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Author Topic: 78 CB750K / Glass Fuse sources  (Read 1037 times)

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Offline mrmach5

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78 CB750K / Glass Fuse sources
« on: June 25, 2021, 06:16:14 AM »
Looking for a source for replacement glass fuses for a 78 CB750K.
The stock fuse box has a 5A, 7A, and a 15A main fuse. Problem is I can't fine these replacement fuses. I've tried auto parts stores, e-bay, amazon, and McMaster.com . These are a short stubby glass fuses that measure , 6mm dia. X 20mm length .
All I can find so far are 5mm X 20mm (to loose in clips ) or 6mm X 30mm (fits clips but too long, and fuse box cover won't go on.
Any suggestions on sources for these?
Thanks
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Offline goodtryer

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Re: 78 CB750K / Glass Fuse sources
« Reply #1 on: June 25, 2021, 06:23:24 AM »
I've replaced the fuse holder on 2 bikes with Hondaman's ATC "blade-style" box:

http://sohc4shop.com/catalog/product_info.php?products_id=48&osCsid=51cc130847b4ab4f1754e765ce278b9b
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1978 CB750K
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Online bryanj

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Re: 78 CB750K / Glass Fuse sources
« Reply #2 on: June 25, 2021, 07:35:16 AM »
I did get some on ebay but they came from China
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Online PeWe

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Re: 78 CB750K / Glass Fuse sources
« Reply #3 on: June 25, 2021, 08:53:45 AM »
I bought some packages from a German seller on Ebay 7 years ago. Same here, impossible to find that size, 25mm long.
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CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline StockRider

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Re: 78 CB750K / Glass Fuse sources
« Reply #4 on: June 25, 2021, 09:07:22 AM »
I picked up some spares from Carpy's last time I placed an order for other parts/tools. He keeps the 5A, 7A, & 15A in stock. Price is steep.

https://carpyscaferacers.com/product-category/shop-our-store/
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Offline madmtnmotors

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Re: 78 CB750K / Glass Fuse sources
« Reply #5 on: June 25, 2021, 09:20:17 AM »
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Online PeWe

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Re: 78 CB750K / Glass Fuse sources
« Reply #6 on: June 25, 2021, 09:38:28 AM »
You must have them somewhere over there?
If not, order from Germany to keep the original fuse design ;)

Both my CB750's have got relays and additional hang fuses for the larger loads as headlight and ignition. My K6 has louder horn via a relay and separate fuse

I did not find 5A, only 7A and 15A.
Here from same seller and possible to ship in one package. I did when I ordered at least 4 packages of 5 each, 7 and 15A.
https://www.ebay.de/itm/223897377655?hash=item342152db77:g:o4YAAOSw0sVe1fCw

https://www.ebay.de/itm/223897377667?hash=item342152db83:g:zY0AAOSwCdVe1fEw

If you'll get electrical issues, do not waste several fuses in the garage during fault trace. Repair with a few strands from a wire, attached on outside with help of tape where not in contact with fuse holder until fault found.
« Last Edit: June 25, 2021, 09:56:19 AM by PeWe »
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CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline Little_Phil

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Re: 78 CB750K / Glass Fuse sources
« Reply #7 on: June 25, 2021, 09:51:24 AM »
This guy in UK has the lot £1 each. (7.5A rather than 7)
https://www.ebay.co.uk/itm/274307718733
Also here:
https://www.arc-components.com/packs-of-10-25mm-automotive-glass-fuses.html
The US must have sources surely.
« Last Edit: June 25, 2021, 09:54:27 AM by Little_Phil »
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Offline 69cb750

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Re: 78 CB750K / Glass Fuse sources
« Reply #8 on: June 25, 2021, 11:55:47 AM »
Type AGW are .875" (22mm) long
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Offline david 750f

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Re: 78 CB750K / Glass Fuse sources
« Reply #9 on: June 25, 2021, 01:03:48 PM »
They are available at your local Honda dealer. Around $1 each.
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1976 CB 750F

Offline BenelliSEI

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Re: 78 CB750K / Glass Fuse sources
« Reply #10 on: June 26, 2021, 03:14:57 PM »
Vintagecb750.com sells them too.....
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Offline Alan F.

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Re: 78 CB750K / Glass Fuse sources
« Reply #11 on: June 26, 2021, 04:56:35 PM »
I picked up a bunch of these years ago, you can find ATC fuses in most convenience stores.

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Offline Primus

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Re: 78 CB750K / Glass Fuse sources
« Reply #12 on: June 27, 2021, 06:15:59 AM »
Out of desperation, I spent a fiver on one fuse and it was the only correct one I could find.  I've since thought sod this and swapped out for blade type.

Paul
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Offline Maltboy

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Re: 78 CB750K / Glass Fuse sources
« Reply #13 on: June 27, 2021, 07:05:38 AM »
MikesXS sells 25mm fuses, 10, 15, and 20A, for about $2 a box.  At least you could get the 15A cheap that way.
https://www.mikesxs.net/yamaha-xs650-25mm-glass-fuse-15amp-pk-5.html

AGX fuses are only 0.4mm longer than stock, but they may be the wrong type because they are all fast I think.
https://www.galesburgelectric.com/bussmann-agx-7-7a-fast-acting-glass-fuse/

Does Honda use fast or slow fuses? 
« Last Edit: June 27, 2021, 07:23:18 AM by Maltboy »
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Online PeWe

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Re: 78 CB750K / Glass Fuse sources
« Reply #14 on: June 27, 2021, 07:36:14 AM »
Important that headlight and rear light have smaller fuse than main fuse 15A so bike will not stop totally dead if headlight or rear will get a short.
I had a H4 bulb that shorted once.
Cheap bulb.

If using relays, separate hanging fuse near battery is used.
The stock 7A and 15A fuses for controlling the relays.
Earlier bikes have only one fuse. Fingers crossed for no short at all! ;D
« Last Edit: June 27, 2021, 08:16:56 AM by PeWe »
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CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967
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