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Amp guage question #423871
03/12/12 3:47 pm
03/12/12 3:47 pm
Joined: Aug 2001
Posts: 2,657
New Hampshier USA
MikeG Offline OP

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MikeG  Offline OP

BritBike Forum member
Joined: Aug 2001
Posts: 2,657
New Hampshier USA
I changed the headlight shell on my 71 T120 to a 68/70 style so's I can fit an amp guage. Does the guage take a gasket between it and the shell, and is there an insulated bracket to retain it? The small tabs on the guage bezel don't seem like enough to keep it from shaking around.
Thanks


1960 BSA A10
2007 Suzuki Bandit
1957 A10
(Used to be a Triumph here)
71 Norton Commando
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Re: Amp guage question [Re: MikeG] #423872
03/12/12 3:55 pm
03/12/12 3:55 pm
Joined: Nov 2008
Posts: 148
Oregon
M-Runner Offline
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M-Runner  Offline
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Posts: 148
Oregon
Some of those amp gauges came with a small o-ring for the bezel, I haven't seen those for a while now. I usually put a small ring of clear RTV around the amp on the inside, it keeps it from buzzing in the shell, and keeps it relatively water tight.

_________________________
1966 Bonnie
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Re: Amp guage question [Re: MikeG] #423882
03/12/12 4:52 pm
03/12/12 4:52 pm
Joined: Jan 2007
Posts: 252
Atlanta, Georgia
Atlanta Bonnie Offline
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Atlanta Bonnie  Offline
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Posts: 252
Atlanta, Georgia
Mike

It takes a skinny o-ring on top of the shell.

You have to bend those small tabs upward inside the shell , and it will hold it in place nicely.


Bruce


Re: Amp guage question [Re: MikeG] #423904
03/12/12 7:02 pm
03/12/12 7:02 pm
Joined: Jun 2002
Posts: 9,858
Scotland
S
Stuart Offline
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Stuart  Offline
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S
Joined: Jun 2002
Posts: 9,858
Scotland
Hi Mike

Originally Posted By: MikeG
Does the guage take a gasket between it and the shell,

Ime:-

. the original gauges had a rectangular-section rubber washer - the width of the bezel - between the bezel and the headlamp shell;

. I've never found these rectangular-section rubber washers as spares so I tend to measure the gauge body diameter just under the bezel and buy an 'O'-ring of slightly smaller i.d. (so it's slightly stretched by fitting around the body) - certainly in GB, most automotive parts shops have generic 'O'-ring kits, it's just a matter of finding one with the i.d. I want.

Originally Posted By: MikeG
is there an insulated bracket to retain it?

Why "insulated"? confused

Again ime, original gauges (and the modern ones I have) have two (2BA?) studs protruding from the bottom of the gauge body. A 'U'-shaped bracket with two holes in the bottom horizontal of the 'U' fits over these studs and is then retained by either two nuts locking together on each stud or one nut on each stud bearing on a spring washer. The distance across the ends of the 'U' is larger than the maximum o.d. of the gauge, so these ends bear (in this case) on the underside of the headlamp shell. So doing up the nuts pulls the gauge down (on the rubber washer/'O'-ring between the gauge and the shell) while pushing the ends of the bracket against the headlamp shell. As you can hopefully tell, not much force is required on the nuts to clamp the gauge securely in the headlamp shell.

Hth.

Regards,

Re: Amp guage question [Re: MikeG] #423911
03/12/12 7:31 pm
03/12/12 7:31 pm
Joined: Aug 2001
Posts: 2,657
New Hampshier USA
MikeG Offline OP

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MikeG  Offline OP

BritBike Forum member
Joined: Aug 2001
Posts: 2,657
New Hampshier USA
Stuart-the automotive sized guages I sell have the same type bracket, but the holes have plastic insulating sleeves so the guage studs/wires don't conduct thru the bracket.


1960 BSA A10
2007 Suzuki Bandit
1957 A10
(Used to be a Triumph here)
71 Norton Commando

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