Author Topic: Cb550 1975 main fuse sizes  (Read 242 times)

Offline Ibby4585

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Cb550 1975 main fuse sizes
« on: November 01, 2020, 09:39:57 AM »
Hi.

Still waiting for my Clymer mag to come, could someone tell me the size of the main tube fuses please?

Cheers
Kris

Offline Johnny4428

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Re: Cb550 1975 main fuse sizes
« Reply #1 on: November 01, 2020, 09:56:35 AM »
15a main fuse. 7a headlight and 5a tail.
1952 Cymoto on Triumph bicycle.
1961 Matchless G3
1978 Honda CB550K3.
1999 ST1100 Pan European 50th Anniversary.
1975,1980,1984,1986 Honda C90’s
1973 Honda CB750K3

Offline Ibby4585

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Re: Cb550 1975 main fuse sizes
« Reply #2 on: November 01, 2020, 11:09:33 AM »
Lovely cheers

Offline deltarider

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Re: Cb550 1975 main fuse sizes
« Reply #3 on: November 01, 2020, 12:21:26 PM »
Size is 25mm. A bit hard to get nowadays.

Offline Johnny4428

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Re: Cb550 1975 main fuse sizes
« Reply #4 on: November 01, 2020, 12:44:29 PM »
Yes indeed, I did manage to source 25mm fuses off eBay after a bit of searching but by the time I got them home they were getting on for a quid each.
1952 Cymoto on Triumph bicycle.
1961 Matchless G3
1978 Honda CB550K3.
1999 ST1100 Pan European 50th Anniversary.
1975,1980,1984,1986 Honda C90’s
1973 Honda CB750K3

Offline Ibby4585

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Re: Cb550 1975 main fuse sizes
« Reply #5 on: November 01, 2020, 03:48:57 PM »
Brilliant cheers.

Yes just got some thinner ones from Halfords for the moment judy to test things, but  will buys some correct ones tonight.

Offline hondarc166

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Re: Cb550 1975 main fuse sizes
« Reply #6 on: November 01, 2020, 04:08:41 PM »
if you don't mind it not being standard fit a new fuse box for blade type

Offline Ibby4585

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Re: Cb550 1975 main fuse sizes
« Reply #7 on: November 01, 2020, 05:02:47 PM »
Unfortunately I'm mr standard and original, but I have though about that.

Offline SteveW

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Re: Cb550 1975 main fuse sizes
« Reply #8 on: November 01, 2020, 05:30:05 PM »
I found that with the standard fuse box the fuses would vibrate downwards and come out of their holders.
Even with squeezing the holder together they still did it.

Replaced with a 4 way blade fuse box, so i have a spare as well.

1974 CB550 K0
2000 CBR929RR Fireblade
1966 Lambretta LI150 Series 3
1981 RD350LC
1972 Raleigh Chopper
1974 Raleigh Tomahawk
2011 Henry Hoover

Offline Gromitdog

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Re: Cb550 1975 main fuse sizes
« Reply #9 on: November 02, 2020, 08:53:21 AM »
Hi Ibby4585

I can source 15A 8A & 5A Glass fuses (30mm L x 6.4mm Dia,) fairly cheaply but have yet to be able to find a source of 8A ones Try looking on the M&P motorcycle website will give you a idea of cost I have a trade account with them if that helps you

Nigel
KEEPING IT SHINY SIDE UP IS ALWAYS A GOOD RESULT ON A RIDE OUT

Offline Bryanj

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Re: Cb550 1975 main fuse sizes
« Reply #10 on: November 02, 2020, 09:08:25 AM »
There is an "age" problem with these fuse boxes in that the clips loose their "springiness" so the joint becomes a high resistance and heats up, frequntly enough to break  the contact between fuse and end cap(a swine to diagnose as the fuse looks good) and has been known to interupt the contact at back of fuse box and melt plastic box

Offline Ibby4585

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Re: Cb550 1975 main fuse sizes
« Reply #11 on: November 02, 2020, 05:11:14 PM »
Hi Ibby4585

I can source 15A 8A & 5A Glass fuses (30mm L x 6.4mm Dia,) fairly cheaply but have yet to be able to find a source of 8A ones Try looking on the M&P motorcycle website will give you a idea of cost I have a trade account with them if that helps you

Nigel

 Cheers Nigel.


Will have a look around.

Kris

 

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