. I also remember noting that I had ample power in reserve for heat, according to Kawasaki spec. I posted it up somewhere maybe I'll go find it.
__________________
Thank you!
Now Go Outside!
GO_OUTSIDE! is offline   Reply With Quote
Old 02-27-2013, 03:34 PM   #5314
GO_OUTSIDE!
dirty hippie
 
GO_OUTSIDE!'s Avatar
 
Joined: Jun 2011
Location: Cville Virgina
Oddometer: 275
Right! The part that is still confusing me is, HOW IS THE BATTERY DRAINING WHILE THE BIKE IS PUTTING OUT 14.5v???? Is it possible for the bike to put out voltage but not current? ohhhhhh I guess it is.
__________________
Thank you!
Now Go Outside!
GO_OUTSIDE! is offline   Reply With Quote
Old 02-27-2013, 03:49 PM   #5315
SkiBumBrian
DualSport Crazy !!
 
SkiBumBrian's Avatar
 
Joined: Jan 2012
Location: Redding, CA
Oddometer: 1,045
Quote:
Originally Posted by GO_OUTSIDE! View Post
Right! The part that is still confusing me is, HOW IS THE BATTERY DRAINING WHILE THE BIKE IS PUTTING OUT 14.5v???? Is it possible for the bike to put out voltage but not current? ohhhhhh I guess it is.
Have you checked whether you have a drain on the battery with the key off? Pull a terminal off a post and put an ammeter in series and see if there is a draw.... I haven't read all the posts relating to your issue so if someone already stated this. Then disregard. Listen to XDR, he has his poop assembled....
__________________
"Where ever you are, there you go..."
SkiBumBrian is offline   Reply With Quote
Old 02-27-2013, 04:10 PM   #5316
PWRCRZR
Grumpy Old Bastard
 
PWRCRZR's Avatar
 
Joined: May 2008
Location: Mid-Coast Maine
Oddometer: 7,421
Quote:
Originally Posted by JBradley500 View Post
Thanks for the quick reply.

Here's a couple of pictures of last nights easy project. I got a little blood on the old rotor


You will love that...well worth the money
__________________
However, I am not complaining because I know that I am probably better today then I will be tomorrow, so I try and enjoy every day as it comes, and stay determined to live well and be appreciative of what I still can do..."Stromsurfer"
PWRCRZR is offline   Reply With Quote
Old 02-27-2013, 04:27 PM   #5317
newcastleadam
Artful Tagger
 
newcastleadam's Avatar
 
Joined: Oct 2007
Location: Gainesville, Fl
Oddometer: 3,455
Quote:
Originally Posted by PWRCRZR View Post
You will love that...well worth the money
Indeed, any of the various front brake upgrades are well worth the money. Nothing like being able to stop when you want/need to.
__________________
Adam
86 KLR250 01 KLR685 06 K1200LT
As ever, buyer and seller of all things KLR
KLR Doohickey Wrench available!
The North Florida Tag-O-Rama wants YOU!
newcastleadam is online now   Reply With Quote
Old 02-27-2013, 04:41 PM   #5318
PWRCRZR
Grumpy Old Bastard
 
PWRCRZR's Avatar
 
Joined: May 2008
Location: Mid-Coast Maine
Oddometer: 7,421
Quote:
Originally Posted by newcastleadam View Post
Indeed, any of the various front brake upgrades are well worth the money. Nothing like being able to stop when you want/need to.
as with many bikes any upgrades to the brakes and suspension are welcome changes..
__________________
However, I am not complaining because I know that I am probably better today then I will be tomorrow, so I try and enjoy every day as it comes, and stay determined to live well and be appreciative of what I still can do..."Stromsurfer"
PWRCRZR is offline   Reply With Quote
Old 02-27-2013, 04:53 PM   #5319
SkiBumBrian
DualSport Crazy !!
 
SkiBumBrian's Avatar
 
Joined: Jan 2012
Location: Redding, CA
Oddometer: 1,045
Are you calling the stock setup on a KLR suspension???
__________________
"Where ever you are, there you go..."
SkiBumBrian is offline   Reply With Quote
Old 02-27-2013, 10:24 PM   #5320
XpressCS
Must. Have. Lumens..
 
