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Author Topic: 1980 Honda CB750-F Main Fuse blown  (Read 4967 times)

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rkeaton

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1980 Honda CB750-F Main Fuse blown
« on: July 25, 2009, 04:33:01 PM »
Howdy

First time on this forum.  I just bought the bike in question about a week ago, not running.  It needed a new battery which I just got from the shop today.  As I was hooking up the battery I got a big spark, but continued on.  Got it hooked up, turned the key and the ignition lights came on.  Cool.  Then, as a test I switched on the turn signal.  At that moment the main fuse blew and everything went dead.

I don't know much about working on bikes and even less about electrical.  I opened the plastic box where the main fuse is but can't even see how to remove it.  I took out the two small screws and when I did two metal clips fell out, they seemed to have been fried and dislodged from whatever they were connected to.

If anyone can tell me how to go about checking/replacing this main fuse I'd appreciate it.  Also, I'm of course wondering why this happened in the first place.  NO I did not hook the battery up the wrong way.  I'm positive ;)

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rkeaton

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Re: 1980 Honda CB750-F Main Fuse blown
« Reply #1 on: July 25, 2009, 04:53:04 PM »
I forgot to mention that the bike (which I got from the original owner) is not only not running but has been sitting garaged for several years.  He didn't do anything to prep it for storage.

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Offline cb650

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Re: 1980 Honda CB750-F Main Fuse blown
« Reply #2 on: July 26, 2009, 07:21:43 AM »
If its like the 80 650 those 2 "clips" are what is left of the main fuse.  The fuse is a thin metal strip that runs between the screws.  I just bought some for my 650 at honda for $1 each.
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rkeaton

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Re: 1980 Honda CB750-F Main Fuse blown
« Reply #3 on: July 26, 2009, 12:28:07 PM »
Ohhhhh.  I hadn't considered that.  I thought I needed to pull something else apart but that also makes sense.  The clips were totally fried for sure. 

Can I get that fuse at an auto parts store or do I need to wait for the bike shop to open on Tuesday? 
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Offline Bill/BentON Racing

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Re: 1980 Honda CB750-F Main Fuse blown
« Reply #4 on: July 26, 2009, 12:52:20 PM »
I don't think the auto parts store carries these.If I remember it was a 30 amp,old CB750Ks were 15 amp.glass fuses.You could make one but you might want to wait.If you don't want to wait, just get a cheap glass fuse holder w/wires,install proper amp and install,if you do,get a couple extra fuses.Good Luck,Bill
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Offline cb650

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Re: 1980 Honda CB750-F Main Fuse blown
« Reply #5 on: July 26, 2009, 05:06:06 PM »
Yes I've seen inline fuse holders used.     30A is correct.
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