Old 25th July 2019, 05:05 PM #1
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Smiths Speedo Rebuild

Hi Lads,

Anybody in Ireland repairing Smiths speedo's? It's off a 1975 Norton Commando.

If nobody in Ireland is doing this any recommendations for a UK company?
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Old 25th July 2019, 05:07 PM #2
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Re: Smiths Speedo Rebuild

Saw a guy on " The Motorbike show" in the UK that does it..Think they were restoring an old Goldstar....not cheap but fuck was it a good job....

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Old 26th July 2019, 12:18 AM #3
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Re: Smiths Speedo Rebuild

I done a few .its a lot of hassle . I'd guess in UK yer talking 250 pounds plus carriage for a decent build .if it's not rare replace it with a decent used one
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Old 26th July 2019, 11:46 AM #4
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Re: Smiths Speedo Rebuild

Thanks for the replies.

Checked used/refurbs 350+ sterling if you can find one

The Smith's electronic classic speedo is cheaper and if you want you can remove the speedo cable & gearbox & use a magnet/sensor.

I've looked at various video's on how to rebuild them & the biggest hassle seems to be the bezel, getting it off & putting a new one back on

Might look into doing this myself as a winter project, what's the worse that can happen

I have a cheap nasty aftermarket speedo fitted at the moment, it works but is fugly
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Old 26th July 2019, 01:03 PM #5
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Re: Smiths Speedo Rebuild

An ultrasonic cleaner would do a good job of cleaning the guts of the speedo
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Old 26th July 2019, 02:56 PM #6
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Re: Smiths Speedo Rebuild

Quote:
Originally Posted by Kevin View Post

I've looked at various video's on how to rebuild them & the biggest hassle seems to be the bezel, getting it off & putting a new one back on
:
I've done a few, the trick with the Bezel (assuming you don't have the specialist tool) is to try and get access to a lathe, mount the clock in a chuck and fashion a tool (a blunt HSS cutting tool is ideal) to press against the bezel, you can then "fold" the bezel onto the clock, obviously turning the chuck by hand and not spinning at 2000 rpm !.
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Old 26th July 2019, 02:57 PM #7
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Re: Smiths Speedo Rebuild

Quote:
Originally Posted by Rainman View Post
I've done a few, the trick with the Bezel (assuming you don't have the specialist tool) is to try and get access to a lathe, mount the clock in a chuck and fashion a tool (a blunt HSS cutting tool is ideal) to press against the bezel, you can then "fold" the bezel onto the clock, obviously turning the chuck by hand and not spinning at 2000 rpm !.
Nice!!!
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Old 26th July 2019, 04:36 PM #8
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Re: Smiths Speedo Rebuild

Thanks for the info. I have seen a YouTube clip with a guy using the lathe trick, I don't have a lathe but I know somebody who has one

I'm still trying to figure out how to take the bezel off!! any tips?
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Old 27th July 2019, 08:52 PM #9
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Re: Smiths Speedo Rebuild

Well, there's no going back now!!!

NortonS1.jpg
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Old 29th July 2019, 12:08 PM #10
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Re: Smiths Speedo Rebuild

OK, I had a very close look at the internals of the speedo & everything is in fantastic nick apart from one little bit!!

The picture below shows the part I need, it's made of thin spring steel & engages with the teeth on the first cog on the odometer, it bends out to engage with the teeth.

The part I have broke off just at the bend, so I need a replacement.

Does anybody know of a supplier of Smiths speedo parts?

Thanks
Kevin
IMG_1574a.JPG
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Old 9th August 2019, 12:14 AM #11
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Re: Smiths Speedo Rebuild

Managed to fix the speedo, bezel back on + tested on the bike & is working fine, for the moment!!
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Old 9th August 2019, 12:23 AM #12
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Re: Smiths Speedo Rebuild

Jeasus, fair play. Did ya need to get spare parts and from where?
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Old 9th August 2019, 11:30 AM #13
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Re: Smiths Speedo Rebuild

Got a bezel 'kit' from RGM in the UK. I ended up using the original glass & rubber seals as the new glass & rubber seals were too thick & the bezel was sitting too high.

I cheated putting the bezel on, you can, if you have the patience tap over the lip of the bezel with a brass or nylon drift or if you have access to a lathe make up tools to roll the beed on the bezel.

I used black silicone as I didn't want to break the glass!!! You don't see this as it's on the underside of the speedo/bezel.

A repairer of Smiths speedo's in the UK said I'd get away with the part I had & just bend the remaining spring steel left to catch the teeth of the first trip wheel. As I said it seems to be working OK but for how long I don't know.

None of the repairers of Smiths speedo's on the planet, I contacted at least 15 companies, would sell me parts, they want to hold on to them for their repairs which is fair enough!

I'm looking at eventually replacing the magnetic speedo with a classic Smiths electronic speedo (they look exactly the same). The plan is to remove the mechanical speedo drive + cable & replace it with a sensor.

I have all the bits sussed, just need to start saving:d oh:
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