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How to check charging?

Started by fjman, March 12, 2011, 12:29:51 AM

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fjman

March 12, 2011, 12:29:51 AM
I'm not really much of an electrician. How do I check the charging system of a bike with a voltmeter?  :wacko1:

oldktmdude

#1
March 12, 2011, 02:14:12 AM
  Connect positive lead of the meter to positive battery terminal, connect negative lead to earth or negative battery terminal, set meter to read 20 volts DC. Take a reading of the meter with the engine not running. Should read around 12.5 volts. Start engine and take another reading. This should read higher than the first reading, around 13 to 13.5 volts at idle. Increase revs and reading should rise to around 14 to 14.8 volts. Regards, Pete.
1985 FJ1100 x2 (1 sold)
2009 TDM 900
1980 Kawasaki Z1R Mk11 (sold and still regretting it)
1979 Kawasaki Z650 (sold)
1985 Suzuki GSXR 400 x2 (next project)
2001 KTM 520 exc (sold)
2004 GasGas Ec300
1981 Honda CB 900 F (sold)
1989 Kawasaki GPX 600 Adventure

fjman

#2
March 13, 2011, 01:45:06 AM
thanks for the reply i'll look into it  :dance:

fj1250

#3
April 03, 2011, 10:36:21 PM
Do the lights get brighter when you rev the engine above, idle?
then it's charging!

MC

fjman

#4
April 07, 2011, 02:13:09 AM
no they dont get brighter

TheRadBaron

#5
April 07, 2011, 08:53:17 PM
If the lights don't get brighter when the engine is revved, that points to the charging system not charging.  A voltmeter would still be a better way to verify, though. 
The desire for safety stands against every great and noble enterprise.  -Tacitus

rktmanfj

#6
April 07, 2011, 09:12:11 PM
Quote from: TheRadBaron on April 07, 2011, 08:53:17 PM
If the lights don't get brighter when the engine is revved, that points to the charging system not charging.  A voltmeter would still be a better way to verify, though. 

Perhaps to troubleshoot why it's not charging, otherwise, what's the point?      :unknown:

If it's not charging, it's not charging.

Randy T
Indy

srutherford

#7
July 08, 2011, 06:12:36 PM
Spo my bikes lights are supposed to get brighter as elms increase? I thought I had a problem shwew
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