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Thread: Headlight mods/upgrades on a wedge GT

  1. #1
    What, me worry? GILLY's Avatar
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    Headlight mods/upgrades on a wedge GT

    I have a thread going on a K-Bike.com forum, thought I would ask here, for those who might not frequent that site.
    My 07 GT came without Xenon, so I found a great deal (really cheap) on a Xenon kit. It has the 4300K color range, which is what the car manufacturers normally spec, nice white color. It is also rated at 35W, which is what BMW calls for on their own Xenon option.
    This should help a lot, but I am thinking about upgrading the high beam as well. These are H7 bulbs rated at 55W from the factory, Xenon option or not.
    There is so much info out there on different types of H7 performance bulbs that it'll make your head spin. Gets really confusing really fast.
    What makes the most sense to me might pose a risk, so was going to poll others about it before I act.
    Idea is to replace the stock H7's with Osram "Ultra High Output" 65W bulbs.
    10W higher than stock, but the Xenon is rated at 35W, whereas the stock low beam is also 55W, so I am going down 20W on the low beam but adding 10W/ea with the high beams (which of course wouldn't be on 100% of the time either).
    BUT of course the headlight ass'm is pricey and rather not having it running like a waterfall onto the front fender.
    Hoping I can get away with this but wondering if others have done anything similar to their bike. I'd rather just get what I can out of the stock headlight and not add aux lights to it.

    Gilly
    87 K75S, bought new, now sold
    07 K1200GT Bought new, now traded in
    13 C650GT
    MOA 44606

  2. #2
    What, me worry? GILLY's Avatar
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    Oh as an add-on question, does anyone know if the headlight assembly is essentially the same between the standard halogen and the Xenon (optional headlight)?
    Gilly
    87 K75S, bought new, now sold
    07 K1200GT Bought new, now traded in
    13 C650GT
    MOA 44606

  3. #3
    Honey Badger Semper_Fi's Avatar
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    The optical reflector geometry for Xenon and Halogen is different.

    In regards to the question of the higher wattage bulb, my concern would be if the bulb socket and surrounding lamp area can withstand the additional heat.

    More watts = more heat

    10 more watts is 18% over rating

    also how often do you use the high beams? for me its usually flash to pass
    2011 R1200 GSA Smoke Grey Metallic Matt
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  4. #4
    What, me worry? GILLY's Avatar
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    Quite a bit, early morning commute. Rest of the day, never. But want to see deer before they see me
    87 K75S, bought new, now sold
    07 K1200GT Bought new, now traded in
    13 C650GT
    MOA 44606

  5. #5
    What, me worry? GILLY's Avatar
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    Assuming your's has Xenon, can you post a pic of the inside of the headlight, say if you were just to walk to the front of the bike and take a pic of the headlight, camera facing down towards the headlight? I could post a picture of my halogen and we can compare.
    Gilly
    87 K75S, bought new, now sold
    07 K1200GT Bought new, now traded in
    13 C650GT
    MOA 44606

  6. #6
    Honey Badger Semper_Fi's Avatar
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    Give me a few minutes........
    2011 R1200 GSA Smoke Grey Metallic Matt
    2009 G450X White
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  7. #7
    What, me worry? GILLY's Avatar
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    Here is one view of mine:
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    87 K75S, bought new, now sold
    07 K1200GT Bought new, now traded in
    13 C650GT
    MOA 44606

  8. #8
    What, me worry? GILLY's Avatar
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    Slightly different view:
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    87 K75S, bought new, now sold
    07 K1200GT Bought new, now traded in
    13 C650GT
    MOA 44606

  9. #9
    What, me worry? GILLY's Avatar
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    Had to spiff the headlight up a little. This was the last thing a LOT of bugs ever saw!
    Would like to see if we can really spot a difference in the reflector shape.
    I would take comfort a little in knowing that the materials used are the same between the 2, but we might not be able to figure that out.
    My concern is your concern (times 10!), I don't want to wreck the headlight doing this.
    I'm fairly confident the wiring will handle the extra 10W per high beam without throwing a code;shutting off the lights due to increased load. But would like to be sure that the heat of the xenon plus the 65W bulbs won't hurt the housing. The lenses I would be pretty sure are the same material.

    Gilly
    87 K75S, bought new, now sold
    07 K1200GT Bought new, now traded in
    13 C650GT
    MOA 44606

  10. #10
    Honey Badger Semper_Fi's Avatar
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    Quote Originally Posted by Gilly View Post
    Assuming your's has Xenon, can you post a pic of the inside of the headlight, say if you were just to walk to the front of the bike and take a pic of the headlight, camera facing down towards the headlight? I could post a picture of my halogen and we can compare.
    Gilly
    Yes Xenon - due to downloading issues I need to post the pictures of the head light in seperate posts

    I tried to capture all the geometry of the reflectors for you

    Below is looking at the head lamp at a 90 degree angle to the throttle side
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  11. #11
    Honey Badger Semper_Fi's Avatar
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    From the front
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  12. #12
    Honey Badger Semper_Fi's Avatar
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    Clutch side
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  13. #13
    Honey Badger Semper_Fi's Avatar
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    Last one - from the bottom looking up
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  14. #14
    What, me worry? GILLY's Avatar
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    I'll try to match that one, only reverse image:
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    87 K75S, bought new, now sold
    07 K1200GT Bought new, now traded in
    13 C650GT
    MOA 44606

  15. #15
    Honey Badger Semper_Fi's Avatar
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    Gilly - from reviewing your pictures and mine - the overall geometry at first blush is very very similar.

    My only thought on this is that BMW designed it so that the reflector geometry will support both types of bulbs.

    Luis
    2011 R1200 GSA Smoke Grey Metallic Matt
    2009 G450X White
    IBA #35651
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