Author Topic: H4 headlight  (Read 5023 times)

Offline JezzaPeach

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Re: H4 headlight straining 15A fuse?
« Reply #30 on: August 14, 2020, 08:59:50 AM »
Hi Trig. Did this type fit?
1972 CB500/4 K1 Gold
Wanted: my 500/4 UGP96M
from 1975-78. Garnet Brown.

Offline Trigger

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Re: H4 headlight straining 15A fuse?
« Reply #31 on: August 14, 2020, 09:05:08 AM »
Yes, that cob type fit the H4 headlight but, there are some that have a fan on the back that are too long to fit in the headlight bowl  ;)

Offline JezzaPeach

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Re: H4 headlight straining 15A fuse?
« Reply #32 on: August 14, 2020, 09:07:26 AM »
Many thanks👍
1972 CB500/4 K1 Gold
Wanted: my 500/4 UGP96M
from 1975-78. Garnet Brown.

Offline deltarider

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Re: H4 headlight straining 15A fuse?
« Reply #33 on: August 14, 2020, 03:45:31 PM »
You are right of course, the power output does indeed increase with revs, sometimes to 14v. The headlamp filament is a crude affair that glows white hot by the heat created by the current passing through it. The higher the voltage, the brighter the lamp. If the voltage gets too high the lamp will blow.
Yes, but not because of a higher current which we express in A. Ever wondered why 6V cars and bikes need thicker wires?
So... the problem, the worry over possibly blowing a fuse, has now shifted to a worry over blowing a bulb? Anymore worries? Ever heard of cognitive dissonance?
Quote
LED is deffinately the way to go.
But... which led then? Have you seen tests that can help you make a choice? On H4s we have seen several over the years, all carried out by consumer organisations like the ANWB and ADAC (the Dutch and German AA, resp). What offers are you prepared to make? Extra costs? A reflector that will not fit properly anymore? Irritating oncoming traffic? Being blinded by your own LED light's reflections either by road signs or in less than perfect, read hazy, atmospheric conditions? In the UK your bikes are subject to periodic tests, I believe. Any risks there?
 

Offline JezzaPeach

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Re: H4 headlight straining 15A fuse?
« Reply #34 on: August 14, 2020, 06:21:33 PM »
I think the blowing of fuses etc has been well documented in the forum, and with elderly or corroded electrics and tired batteries on bikes not used as everyday rides, makes it worth considering the options, and a useful discussion many of us can learn from.
1972 CB500/4 K1 Gold
Wanted: my 500/4 UGP96M
from 1975-78. Garnet Brown.

Offline Seabeowner

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Re: H4 headlight straining 15A fuse?
« Reply #35 on: August 14, 2020, 06:35:28 PM »
In the UK your bikes are subject to periodic tests, I believe. Any risks there?
Tests are not required legally for most vehicles over 40 years old. But LED lighting for headlight, rear and indicators in not legal unless incorporated into new vehicles as part of their construction and use approval.
Phil
1971  CB500K0  Candy Jade Green or Candy Gold
1973  CB500K1  Candy Ruby Red
1975  CB550F1   Shiny Orange
1978  CB550K     Excel Black

Offline Bryanj

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Re: H4 headlight straining 15A fuse?
« Reply #36 on: August 14, 2020, 07:02:24 PM »
As an ex tester the only non legal light is HID  which must self dip. Led is legal as long as the paytern iscgood and the dip angle correct

Offline Nurse Julie

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Re: H4 headlight straining 15A fuse?
« Reply #37 on: August 14, 2020, 07:14:21 PM »
The Historic bikes of ours that I choose to still have MOT'd and that have LED's fitted pass the MOT with no problem, which as we know, has nothing to do with the C&U regs.
LINK TO MY EBAY PAGE. As many of you know already, I give 10% discount and do post at cost to forum members if you PM me direct.
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Offline Gromitdog

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Re: H4 headlight straining 15A fuse?
« Reply #38 on: August 15, 2020, 04:17:52 PM »
Hi Jeremy

Try this link they have a good stock of 30mm glass fuses in packs of 10 I brought some as spares and they look good. https://www.mandp.co.uk/search?q=30mm+glass+fuse

I have a trade account here but you need a order to be £50 + to get a good discount for you but always happy to quote for you

Rgds

Nigel

 

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Offline JezzaPeach

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Re: H4 headlight straining 15A fuse?
« Reply #39 on: August 15, 2020, 08:15:36 PM »
Hi Nigel that’s very kind of you. I may have a source now, if not will be in touch.
1972 CB500/4 K1 Gold
Wanted: my 500/4 UGP96M
from 1975-78. Garnet Brown.

Offline JezzaPeach

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Re: H4 headlight straining 15A fuse?
« Reply #40 on: August 15, 2020, 08:31:35 PM »
PS do you think these would fit?
15A 30mm
1972 CB500/4 K1 Gold
Wanted: my 500/4 UGP96M
from 1975-78. Garnet Brown.

Offline mike the bike

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Re: H4 headlight straining 15A fuse?
« Reply #41 on: August 15, 2020, 08:40:01 PM »
Yup, they'll do
Where's that 10mm socket got to?

Offline JezzaPeach

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Re: H4 headlight straining 15A fuse?
« Reply #42 on: August 15, 2020, 08:51:48 PM »
Perfect thanks Mike. In my rush to find a spare fuse carrier I bought an old one that’s gone rock hard but at least it has 3 fuses in it! New ones will be wrapped up nearby.
1972 CB500/4 K1 Gold
Wanted: my 500/4 UGP96M
from 1975-78. Garnet Brown.

Offline deltarider

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Re: H4 headlight straining 15A fuse?
« Reply #43 on: August 15, 2020, 09:16:39 PM »
IIRC, length of fuses is 25mm...

Offline JezzaPeach

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Re: H4 headlight straining 15A fuse?
« Reply #44 on: August 16, 2020, 09:01:36 AM »
Just checked and mine is 30mm x 6mm, and 25mm will also fit. The wires just have open grips on the ends that can be pinched slightly to ensure a snug fit. That then fits into a simple lozenge shaped case.
My fuse says 12.5A “constant”, 25A “blow”. I’m assuming 15A means 15A continuous/30A blow.

I have seen comments that originals are the blade shape (“better vs vibration” - in theory I dare say), mine is the thin wire and doesn’t look original. I see both types listed on eBay as genuine Honda, and not sure about the thin ones, but the Honda “marine” blade ones look genuine.

I’m sure either filament will do. Either way, I may as well go for the apparent standard 15A blade type while I’m at it.
« Last Edit: August 16, 2020, 06:25:24 PM by jeremypeachey »
1972 CB500/4 K1 Gold
Wanted: my 500/4 UGP96M
from 1975-78. Garnet Brown.

 

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