Author Topic: Loss of complete power, FIXED! THANKS CAL!  (Read 770 times)

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Offline Tews19

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Loss of complete power, FIXED! THANKS CAL!
« on: August 31, 2014, 03:33:05 PM »
Less than 2 weeks ago I blew a fuse while riding. I swapped it out and today while riding I seemed to lose power while coming to a stop. I hit the start button and she fires up and home I get.

I swapped out the stock fuse box and simply put in a fuse. Today I attempted to fix this. See pic below. Now I have no power at all. I went to get another set up for the fuse and still no power. I pulled my gas tank and checked the connections there and all is connected. Any idea what to check?
« Last Edit: September 06, 2014, 03:25:22 PM by Tews19 »
1969 Honda CB750... Basket case
1970 Honda CB750 survivor.

Offline Tews19

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Re: Loss of complete power on 71 750
« Reply #1 on: August 31, 2014, 03:34:45 PM »
Here are a few pics. First pic is the replacement. Second pic is how I ran it with a fuse in it. I put my battery on a charger and it's fully charged.
1969 Honda CB750... Basket case
1970 Honda CB750 survivor.

Offline Tews19

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Re: Loss of complete power on 71 750
« Reply #2 on: August 31, 2014, 03:35:44 PM »
I am thinking it isn't my controls as they are brand new from Yamiya.
1969 Honda CB750... Basket case
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Offline Tews19

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Re: Loss of complete power on 71 750
« Reply #3 on: August 31, 2014, 06:29:17 PM »
I opened up my headlight bucket and there is white corrosion on the bucket itself. Also on the wires.  My jerry riggin skills seems to have jacked it up. New harness will have to be ordered.

Do I go with the 200 genuine honda or can I get the 90 buck repop?
1969 Honda CB750... Basket case
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Offline Greggo

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Re: Loss of complete power on 71 750
« Reply #4 on: August 31, 2014, 07:43:38 PM »
I opened up my headlight bucket and there is white corrosion on the bucket itself. Also on the wires.  My jerry riggin skills seems to have jacked it up. New harness will have to be ordered.

Do I go with the 200 genuine honda or can I get the 90 buck repop?

I just got a Z1parts.net harness and it is NICE!  (I offered $70 on ebay and they accepted).

Offline Tews19

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Re: Loss of complete power on 71 750
« Reply #5 on: August 31, 2014, 08:38:27 PM »
Thanks Gregg. I will scoop that up.
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1970 Honda CB750 survivor.

Offline ekpent

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Re: Loss of complete power on 71 750
« Reply #6 on: August 31, 2014, 10:32:44 PM »
What was wrong with the wires in the bucket Nick ? A complete harness change is a pretty big deal and there are a few differences through the years on them. Don't tear it all out till we get back from Holiday   ;)

Offline rb550four

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Re: Loss of complete power on 71 750
« Reply #7 on: September 01, 2014, 07:45:56 AM »
I don't know  but, it looks like the blade to the fuse may have been corroded , power got through the fuse and heated up the blade, that's where I would start looking for trouble, red, then red and brown then blacks.
 Are your grounds from battery to frame and coil ground clean and in good condition ?

Q: does " Jacked it up" in this case mean that the wiring harness is "cooked",  "fried", or "crispy"?
A few Honda 500's, a few Honda 550's, a few Honda 650's, '72 cb 450, a couple 500/550/650 hybrids, and 2001 750. 
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  http://forums.sohc4.net/index.php/topic,101678.0.html             
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Offline Tews19

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Re: Loss of complete power on 71 750
« Reply #8 on: September 01, 2014, 07:47:54 AM »
Lots of black burn marks on the main harness RB. The positive battery screw was loose. I noticed this after I cut.the burnt red fuse connection off.
1969 Honda CB750... Basket case
1970 Honda CB750 survivor.

Offline Tews19

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Re: Loss of complete power on 71 750
« Reply #9 on: September 05, 2014, 06:42:34 PM »
I received my new harness and ignition switch in the mail yesterday. Finally got around to replacing the crusty harness and still no power. Everything is wired correctly. Now to use the search feature on how and what to test next.
« Last Edit: September 05, 2014, 06:49:59 PM by Tews19 »
1969 Honda CB750... Basket case
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Offline Tews19

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Re: Loss of complete power, FIXED! THANKS CAL!
« Reply #10 on: September 06, 2014, 03:27:07 PM »
Special thanks to Cal! He literally walked/talked me through the process of elimination!  The K1 has power and no more jerry riggin!
1969 Honda CB750... Basket case
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Offline Retro Rocket

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Re: Loss of complete power, FIXED! THANKS CAL!
« Reply #11 on: September 06, 2014, 03:32:09 PM »
Good to hear Tews, Cals good people.... ;)
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If You can't fix it with a hammer, You've got an electrical problem.

Offline Tews19

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Re: Loss of complete power, FIXED! THANKS CAL!
« Reply #12 on: September 06, 2014, 03:33:40 PM »
He is real good people! Not only did he talk me through it but taught me.how to check for incase of future issues. But I better get 43 years out of this harness!
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Offline Retro Rocket

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Re: Loss of complete power, FIXED! THANKS CAL!
« Reply #13 on: September 06, 2014, 03:46:50 PM »
I have a new harness too mate, i'll be tickled pink if it makes it another 43 years, that would make me 94 years old..... ;D :o
750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline calj737

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Re: Loss of complete power, FIXED! THANKS CAL!
« Reply #14 on: September 06, 2014, 04:03:12 PM »
Aw, come now, Retro, as "others" have said, with the time it takes you to build a bike, it will only be in service for 6 months by the.  ;)

Having a laugh with you, not at you-
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"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 Retro Rocket

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Re: Loss of complete power, FIXED! THANKS CAL!
« Reply #15 on: September 06, 2014, 04:04:34 PM »
Aw, come now, Retro, as "others" have said, with the time it takes you to build a bike, it will only be in service for 6 months by the.  ;)

Having a laugh with you, not at you-

I'm right there with you mate.... ;D ;)
750 K2 1000cc
750 F1 970cc
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If You can't fix it with a hammer, You've got an electrical problem.

Offline Stev-o

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Re: Loss of complete power, FIXED! THANKS CAL!
« Reply #16 on: September 06, 2014, 05:30:01 PM »
Late to the party....so what exactly was the issue?
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Offline calj737

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Re: Loss of complete power, FIXED! THANKS CAL!
« Reply #17 on: September 06, 2014, 05:35:12 PM »
Ill never tell! Doctor/Patient privilege.

Okay, so he forgot to plug his new ignition switch into the main harness  ;D anything more complicated than that, and there's no way I could have fixed it  ::)
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"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 albertaboy

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Re: Loss of complete power, FIXED! THANKS CAL!
« Reply #18 on: September 06, 2014, 06:13:30 PM »
Good to hear Tews, Cals good people.... ;)
+1. Or should I say +2, Cal's helped me out of a bind a couple times. :)
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Offline Tews19

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Re: Loss of complete power, FIXED! THANKS CAL!
« Reply #19 on: September 07, 2014, 04:15:31 PM »
Lol I forgot to plug in the ignition?  Cal you promised!
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Offline calj737

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Re: Loss of complete power, FIXED! THANKS CAL!
« Reply #20 on: September 07, 2014, 05:08:40 PM »
I've been accused of many things in my life. Trustworthy is not among them.
'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
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"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