Author Topic: Darn it!  (Read 5541 times)

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Offline sparty

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Darn it!
« on: December 12, 2009, 11:29:10 AM »
Wanted to take the Hot Rod for a spin today before winter really sets in.  My battery would not turn it over.  It is showing 12 volts, but I guess it doesn't have enough juice left to crank it over - 3 year old battery. 

ready to sore it for winter I guess.

Here are some pics.

1972 CB750 K2 Cafe' Style




GO AWAY SNOW AND COLD!  Can you see the Hot Rod wants to run...
“That's thirty minutes away. I'll be there in ten.”

Offline Don R

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Re: Darn it!
« Reply #1 on: December 12, 2009, 11:32:08 AM »
Sweet, don't blame you, I want to ride it too!
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Offline Gordon

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Re: Darn it!
« Reply #2 on: December 12, 2009, 11:33:34 AM »
Soichiro foresaw this issue decades ago...


Kick-start that beast and ride it!!!!! 8)

Offline sparty

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Re: Darn it!
« Reply #3 on: December 12, 2009, 11:40:28 AM »
Soichiro foresaw this issue decades ago...


Kick-start that beast and ride it!!!!! 8)

I wish I could kick start it.  My kick starter is broken - something internal is locked up.
1972 CB750 K2 Cafe' Style




GO AWAY SNOW AND COLD!  Can you see the Hot Rod wants to run...
“That's thirty minutes away. I'll be there in ten.”

Offline chrislib

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Re: Darn it!
« Reply #4 on: December 12, 2009, 11:44:18 AM »
Bump start it
Chris...closet Idlefiddler
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Offline Gordon

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Re: Darn it!
« Reply #5 on: December 12, 2009, 11:45:03 AM »
Bump start it

Or jump start it.  Come on Sparty, you have options! ;D

MötleyRöx

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Re: Darn it!
« Reply #6 on: December 12, 2009, 11:49:17 AM »
Just stare at it some more and take some great pictures for us to ooogle.


Great lighting on that bright snow blinding day for pictures, believe it or not. 

Offline Deltarider

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Re: Darn it!
« Reply #7 on: December 12, 2009, 11:56:33 AM »
Quote
It is showing 12 volts, but I guess it doesn't have enough juice left to crank it over

A 12 Volts battery that shows 12 volts is almost dead.
A 100% charged battery in rest will show around 12,7 volts
    80% 12,5 V
    70% 12,4 V
    60% 12,3 V
    50% 12,2 V
    40% 12,1 V
    20% 11,9 V
      0% 11,6 V
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Offline Jerry Rxman Griffin aka MuthaF'er

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Re: Darn it!
« Reply #8 on: December 12, 2009, 12:13:40 PM »
What a way to ruin a nice fall day.

Are you using a Battery Tender?
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Offline Deltarider

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Re: Darn it!
« Reply #9 on: December 12, 2009, 12:32:19 PM »
Quote
Are you using a Battery Tender?
One doesn't have to. When you don't use your bike for a longer period of time a batterycharge every five weeks is more than enough. There's no need to charge if battery reads 12,5 volts or more. All together tenders consume a lot of power worldwide and there's always a risk of fire. If insurance companies find out, you have a problem.

If you allow me: they've calculated that in all of Europe two coalburning powerplants work around the clock just to generate the electricity for... our doorbelltrafos! I repeat: our doorbelltrafos, two coalburning powerplants. They only ring a few seconds a day (if at all) and all that time, 24 hours per day valuable energy is lost in... heat. It's the same with all these tenders.
« Last Edit: December 12, 2009, 12:50:24 PM by Deltarider »
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Offline ANVkevin

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Re: Darn it!
« Reply #10 on: December 12, 2009, 12:58:40 PM »
That bike is gorgeous man!

Offline sparty

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Re: Darn it!
« Reply #11 on: December 12, 2009, 01:18:40 PM »
What a way to ruin a nice fall day.

Are you using a Battery Tender?

I do sue a tender, but I guess the battery has had its day.  Max charge I could get is around 12.3 volts.

I have a new AMG battery still in the box.  I guess I'll add the acid and get it to full charge.


1972 CB750 K2 Cafe' Style




GO AWAY SNOW AND COLD!  Can you see the Hot Rod wants to run...
“That's thirty minutes away. I'll be there in ten.”

Offline Deltarider

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Re: Darn it!
« Reply #12 on: December 12, 2009, 01:34:48 PM »
Best way to treat a new battery. Add acid* and leave battery alone for about an hour and a half. Then charge battery up to 14,4 volts with around 1 amp load (1,5 amp max!). Disconnect charger. Done.
*Take care not to spill acid on battery. This can create leakpaths.
« Last Edit: December 13, 2009, 10:47:45 AM by Deltarider »
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Offline 6adan

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Re: Darn it!
« Reply #13 on: December 12, 2009, 01:42:25 PM »
If you have a AGM it should be ready to go. They are a sealed battery.
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Offline sparty

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Re: Darn it!
« Reply #14 on: December 12, 2009, 01:56:25 PM »
If you have a AGM it should be ready to go. They are a sealed battery.

