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TR25W Replacement Speedo #578793
12/30/14 11:18 pm
12/30/14 11:18 pm
Joined: Jun 2012
Posts: 17
Monterey, CA
S
stugs Offline OP
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stugs  Offline OP
BritBike Forum member
S
Joined: Jun 2012
Posts: 17
Monterey, CA

Hey All,

My speedometer finally bit the dust (SSM2001/02 1600) and since I couldn't find a real Smiths for a price I'm willing to pay, I wanted to purchase a repo. Seems most of the repos are 80mm vs 60mm, so my search isn't quite as easy as I'd hoped.

I can find a few 80 or 100 MPH 60mm speedos, but none list the ratio. Looking through a couple reference sites, the SSM2001 came on plenty of bikes, but I'm not entirely clear if they can be directly swapped. For example, from a Cub.

My backup plan is upsize to an 80mm and use a mount from a BSA B44 or B25

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Re: TR25W Replacement Speedo [Re: stugs] #578806
12/31/14 1:43 am
12/31/14 1:43 am
Joined: Aug 2001
Posts: 157
P
Pat Offline
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Pat  Offline
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P
Joined: Aug 2001
Posts: 157
Going through this right now. Triumphs used a 1.25/1 ratio hub drive and Bsa's use a 2/1 rear hub drive. BUT, you should pull the hub drive off and check your's since they might have used a Bsa unit. It will be marked on the inside ring. I'm going to use a Tri T140 gauge bracket, shiny and just clamps under the fork tube bolt.

Re: TR25W Replacement Speedo [Re: stugs] #578807
12/31/14 2:08 am
12/31/14 2:08 am
Joined: Jun 2002
Posts: 9,536
Scotland
S
Stuart Online content
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Stuart  Online Content
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S
Joined: Jun 2002
Posts: 9,536
Scotland
Hi,

Originally Posted By: stugs
speedometer finally bit the dust

Someone like Nisonger couldn't fix it?

Originally Posted By: stugs
Looking through a couple reference sites, the SSM2001 came on plenty of bikes, but I'm not entirely clear if they can be directly swapped.

Bear in mind though that any original Smiths you buy is likely to need to go to someone like Nisonger for a service?

Originally Posted By: stugs
backup plan is upsize to an 80mm and use a mount from a BSA B44 or B25

The TR25W tacho. is an "80mm" (3"?) so, if the B25 uses a 3" speedo., possibly Meriden's use of a "60mm" speedo. was a small attempt to make the TR25W a bit more than just a re-badged BSA?

The more-expensive ($50-$60?) repos. have been around for at least ten years and appear to be good, restorers I know who've used 'em like 'em. I've only seen the really cheap repos. from India in the last year or so, dunno what their quality's like. Only thing you have to watch with the 'more expensive' repo. speedos. is the trip reset knob is fixed and not in the same position as the Smiths' one. frown First one I used, I fitted in an oif-type rubber mounting and that was fine, last one I tried was in a '69/'70 triple's rubber binnacle and that wasn't even close. frown

Hth.

Regards,

Re: TR25W Replacement Speedo [Re: stugs] #578810
12/31/14 4:05 am
12/31/14 4:05 am
Joined: Jan 2009
Posts: 556
Rotorua, New Zealand
'59 Bonnie Offline
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'59 Bonnie  Offline
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Joined: Jan 2009
Posts: 556
Rotorua, New Zealand
Is this the one you looking for? Here are some spares.

http://www.ebay.com/itm/Triumph-Tr25W-White-Smith-Speedometer-Guage-/261579362297


"We are "motorcyclists" & "historians" our hobby includes the research & preservation of motorcycle history. What we are doing in the research & preservation of iconic bikes is, an important part of its history & value".
Re: TR25W Replacement Speedo [Re: stugs] #578853
12/31/14 1:19 pm
12/31/14 1:19 pm
Joined: Jun 2012
Posts: 17
Monterey, CA
S
stugs Offline OP
BritBike Forum member
stugs  Offline OP
BritBike Forum member
S
Joined: Jun 2012
Posts: 17
Monterey, CA
Thanks for the replies. I did some searching on the forum and it appeared that rebuilding my speedo was going to be close to purchasing a NOS which is about $300. While not horrible, it's overkill for this bike. This is more of a dd vs something I'm planning to restore.

I guess I'm going to go dig through Raber's used parts section and see if I can't find that B44/B25 mount after checking that hub drive. As my speedo said 1600 I assumed it was 2:1, but I should know better than assume these things smile

Thanks all!


Moderated by  John Healy 


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