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Mystery bits inside my Griso's headlamp housing

Discussion in 'Griso-Bella Chat & Tech' started by MrMorrisSD, Apr 29, 2012.

  1. MrMorrisSD

    MrMorrisSD Tuned and Synch'ed

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    Hi folks. I was opening up my '07 Griso 1100's headlamp housing to replace the bulb. I removed the bottom screw to separate the bezel/bulb from the rear housing and the following little pieces fell out. (The key is obviously just there for scale.):

    A small brass tube and a couple of deteriorated o-rings.

    Any idea what these are supposed to do, if anything?

    [​IMG]
     
  2. Will

    Will Cruisin' Guzzisti GT Contributor

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    The tube is a spacer and fits with the O rings on the screw that holds the headlight rim to the shell. I think the theory is that they hold the screw on the rim when you undo it so you don't drop the screw on the floor/in the mud and lose it.. But it doesn't work....the screw has come off the rim and dropped into the bottom of the headlight shell every time I've undone the headlight on either of my Grisos. I was bloody glad to find the little tube inside the second time I opened up the headlight ....I hadn't noticed it had fallen off the first time and I'd been trying to trace the annoying rattle for about a year!
     
  3. draidt

    draidt GT Reference GT Contributor

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    O ring's did the same on my Griso and V7C, I went down to my local Plumbing supply house ( In the US any ACE hardware store) and sourced some the same size and way better quality (Damn Bean counters).
     
  4. MrMorrisSD

    MrMorrisSD Tuned and Synch'ed

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    Thanks. So I don't imagine there's any need to try and reuse the brass tube. I had no problem at all reinstalling the headlight and it fits tight now.

    As for the o-rings, I think they may have fallen from the top of the housing. Does that sound right? When I pulled the bezel away, I saw a piece of an o-ring on one of the 'hooks' (for lack of a better term) near the 12-oclock position of the housing where the bezel hooks on. Did the o-rings go around those hooks to provide some cushioning between the bezel and the housing? That's the only explanation I can think of.
     
  5. draidt

    draidt GT Reference GT Contributor

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    Yes from the 2 "hooks" the headlite cover hangs on. I would reconsider not installing the brass tube, with it you can snug down the screw with out fear of distorting the the screw hole in the cover by tightening it down to much and the possibility if it is not snug down enough of the screw vibrating loose. The tube is there for a reason and that is it.
     
  6. MrMorrisSD

    MrMorrisSD Tuned and Synch'ed

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    Ah. Thanks Dan. That does make sense.

    So just to make the procedure clear, I should do the following when reinstalling the lamp assy into the housing?

    1. Put the two (new) o-rings over the hooks.
    2. Insert installation screw through bezel.
    3. Slip brass tube over installation screw.
    4. Place lamp assy into position on housing.
    5. Line up installation screw with its connector dealie in the housing and tighten until snug.
     
  7. draidt

    draidt GT Reference GT Contributor

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    You got it !
     
  8. MrMorrisSD

    MrMorrisSD Tuned and Synch'ed

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    Cool. BTW, what I was doing was swapping out my stock H4 bulb for an Osram Silverstar. A friend suggested it to me after making the same upgrade on his Harley. Very much improvement in light output with the new bulb, without having to up the wattage. (This Osram is 55/60w I believe.)
     
  9. draidt

    draidt GT Reference GT Contributor

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