Dirty instrument-glass on inside - Triumph Forum: Triumph Rat Motorcycle Forums
Hinckley Classic Triples 885cc Classic Styled T3's: Legend, Thunderbird, Thunderbird Sport & Adventurer.

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post #1 of 26 (permalink) Old 10-02-2016, 03:15 PM Thread Starter
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Dirty instrument-glass on inside

I am having this urge to have a shiny bike. I have noticed that on the inside of both instrument glasses there are spots, and even a finger print. How do I get access to the inside of the glass without ruining anything? Itīs a 95 TBird. Pic attached.
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Regards, Mikael

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post #2 of 26 (permalink) Old 10-02-2016, 05:09 PM
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Find the guy who put the finger print there and ask him. They cannot be opened by mere mortals
denny likes this.

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post #3 of 26 (permalink) Old 10-02-2016, 06:45 PM Thread Starter
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Thatīs what I suspected. Nothing to do about it. Thanks for the reply

Regards, Mikael

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post #4 of 26 (permalink) Old 10-02-2016, 09:28 PM
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There are people who have worked around the bottom of the chrome ring with a thin screw driver and gotten the glass off, but it's hard to do without doing some damage, and doubly hard to get it crimped back down again without it looking like it has been butchered.

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post #5 of 26 (permalink) Old 10-03-2016, 03:54 PM
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There are a couple of old threads on here about successfully opening the cases. I did one and Arferbrick has done one using slightly different methods. It's no picnic, but I was OCD like you and did my tach just because it was foggy inside. It basically involves carefully cutting all around the plastic case, doing whatever is needed inside, and then rejoining the case halves. The other alternative is replacement new gauges which can be had for only about $300-$400.
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post #6 of 26 (permalink) Old 10-05-2016, 09:25 PM
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You might try to do something similar to what I did to open my tach:


https://www.triumphrat.net/maintenanc...achometer.html
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post #7 of 26 (permalink) Old 10-06-2016, 05:38 AM Thread Starter
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Hi Ssevy.

As I see it your way is the only way. I think itīs too much hassle to clean the glasses though. But thanks anyway.

Regards, Mikael

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post #8 of 26 (permalink) Old 10-06-2016, 07:45 PM
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What I want to know is how in the blazes bugs can get into these spaces - not on a bike but a couple of our older cars. there's a dead mosquito behind the clear plastic on one and a dead, dried-up spider in another. It's almost like they had to hatch in there or something.
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post #9 of 26 (permalink) Old 10-08-2016, 05:52 PM
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Ssevy: your PM mailbox is full...

You said to cut the housing in the area where the grommet contacts it (close to the glass). Any reason not to cut it farther down, where the metal cover, which has more clearance, covers it?

(My problem is the tach reads about 1000 RPM high and doesn't return to zero.) I'm thinking the spring on the needle may have come loose. I seem to recall Hondas plagued with that problem.

Do you know if the meter is a stepper? If so, maybe it's just not stepped back to zero, for whatever reason...

John
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post #10 of 26 (permalink) Old 10-08-2016, 10:49 PM
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Sorry John,


Just emptied my inbox.


If you look at the picture of the inside of the white plastic housing in my thread, you'll see there are some other things just below the spot I cut that would be affected if you cut it lower. Maybe no issue, but if you follow my lucky guess first cut, you know it's a proven thing. No reason you can't try whatever you want though.
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