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Headlight bulb and moisture

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  • 26-11-2022 2:00pm
    #1
    sirmixalot
    Registered Users Posts: 282 ✭✭


    Hi all, changed a bulb on a vstrom 2014 1000 dl. The original one looked like it was sealed, the new one has 4 little holes. These holes are letting in moisture and fogging up the headlight glass.

    The original one is blown and replacement works fine but for thise holes in it. Would soldering these holes over be OK from a heat perspective?

    20221126_124915.jpg
    20221126_124850.jpg




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    #2
    10-10-20
    Registered Users Posts: 7,159 ✭✭✭10-10-20


    How much humidity are we talking about here, just a haze or drops and a collection at the bottom? Is there a rear cap on the lamp fitting, is this not in place?

    These lights aren't sealed using the bulb, they need to be breathable to allow the warm air to expand and exit, bringing with it any damp. It's unlikely that the holes are the actual cause of the humidity, I'd be looking to see if there is splashing or a cracked seal on the unit.



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    #3
    sirmixalot
    Registered Users Posts: 282 ✭✭sirmixalot


    Good bit of moisture getting in, the whole lamp glass was fogged over, only noticed last week after a spin and the only thing that changed was replacing the bulb. As you can see from the original one (first pic left) this is sealed to some extent ie no holes unlike the new one on the right.

    Cap is on that fits over this and was sealed tight.



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    #4
    sirmixalot
    Registered Users Posts: 282 ✭✭sirmixalot


    Can only think that it's these 4 holes that are doing it.

    20221126_132213.jpg




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    #5
    sirmixalot
    Registered Users Posts: 282 ✭✭sirmixalot


    Everything around the lamp is good, seals fine and no cracks.



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    #6
    10-10-20
    Registered Users Posts: 7,159 ✭✭✭10-10-20


    You could use any silicone filler rather than solder. Most should be good to over 300 degrees C, some almost double that.



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    #7
    Hotblack Desiato
    Registered Users Posts: 35,057 ✭✭✭✭Hotblack Desiato


    When the lamp is on the temperature inside will be a lot higher than ambient, so any moisture will be driven out through the holes.

    lf you park your bike outside and/or wash it a lot, there's probably a leak which is allowing this moisture in.

    © 1982 Sinclair Research Ltd



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    #8
    sirmixalot
    Registered Users Posts: 282 ✭✭sirmixalot


    Took it out earlier today, was a little wet out, drizzle mainly and no problems at all, good hours spin. Last week was dry but really cold and that's when I noticed it. Maybe it was always this way and I just never noticed it. Will take it out again when it's around 2 degrees or so and see as today was very mild, so maybe no issue in this type of weather. Checked the other 2 bulbs fittings (parking light and high beam) and both were clicked into place and tight.



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