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Savage3000 |
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Savage3000 L Plate Warrior
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stinkwheel |
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stinkwheel Bovine Proctologist
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xX-Alex-Xx |
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xX-Alex-Xx World Chat Champion
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WD Forte |
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WD Forte World Chat Champion
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stinkwheel |
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stinkwheel Bovine Proctologist
Joined: 12 Jul 2004 Karma :
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Posted: 16:06 - 05 Oct 2022 Post subject: |
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A good example was my bike the other week after a reg/rec failure. It was reading 12V at the battery with everything off. It was down to 4.5 once the ignition coil energised. ____________________ “Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles. |
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Savage3000 |
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Savage3000 L Plate Warrior
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stinkwheel |
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stinkwheel Bovine Proctologist
Joined: 12 Jul 2004 Karma :
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Posted: 20:39 - 05 Oct 2022 Post subject: |
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Hang on. Doesn't a CBF125 have direct lighting?
Do the main headlights work without the engine running?
If not, what you describe is pretty much normal. With the exception of it cutting out.If you've fitted higher wattage bulbs, it will struggle even more to light them at low revs.
As far as I can find out from google (and I can't find a decent sized wiring diagram), it works like my wifes Honda Wave in which case the headlight is powered directly from the alternator only when the engine is running. If the rev speed drops, you get less power and the light dims.
Assuming it's like the Honda Wave, it uses halfwave rectified AC to power the headlight and the other half of the wave to charge the battery.
What we did with the Wave was fit LED headlamp bulbs. It's important to use a good quality, non-polarity sensitive bulb because the part of the waveform it uses for the direct lighting is effectively positive earth. Also important to note you can't use an LED stop and tail light.
For reference, these are the exact bulbs I fitted which work well. Google says the CBF125 uses the same fitment. They give a very slight flicker if the engine is near stalling point but are otherwise bright and powerful.
https://www.classiccarleds.co.uk/products/compact-led-headlight-h4-p43t-472-motorcycle-hi-lo-beam-conversion-9-32v ____________________ “Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles. |
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jaffa90 |
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jaffa90 World Chat Champion
Joined: 06 Apr 2016 Karma :
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Posted: 21:52 - 05 Oct 2022 Post subject: |
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
Joined: 16 Aug 2013 Karma :
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Posted: 22:06 - 05 Oct 2022 Post subject: |
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Are you not able to to provide a precis rather than just a fucking boring link that eventually gets to the point? ____________________ trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Sprint ST 1050 |
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jaffa90 |
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jaffa90 World Chat Champion
Joined: 06 Apr 2016 Karma :
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Posted: 01:19 - 06 Oct 2022 Post subject: |
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Nobby the Bastard wrote: |
Are you not able to to provide a precis rather than just a fucking boring link that eventually gets to the point? |
Noddy at his best! |
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Savage3000 |
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Savage3000 L Plate Warrior
Joined: 14 Jun 2021 Karma :
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Posted: 10:10 - 06 Oct 2022 Post subject: |
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stinkwheel wrote: | Hang on. Doesn't a CBF125 have direct lighting?
Do the main headlights work without the engine running?
If not, what you describe is pretty much normal. With the exception of it cutting out.If you've fitted higher wattage bulbs, it will struggle even more to light them at low revs.
As far as I can find out from google (and I can't find a decent sized wiring diagram), it works like my wifes Honda Wave in which case the headlight is powered directly from the alternator only when the engine is running. If the rev speed drops, you get less power and the light dims.
Assuming it's like the Honda Wave, it uses halfwave rectified AC to power the headlight and the other half of the wave to charge the battery.
What we did with the Wave was fit LED headlamp bulbs. It's important to use a good quality, non-polarity sensitive bulb because the part of the waveform it uses for the direct lighting is effectively positive earth. Also important to note you can't use an LED stop and tail light.
For reference, these are the exact bulbs I fitted which work well. Google says the CBF125 uses the same fitment. They give a very slight flicker if the engine is near stalling point but are otherwise bright and powerful.
https://www.classiccarleds.co.uk/products/compact-led-headlight-h4-p43t-472-motorcycle-hi-lo-beam-conversion-9-32v |
I mean, it could be the Osram Nightbreaker 12V 60/55W headlight I fitted at the beginning of the year, I’ve always felt like it was dimming a bit but thought that was normal use. It’s only been recently when I’ve been riding during actual dark that I’ve noticed it properly, affecting the brightness of the Speedo etc whilst indicating.
It has only properly cut out once, which was last week when I was approaching a junction, slightly uphill, with the full beam on.
Maybe I should be looking at a lower Watt headlight and see if that sorts it? |
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MCN |
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MCN Super Spammer
Joined: 22 Jul 2015 Karma :
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Posted: 11:46 - 06 Oct 2022 Post subject: |
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A battery that shows fully charged is no indication that a battery is good.
The only sure fire method to determine if a battery is good or bad is to measure voltage across the terminals when a high load is being applied.
High Rate Discharge test.
A proper battery tester does that.
A new battery will cost you about <£40 for your bike.
https://www.tayna.co.uk/motorcycle-batteries/f/honda/ca125-95-96/ ____________________ Disclaimer: The comments above may be predicted text and not necessarily the opinion of MCN. |
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stinkwheel |
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stinkwheel Bovine Proctologist
Joined: 12 Jul 2004 Karma :
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Posted: 13:11 - 06 Oct 2022 Post subject: |
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Savage3000 wrote: |
I mean, it could be the Osram Nightbreaker 12V 60/55W headlight I fitted at the beginning of the year, I’ve always felt like it was dimming a bit but thought that was normal use. It’s only been recently when I’ve been riding during actual dark that I’ve noticed it properly, affecting the brightness of the Speedo etc whilst indicating.
It has only properly cut out once, which was last week when I was approaching a junction, slightly uphill, with the full beam on.
Maybe I should be looking at a lower Watt headlight and see if that sorts it? |
Yes. It's designed to run a 35/35W bulb, you're drawing nearly 60% more power than it's designed to supply. Assuming it's direct lighting, this is way too much, I'd expect it to be dim at low revs.
Seriously, those LED units I linked to are excellent (but pricey). Or fit a 35/35W nightbreaker. ____________________ “Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles. |
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WD Forte |
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WD Forte World Chat Champion
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xX-Alex-Xx |
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xX-Alex-Xx World Chat Champion
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Savage3000 |
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Savage3000 L Plate Warrior
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MCN |
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MCN Super Spammer
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stinkwheel |
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stinkwheel Bovine Proctologist
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Robby |
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Robby Dirty Old Man
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stinkwheel |
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stinkwheel Bovine Proctologist
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Savage3000 |
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Savage3000 L Plate Warrior
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Robby |
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Robby Dirty Old Man
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stinkwheel |
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stinkwheel Bovine Proctologist
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WD Forte |
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WD Forte World Chat Champion
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jaffa90 |
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jaffa90 World Chat Champion
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Old Thread Alert!
The last post was made 1 year, 199 days ago. Instead of replying here, would creating a new thread be more useful? |
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