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#419192 - 02/17/12 4:57 pm Smiths gauge fitment list  
Joined: Dec 2011
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Torch2 Offline
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so. cal
where can I find an online fitment list for Smiths gauges?
specifically the Triumph M/C list.
I've got to find the right tack for a 57 T110, the RC/83 I have is a 2 to 1 and I think I need a 4 to 1 drive?
Nisonger can convert it but it's pricey.

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#419224 - 02/17/12 7:16 pm Re: Smiths gauge fitment list [Re: Torch2]  
Joined: May 2010
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TR6Ray Online content
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Illinois, USA
Originally Posted by Torch2
where can I find an online fitment list for Smiths gauges?
specifically the Triumph M/C list.
I've got to find the right tack for a 57 T110, the RC/83 I have is a 2 to 1 and I think I need a 4 to 1 drive?
Nisonger can convert it but it's pricey.

You might want to contact Scott Thomas at Triumph Restorations. His e-mail and phone numbers are:

scott@smithsgagerepair.com

224-595-2037

He let me spend the day in his shop with him, watching over his shoulder as he rebuilt both my gages, and I can't say enough good things about his workmanship and knowledge. He is the guy who advertises as Smiths Magnetic Instrument Repair in Motorcycle Classics Magazine.

Here are some pics of the work he did for me.

[Linked Image]

[Linked Image]

[Linked Image]

[Linked Image]


'64 TR6R Plus some Twins from other countries (U.S., Germany, Japan)
#419242 - 02/17/12 8:54 pm Re: Smiths gauge fitment list [Re: Torch2]  
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Tiger Dale Offline
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WOW Ray what did he charge for that?

TD

#419249 - 02/17/12 9:37 pm Re: Smiths gauge fitment list [Re: Torch2]  
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L.A.B. Online content
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Norfolk, UK
RC 126

#419280 - 02/18/12 1:36 am Re: Smiths gauge fitment list [Re: Tiger Dale]  
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TR6Ray Online content
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Originally Posted by Tiger Dale
WOW Ray what did he charge for that?
TD

That was in November, 2009, and he charged US$185 each gage for a total of $370.00. I don't know what it would cost now. Both gages were disassembled, and cleaned and lubed, and parts replaced as needed. They were tested throughout their range on a test bench. Both came with a year guarantee. The cases off my gages went on the shelf as "cores" and were replaced with identical parts that he had already refurbished. The faces, glass, and chrome bezels were replaced with new. He had a unique method of crimping the bezel into place to hold the glass, the case, and the seal in place. It was done on his lathe, with tooling that he had made himself. There was a Triumph wheel bearing mounted on the lathe cross slide that came in against the bezel and roll-crimped it without scarring the metal.

It was a most interesting day, and he is a unique, highly skilled workman to say the least.


'64 TR6R Plus some Twins from other countries (U.S., Germany, Japan)
#419309 - 02/18/12 4:34 am Re: Smiths gauge fitment list [Re: TR6Ray]  
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Posts: 6,670
Jon W. Whitley Online content
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Vermont
I like to think I am up-to-date and know of pretty much all suppliers/shops but this one is new to me. Looks like a real good shop to do business with.


Jon W.


1957 6T Thunderbird 650
1968 T100R Daytona 500
1971 TR6R Tiger 650
1970 BSA A65F 650
1955 Tiger 100 - Project

#419312 - 02/18/12 4:59 am Re: Smiths gauge fitment list [Re: TR6Ray]  
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ed_h Offline
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"Rolling" the crimp on the bezel probably looked similar to this. I've also seen it done where the bearing first comes in at a small angle to start the crimp, and subsequent passes are made with a greater angle until the tool is parallel with the side of the case.




For just a little more, you can do it yourself!
#419381 - 02/18/12 4:57 pm Re: Smiths gauge fitment list [Re: L.A.B.]  
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Torch2 Offline
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so. cal
L.A.B>- thanks for the model # info, and I assume a RC/126 is a 4/1 ?
I was also told 1307/02
is there an online place where I can find the fitment list?

Last edited by Torch2; 02/18/12 4:58 pm.
#419387 - 02/18/12 5:48 pm Re: Smiths gauge fitment list [Re: Torch2]  
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L.A.B. Online content
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L.A.B.  Online Content
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Norfolk, UK
Originally Posted By: Torch2
and I assume a RC/126 is a 4/1 ?
I was also told 1307/02
is there an online place where I can find the fitment list?


2:1 Apparently?

http://omega-13.com/smiths/smiths_2.htm

"RC 126(RC1305/00)
8000rpm
ratio 2:1
Clockwise"

The RC 126 tacho appears to have been optional equipment for Triumph twins during that period but there's no tacho drive gearbox for that application in the Smiths '54-'58 list.

http://www.flickr.com/photos/9383961@N05/2982504702/in/set-72157608455625820/

#419493 - 02/19/12 3:51 am Re: Smiths gauge fitment list [Re: L.A.B.]  
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Torch2 Offline
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so. cal
ok but the way I'm thinking is if the cam cover tack drive is a 2/1 drive and it's running off of the exhaust cam which is 2/1 from the engine then shouldn't the tack be a 4/1 tack?

Last edited by Torch2; 02/19/12 3:52 am.
#419524 - 02/19/12 9:39 am Re: Smiths gauge fitment list [Re: Torch2]  
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L.A.B. Online content
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Originally Posted By: Torch2
ok but the way I'm thinking is if the cam cover tack drive is a 2/1 drive and it's running off of the exhaust cam which is 2/1 from the engine then shouldn't the tack be a 4/1 tack?


But what makes you think the original tach drive gearbox would have been 2:1? It could have been 1:1.

#419567 - 02/19/12 3:21 pm Re: Smiths gauge fitment list [Re: Torch2]  
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Torch2 Offline
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so. cal
well, I spun it around and counted the turns, I'll do it again and see if my counting skills have also diminished with age.
I hope I'm wrong because I just bought an RC 126 on eBay.
the RC83 I have says it's a 2/1 drive.

Last edited by Torch2; 02/19/12 3:24 pm.
#419571 - 02/19/12 3:39 pm Re: Smiths gauge fitment list [Re: Torch2]  
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L.A.B. Online content
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Originally Posted By: Torch2
well, I spun it around and counted the turns, I'll do it again and see if my counting skills have also diminished with age.


Yes, but how do you know it's the original?

#420121 - 02/22/12 4:29 am Re: Smiths gauge fitment list [Re: Torch2]  
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lurkingclass Offline
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San Diego
I recently did quite a bit of research on this topic, and based on the Smiths fitment chart/parts list and the various chronometric tachs and drive I've found, here's what I can confirm-

The pre-unit tach drive covers with the cast-in tach drive covers take a 4:1 counterclockwise RC109 or RC1307. I also stumbled on an RN1102/00 small magnetic Smiths tach that's correct for the early Cub with the tach drive- that is also a counterclockwise 4:1 tach and will work on a pre-unit.

The RC 126 is a 2:1 clockwise rotation tach that works with the GP/Race Kit/T100R racing drive that takes the place of the generator.

The RC83 fits Norton Manx and Goldstar, I believe. It's 2:1, but counterclockwise.

There's a good post on the Jockey Journal about this same topic-

http://www.jockeyjournal.com/forum/showthread.php?t=52391&showall=1

Last edited by lurkingclass; 02/22/12 4:40 am.

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