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Speedometer reading incorrectly

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Speedometer reading incorrectly

Postby TV200MET » Sun Mar 17, 2019 9:47 pm

Is there anywhere or anyone that I can send my speedometer to, to get it calibrated.
Checked against a gps Speedo that I strapped to my scooter, reading 8 to 10 mph out, slower.
Steady reading with no needle bounce.
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Re: Speedometer reading incorrectly

Postby Fast n Furious » Sun Mar 17, 2019 11:20 pm

The only way I know to adjust these is to hold the spindle with a fine pair of snipe noses pliers, carefully pull the needle off its spindle, move it around a little to where you think it needs to be and place it back on.
Don't expect them to be accurate throughout the clock range thou.... They never were that good.
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Re: Speedometer reading incorrectly

Postby Knowledge » Mon Mar 18, 2019 3:28 pm

I have long since given up on traditional Lambretta speedos.

The SIP speedo with magnetic pick-up can be calibrated to perform well, or many people use Garmin GPS strapped to the handlebars as the full-time alternative to the original.

Sorry if the answer disappoints, especially if you were looking for an authentic speedo to perform accurately.
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Re: Speedometer reading incorrectly

Postby Toddy » Tue Mar 19, 2019 8:11 am

TV200MET wrote:Is there anywhere or anyone that I can send my speedometer to, to get it calibrated.
Checked against a gps Speedo that I strapped to my scooter, reading 8 to 10 mph out, slower.
Steady reading with no needle bounce.


Jem booth repaired and calibrated one for me excellent job
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Re: Speedometer reading incorrectly

Postby TV200MET » Fri Mar 22, 2019 11:07 pm

Are there any contact details you can give me for jem booth
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Re: Speedometer reading incorrectly

Postby Toddy » Fri Mar 22, 2019 11:12 pm

TV200MET wrote:Are there any contact details you can give me for jem booth


Pm sent
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Re: Speedometer reading incorrectly

Postby citydaz » Tue Jun 25, 2019 9:14 pm

On the subject of incorrect speedometers i have noticed that the difference between the reading on my GPS and that on hire cars i use regularly for work can vary between 2 mph to 6 mph, and that the gap changes at different speeds. The 6mph difference was on a jaguar.
What chance do we have on 40 year old scoots!
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Re: Speedometer reading incorrectly

Postby rossclark » Tue Jun 25, 2019 9:36 pm

Cars are always fast on the speedo
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Re: Speedometer reading incorrectly

Postby Tractorman » Wed Jun 26, 2019 9:13 am

Toddy wrote:
TV200MET wrote:Is there anywhere or anyone that I can send my speedometer to, to get it calibrated.
Checked against a gps Speedo that I strapped to my scooter, reading 8 to 10 mph out, slower.
Steady reading with no needle bounce.


Jem booth repaired and calibrated one for me excellent job


I watched him do one of mine. He uses an electric motor that he has worked out the speed of and connects it to the speedo. Then adjusts the needle as rossclark suggests.
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Re: Speedometer reading incorrectly

Postby citydaz » Wed Jun 26, 2019 7:19 pm

rossclark wrote:Cars are always fast on the speedo


Yes, i know by law they have to be, but i was really surprised by how much.
That explains why so many cars overtake me when im doing the mandatory 40mph average speed on the A14!
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Re: Speedometer reading incorrectly

Postby Fast n Furious » Wed Jun 26, 2019 9:59 pm

Speedo's naturally become more and more inaccurate with respect to tyre wear.
Remember the chav that fitted low profile tyres to his Corsa and it instantly went 10mph faster. Somebody got good value that day eh? :lol: :lol: :lol:
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Re: Speedometer reading incorrectly

Postby ULC Soulagent » Thu Jun 27, 2019 11:17 am

rossclark wrote:Cars are always fast on the speedo

Most car speedo under read :shock: so say they are doing 50mph when in fact they are actually doing 46/47 mph. I know this as when I’m doing 50 mph in my truck which is calibrated I’ll sail on by :lol: but most frustrating when they hog the middle lane overtaking nothing
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Re: Speedometer reading incorrectly

Postby piskie » Thu Jun 27, 2019 11:19 am

Speak to jen booth hes your man for keys and traditional speedos that work correctly
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