The variety of speedometers fitted to the MGB is a common source of confusion, especially in relation to the fairly common practise of swapping O/D and fully synchronized transmissions into MGBs that didn't originally have them. This will consequently cause the speedometer and odometer to read too high or too low, not an ideal situation.
- Smiths Chronometric Speedometer Serial Numbers List
- Smiths Chronometric Speedometer Serial Numbers List
'Revs' in the table below referrs to the turns-per-mile (TPM) the speedo expects to receive from the transmission via the speedometer cable. The TPM of your speedo should be printed somewhere on the face, along with a serial number.
- Jan 31, 2009 I have been researching and cannot find a reference for Smiths chronmetric speedo's or and instruments concerning what anything stands for. As an example, most if not all of the Triumph numbers for 1940's through 1950's models for big twins end with an L. Such as S467/99/L. I am looking at a speedo that is S467/163/N.
- Feb 26, 2020 Original Smiths Speedometer Numbers: 5 inch dia 150 mph speedo S515/L 5 inch dia 240 kph speedo S515K/L Series D 3 inch 150 mph S576/L Series D 3 inch 240 kph S 576K/L Series C 3 inch 120 mph S433/3/L Series C 3 inch 180 kph S433/7/L. Doug Wood 11/24/01.
- From 1964 onwards most SMITHS motorycycle instruments were of the Magnetic Movement type and can be identified by having SSM (speedometer) or RSM ( rev-counter ) at the begining of the part number on the dial face.
Any variation in tire size from original specifications will of course also have an effect on the accuracy of your speedometer. See the discussion on tires and tire sizes in the Service section of the Tech Library on this website for more information on this topic.
Can anyone out there tell me what Smiths speedo I should be running on my Matchless 1950 G80S? The bike was an export model to Australia. I would like to know what the serial number is. I am certain that the dial should be showing 120 mph for this model. Please have a look at your machine and drop me a quick line.
The NAMGBR also has a cross reference table from car numbers to speedometer serial numbers by Orin Harding. [Ed. Note- this link seems to have gone MIA, so I've duplicated the table below.] Adobe after effects free full version mac osx download.
Iclone 7 free full. download. KMR reports that if you have a setup that doesn't correlate to any existing speedometer type, Nisonger can put a new faceplate on your speedometer, and recalibrate that way. Check the Directory section of this website to find a list of companies that provide Smiths and Jaeger instrument servicing.
Tooth count (transmission):
- Overdrive - 21
- Normal - 27
Smiths Chronometric Speedometer Serial Numbers List
Thanks to Bruce Mills for scanning and submitting in this chart - it's a lot more complete than the chart I was building!
MGB Smiths Speedometer Range and Turns-per-mile (Revs) Reference Chart
Smiths Chronometric Speedometer Serial Numbers List
MGB Speedometer Cross Reference Chart
by Orin Harding, NAMGBR
The information displayed here is from MGB Driver, the MG Mailing List, on the Internet, or other sources. The North American MGB Register assumes no liability for the accuracy, safety, or legality of these contributions. Any opinions expressed here are those of the contributors and do not necessarily reflect the opinions or policies of the North American MGB Register.
Start End Car # Car # | Part No. | Speedo S/N | M/KPH | Trans | Notes: |
---|---|---|---|---|---|
101 - 138400 | NotGermany | ||||
BHA 4478 | 6125/04 | MPH | STD | ||
BHA 4478 | 6124/04A | MPH | STD | ||
BHA 4478 | 6124/00 | MPH | STD | ||
BHA 4479 | 6125/05 | KPH | STD | ||
BHA 4479 | 6125/05A | KPH | STD | ||
BHA 4479 | 6144/01 | KPH | STD | ||
BHA 4480 | 6125/06 | MPH | O/D | ||
BHA 4480 | 6125/06A | MPH | O/D | ||
BHA 4480 | 6144/02 | MPH | O/D | ||
BHA 4481 | 6125/07 | KPH | O/D | ||
BHA 4481 | 6125/07A | KPH | O/D | ||
BHA 4481 | 6144/03 | KPH | O/D | ||
101 - 138400 | Germany | ||||
BHA 4574 | 6144/05 | MPH | Tire size 560-14 | ||
BHA 4636 | 6144/15 | KPH | Tire size 560-14 | ||
BHA 4637 | 6144/13 | KPH | Tire size 155-14 | ||
BHA 4638 | 6144/14 | KPH | Tire size 165-14 | ||
138401 - 153877 | Canada | ||||
138401 - 332925 | Not USA, Sweden, Germany, orV8 | ||||
BHA 4707 | 6144/20 | MPH | STD | ||
BHA 4709 | 6144/21 | KPH | STD | ||
BHA 4812 | 6144/23 | MPH | O/D | ||
BHA 4813 | 6144/24 | KPH | O/D | ||
138401 - 158230 | Not USA, Sweden, Germany, orV8 | ||||
BHA 4707 | 6144/20 | MPH | Auto | ||
BHA 4709 | 6144/21 | KPH | Auto | ||
158231 - 328800 | Not USA, Sweden, Germany, orV8 | ||||
BHA 4868 | 6144/28 | MPH | Auto | ||
BHA 4869 | 6144/29 | KPH | Auto | ||
332395 - 361000 | Market Unknown | ||||
BHA 5279 | 6144/20BS | MPH | STD | ||
BHA 5280 | 6144/21BS | KPH | STD | ||
BHA 5281 | 6144/23BS | MPH | O/D | ||
BHA 5282 | 6144/24BS | KPH | O/D | ||
360301 - 410350 | Market Unkown | ||||
BHA 5339 | 5230/13 | MPH | |||
BHA 5340 | 5230/14 | KPH | |||
187211 - 258000 | Sweden & Germany | ||||
BHA 4924 | 5227/20 | KPH | STD | ||
BHA 4925 | 5227/22 | KPH | O/D | ||
BHA 4926 | 5227/24 | KPH | Auto | ||
258001 - 410000 | Sweden & Germany | ||||
BHA 5087 | 5231/08 | KPH | O/D | ||
BHA 5164 | 5231/95 | KPH | O/D | ||
138401 - 2580000 | USA, USA for Germany &Canada | ||||
37H 3766 | 5226/05 | MPH | STD | ||
37H 3766 | 5226/03 | MPH | STD | ||
37H 3766 | 5227/07 | MPH | STD | ||
37H 3768 | 5226/08 | MPH | O/D | ||
37H 3778 | 5227/12 | MPH | O/D | ||
37H 4180 | 5227/16 | MPH | Auto | ||
258001 - 282419 | USA, USA for Germany &Canada | ||||
BHA 5084 | 5231/00 | MPH | STD | ||
BHA 5086 | 5231/04 | MPH | O/D | ||
282420 - 410000 | USA, USA for Germany &Canada | ||||
BHA 5161 | 5230/065 | MPH | STD | ||
BHA 5163 | 5230/085 | MPH | O/D | ||
BHA 5210 | 5230/11S | MPH | V8 (Except police) | ||
Change point unknown, but after car # 410000 | |||||
AAU 3035 | 5234/00 | MPH | RHD | ||
AAU 3036 | Z 65465 | MPH | RHD Police | ||
AAU 3027 | 5373/00 | MPH | LHD |