Author Topic: '74 550K0 electrical gremlin  (Read 996 times)

0 Members and 1 Guest are viewing this topic.

Offline Wyattmakes6

  • Full Member
  • *
  • Posts: 9
'74 550K0 electrical gremlin
« on: September 11, 2012, 07:02:03 PM »
This has no doubt been beat like a dead horse but here it is anyway.  I have a 10K '74 550K0 survivor that has me scratching my noggin.  The battery went flat a month ago and wouldn't start the bike, trickle charged it and threw it back in and down the road we went.  Last weekend I made a five mile trip to my local hardware and upon my return, the bike won't start. It wouldn't kick start which it has always done up to now.  Get it home and the battery shows almost 12 volts on the meter.  Finished cutting the grass and figured why not - see if it will turn over.  Fires right up with the starter.  Hop on to take a close to home spin and it's running fine except I notice the turn signals don't blink, they just go dim.  Return to the garage and dig out the Clymer's manual and start running through the electrical section.  Ohm'd the rectifier as written and it's ok according to the book.  Checked the stator and rotor in the alternator, stator is on the numbers but the rotor, according to the manual, should show 4.6-5.0 ohms and mine shows about 4.0.  I have yet to do the voltmeter/ammeter test - that's next.  My question is thus - How does one check the voltage regulator?  There is nothing in the manual except a handslap that says most of us don't have the tools or expertise to check and adjust the regulator, so you might as well buy a new one as the old one is probably toast anyhow.  The problem with this logic is I called my dealer and the parts babe (and she is) told me the regulator is being phased out and I will have to part with $268 effing semolias to procure a new one.  Ouch!  Before I get bent over by Honda, I'd like to be sure I NEED to bend over.  Thanks for your time and replies/suggestions/sage advice.

Offline bender01

  • Master
  • *****
  • Posts: 1,858
  • "Follow the leader.He's on a Honda"
Re: '74 550K0 electrical gremlin
« Reply #1 on: September 11, 2012, 07:04:15 PM »
Clean battery terminals?
75 550 K1
74 750 K4
1968 450 K1 Super Sport
74 750k 836 project
http://www.bikepics.com/members/bender01/
So, the strategy is to lie to people you are asking for help?

I think I'll be busy going for a ride.

Good luck!
Two Tired Quote !

Offline Wyattmakes6

  • Full Member
  • *
  • Posts: 9
Re: '74 550K0 electrical gremlin
« Reply #2 on: September 12, 2012, 09:23:05 AM »
Clean as a pin.

Offline Duanob

  • Bold Timer
  • Old Timer
  • ******
  • Posts: 4,009
  • Gotcha!
Re: '74 550K0 electrical gremlin
« Reply #3 on: September 12, 2012, 09:34:20 AM »
On/off/on kill switch might need cleaning or replacing or bad ignition switch.

See this site:

http://www.oregonmotorcycleparts.com/FAQ.html
"Just because you flush a boatload of money down the toilet, doesn't make the toilet worth more",  My Stepfather the Unknown Poet

1974 CB360T
1976 CB550K2 Resurrected
1976 CB550F2 Barn Find
1979 CX500 VG "HONDA-GUZZI"
2007 Moto Guzzi Breva 750ie
2015 BMW F700GS
Another 1976 CB550K Cafe?

  __o
_- \_<,
(*) /' (*)

Offline jamesb

  • Expert
  • ****
  • Posts: 1,167
Re: '74 550K0 electrical gremlin
« Reply #4 on: September 12, 2012, 11:57:41 AM »
make sure all your connections are clean and there is no corrosion on them.my sons bike was doingthe same thing basically and the connectors where corroded it will be a blueish green colar. if they are bad just take a brass detail bruch and clean them up good.
I've done a lot of things in my life that I'm not proud of...and the things I AM proud of, "are disgusting"

Offline CoachDoc

  • Hot Shot
  • ***
  • Posts: 615
  • 1974 CB550, 2005 GL1800, 1997 Valkyrie Standard
Re: '74 550K0 electrical gremlin
« Reply #5 on: September 13, 2012, 08:47:09 PM »
make sure all your connections are clean and there is no corrosion on them.my sons bike was doingthe same thing basically and the connectors where corroded it will be a blueish green colar. if they are bad just take a brass detail bruch and clean them up good.
Agree 100%. Clean ALL your electrical connections, including the battery cables, the ground attachment area on the frame, the alternator and rectifier connections, all the fuse holders, etc. Don't be fooled by the absence of corrosion. The contact areas can be covered with layers of decades old oxidation which will impede current flow. Trickle charge your battery when you are through, and measure its voltage output to see if it is up to snuff. Be thorough, and your efforts will more than likely be rewarded.

Offline Duanob

  • Bold Timer
  • Old Timer
  • ******
  • Posts: 4,009
  • Gotcha!
Re: '74 550K0 electrical gremlin
« Reply #6 on: September 14, 2012, 08:43:54 AM »
And check you connection blocks behind the electrical panel. They can get hot and melt from corrosion. Oregonmotorcycleparts has the blocks and brass connections for cheap. If the fuse block is melted they have the blade type fuse blocks as well. They also have regs and rects for $50. Not OEM but work just the same. Let us know whatsup.
"Just because you flush a boatload of money down the toilet, doesn't make the toilet worth more",  My Stepfather the Unknown Poet

1974 CB360T
1976 CB550K2 Resurrected
1976 CB550F2 Barn Find
1979 CX500 VG "HONDA-GUZZI"
2007 Moto Guzzi Breva 750ie
2015 BMW F700GS
Another 1976 CB550K Cafe?

  __o
_- \_<,
(*) /' (*)