XpressCS's Avatar
 
Joined: May 2012
Location: The big box California
Oddometer: 1,122
Any San Diegans that can come and lend a fellow KLR owner a hand tomorrow??
__________________
2004 KLR650

My KLR is my therapy session. My quiet time. My deep tissue massage. Me without my KLR is reason enough to be deeply concerned. It is what calms me the most. Soothes my mind. Eases my stress. -Me
XpressCS is offline   Reply With Quote
Old 02-28-2013, 03:51 AM   #5321
PWRCRZR
Grumpy Old Bastard
 
PWRCRZR's Avatar
 
Joined: May 2008
Location: Mid-Coast Maine
Oddometer: 7,421
Quote:
Originally Posted by SkiBumBrian View Post
Are you calling the stock setup on a KLR suspension???
well for lack of a better word

I have increased my spring to a 550lb, had the shock revalved, also revalved the forks and added heavier springs, those combined with a fork brace really improved the pigs handling manners
__________________
However, I am not complaining because I know that I am probably better today then I will be tomorrow, so I try and enjoy every day as it comes, and stay determined to live well and be appreciative of what I still can do..."Stromsurfer"
PWRCRZR is offline   Reply With Quote
Old 02-28-2013, 04:33 AM   #5322
Grinnin
Forever N00b
 
Joined: Dec 2005
Location: Maine
Oddometer: 2,512
Quote:
Originally Posted by GO_OUTSIDE! View Post
Right! The part that is still confusing me is, HOW IS THE BATTERY DRAINING WHILE THE BIKE IS PUTTING OUT 14.5v???? Is it possible for the bike to put out voltage but not current? ohhhhhh I guess it is.
Explaining electricity usually uses odd analogies and I'll add to the oddity.

Charging a battery with a small generator (or rectified alternator) is like pushing a cardboard box. When the box is full of weight you can push on it with 20 lbs of force and move it along. When the box is empty you can push and the box will move, but the box moves too fast to let you push with 20 lbs of force.

When your battery is full it acts as if it has high resistance and you can measure 14.5V. When the battary is empty it acts as if it has low resistance and the current is absorbed so fast that the voltage stays lower.

This IS in fact called "internal resistance" in the battery world. It is a resistance that is not directly measured with an ohmmeter. The internal resistance must be calculated by applying a higher voltage and measuring the amps going into the battery. Internal resistance changes with state-of-charge; it's higher with a charged battery and lower with a discharged one.

The usual analogy for electricity is water. When you pump water into a tank the water level will rise and the pressure at the bottom of the tank will increase. If you drain the tank, you can pump water into it but it will take a while for the level to rise. Your pump will spin faster and move more water if the tank is empty and it does so because the pressure is lower. If you can pump fast enough, you may be able to measure pressure higher than the water level can maintain when you stop pumping. If you have a big hole in the tank you'll have trouble rising the water level at all.

If the bottom of the tank is full of gravel and the tank is full, you may have high pressure, but after only a little water drains out the water level (and pressure) drop quickly. (And it's time to buy a new tank/battery).

My house runs on batteries. I wound my own coils for a wind generator to charge my house batteries. I watch battery voltage daily.
__________________
Motorcycles are magical.

Grinnin is offline   Reply With Quote
Old 02-28-2013, 05:39 AM   #5323
Rode2Nowhere
Beastly Adventurer
 
Rode2Nowhere's Avatar
 
Joined: Sep 2007
Location: Stillwater (next to Saratoga), NY
Oddometer: 2,192
^Cool analogy. Oh... and

Quote:
Originally Posted by Grinnin View Post
My house runs on batteries. I wound my own coils for a wind generator to charge my house batteries. I watch battery voltage daily.


__________________
- Jonathan
'88/'96/'08/'09 KLR650 Amalgamation
IBA #45896
Adirondack Tags
Rode2Nowhere is offline   Reply With Quote
Old 02-28-2013, 08:26 AM   #5324
XpressCS
Must. Have. Lumens..
 
XpressCS's Avatar
 
Joined: May 2012
Location: The big box California
Oddometer: 1,122
Quote:
Originally Posted by Grinnin View Post
My house runs on batteries. I wound my own coils for a wind generator to charge my house batteries. I watch battery voltage daily.
Link to build thread?
__________________
2004 KLR650

My KLR is my therapy session. My quiet time. My deep tissue massage. Me without my KLR is reason enough to be deeply concerned. It is what calms me the most. Soothes my mind. Eases my stress. -Me
XpressCS is offline   Reply With Quote
Old 02-28-2013, 10:40 AM   #5325
Dan Diego
Studly Adventurer
 
Joined: Dec 2010
Location: San Diego, CA
Oddometer: 660
Quote:
Originally Posted by XpressCS View Post
Any San Diegans that can come and lend a fellow KLR owner a hand tomorrow??
Sure What do you need? PM me and we'll go from there.

Dan
__________________
“If you never did you should. These things are fun and fun is good.”

Triumph Rocket III Touring, KTM 990 ADV
Dan Diego is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


Times are GMT -7.   It's 12:56 PM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014