The AGM that I bought needs to be filled first.  I bought it unfilled so that I could store it until spring.  It is a DEKA, very nice battery.
1972 CB750 K2 Cafe' Style




GO AWAY SNOW AND COLD!  Can you see the Hot Rod wants to run...
“That's thirty minutes away. I'll be there in ten.”

Offline Gordon

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Re: Darn it!
« Reply #15 on: December 12, 2009, 02:52:10 PM »
I didn't know it was possible to fill an AGM battery. :-\

smokeygold

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Re: Darn it!
« Reply #16 on: December 12, 2009, 03:26:26 PM »
What a way to ruin a nice fall day.

Are you using a Battery Tender?

I do sue a tender, but I guess the battery has had its day.  Max charge I could get is around 12.3 volts.

I have a new AMG battery still in the box.  I guess I'll add the acid and get it to full charge.

Don't sue the tender! It will not work...use it instead! ;)


Offline Gordon

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Re: Darn it!
« Reply #17 on: December 12, 2009, 06:16:13 PM »
Sealed or not, they all need to be filled initially...

Thanks, but I'm hoping you knew that's not what I was talking about.  I meant by the consumer. 

Offline Gordon

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Re: Darn it!
« Reply #18 on: December 12, 2009, 06:33:54 PM »
No, actually, not how it came across to me... but that's ok.
I'm sure you meant it tongue in cheek.   ;)

Perhaps you should stick around for a while and get to know people here before trying to "school" anyone. ;)

Offline Tnutz

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Re: Darn it!
« Reply #19 on: December 12, 2009, 07:25:14 PM »
common sense would tell you that.  As an electrician, i can tell you....you don't fill AGM batteries.
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Offline 754

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Re: Darn it!
« Reply #20 on: December 12, 2009, 07:30:50 PM »
Geeezz, how many percent is my battery?
 It reads 6.8 volts after I run it!   :o   Neutral light up bright.

 and its less when I start it, sometimes you can barely see neutral light.. :o

 But I never use e-start... mayybe when I am 75 or 80 I will..
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Offline Deltarider

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Re: Darn it!
« Reply #21 on: December 13, 2009, 03:46:27 AM »
Quote
Geeezz, how many percent is my battery?
 It reads 6.8 volts after I run it!
Must be a 6 V battery, a 12 V battery that shows 6,8 V is no more, it's dead, stiff, it has perished and certainly hasn't the energy left to go and see it's maker.

Sure, you can prolong the use of your battery a lot by kickstarting. The original Yuasa and the second one on mine each lived 7 years, be it that the 7th year I was not able to e-start.  
« Last Edit: December 13, 2009, 03:53:58 AM by Deltarider »
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Offline Jerry Rxman Griffin aka MuthaF'er

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Re: Darn it!
« Reply #22 on: December 13, 2009, 09:42:35 AM »
Geeezz, how many percent is my battery?
 It reads 6.8 volts after I run it!   :o   Neutral light up bright.

 and its less when I start it, sometimes you can barely see neutral light.. :o

 But I never use e-start... mayybe when I am 75 or 80 I will..

Frank,

I think you're running at about 50%................ Now about your battery.... ;)

What weight oil do you use in your battery  ::)
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline 754

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Re: Darn it!
« Reply #23 on: December 13, 2009, 10:06:38 AM »
Delta, how much voltage do you think a starter uses?
Not saying that I know.

 I do know this, years ago we had a stock size battery in a 750 with a dead cell. Drilled holes in top, soldered a jumper across the dead cell, and closed up the holes. It e started (just fine), in summer weather, after that.. so I am thinking around 10 volts.

 Also I have been able to estart, warmed up motors with a 5.5 amp battery..
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Offline Deltarider

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Re: Darn it!
« Reply #24 on: December 13, 2009, 10:23:05 AM »
Quote
Delta, how much voltage do you think a starter uses?
Not saying that I know.
Nothing uses voltage, an electric starter (CB500) draws around a 100 amps, that's a consumption of well over 1200 Watts. That's a lot. As a rule of thumb: when - during an e-start - voltage drops below 9 volts, consider your battery shot (if it was well charged).

 
Quote
I do know this, years ago we had a stock size battery in a 750 with a dead cell. Drilled holes in top, soldered a jumper across the dead cell, and closed up the holes. It e started (just fine), in summer weather, after that.. so I am thinking around 10 volts.

 Also I have been able to estart, warmed up motors with a 5.5 amp battery..
Amazing.
« Last Edit: December 13, 2009, 10:29:52 AM by Deltarider »
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