« previous next »
Pages: [1]   Go Down

Author Topic: 80’ cb650c BARELY charging  (Read 1656 times)

0 Members and 1 Guest are viewing this topic.

Offline Easyskankin

  • Full Member
  • *
  • Posts: 5
80’ cb650c BARELY charging
« on: May 24, 2019, 08:58:42 AM »
My 1980 cb650 is barely charging. New rotor just installed. Reg/rec works battery fine. I’ve checked resistance in the key switch and fuse channels all normal. Wiring is solid. V drop tests are normal. Hoping someone can point me in another direction. Thanks, respect.
Logged

Offline calj737

  • Really Old Timer ...
  • *******
  • Posts: 21,069
  • I refuse...
Re: 80’ cb650c BARELY charging
« Reply #1 on: May 24, 2019, 10:08:27 AM »
Explain how you determined the Reg/Rec "works" and that the "battery is fine"...

Because something obviously isn't "working" or "fine"  ;)
Logged
'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
'73 500 Build http://forums.sohc4.net/index.php?topic=132935.0

"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline Easyskankin

  • Full Member
  • *
  • Posts: 5
Re: 80’ cb650c BARELY charging
« Reply #2 on: May 24, 2019, 10:19:01 AM »
Right, I checked resistance in the reg and it checks out fine also it’s not overcharging. I can’t get it over 12.5 V and that is at 5k rpm and above. The battery holds charge at over 12V. Maybe they’re aren’t fine what are you thinking?
Logged

Offline calj737

  • Really Old Timer ...
  • *******
  • Posts: 21,069
  • I refuse...
Re: 80’ cb650c BARELY charging
« Reply #3 on: May 24, 2019, 03:35:18 PM »
I'm thinking you need to start with the battery.

Charge the battery fully with a separate charger. Let it rest 2 hours, then measure the voltage across the terminals directly with a meter. What is it? It should be at least 12.6v for a lead acid, uptimes to 13.2v for a lithium.

If the battery checks out, then it's time to test the Reg/Rec and Stator. But start with the battery because any tests performed with a suspect battery are unreliable.
Logged
'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
'73 500 Build http://forums.sohc4.net/index.php?topic=132935.0

"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline Easyskankin

  • Full Member
  • *
  • Posts: 5
Re: 80’ cb650c BARELY charging
« Reply #4 on: May 24, 2019, 04:03:01 PM »
Charging now. Thank you for the time. Will report tomorrow
Logged
Pages: [1]   Go Up
« previous next »