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MG Midget and Sprite Technical - 1500 Speedo Under Reading???

My 1978 1500 midget speedo seems to under read the gear box is not the original,does anyone know what size of speedo drive should be fitted to the gearbox?,are they interchangable?also Ive heard that the gearing at the gearbox can altered,can anyone help please?
Thanks
Andy Douglas
AS Douglas

Are you sure that you have the correct speedo fitted? It is not unknown for them to have been replaced with one from a different model of Midget, or even an MGB.
Dave O'Neill 2

Ive no idea if it is the correct speedo,how could I check this?
Andy
AS Douglas

Mine is underreading as well I am only doing 110 when I am flat out when it should be 130!!

Only kidding!!

How do you know it is under reading?
Bob (Robert) Midget Turbo

Check the 'SN' number on the speedo face against this list...

http://www.moss-europe.co.uk/Shop/ViewProducts.aspx?PlateIndexID=1343
Dave O'Neill 2

Andy,
i may be too late with this, but, my 78 1500's speedo has the following:

SNT 6211/12S

and my car alledgedly has the 3.7 diff

HTH
Alan
A Pritchett

A good way to check is with a SatNav

Carl
C Bintcliffe

Just checked my speedo the numbers are SNT 6211 12S the same as Alans I think mine should have a 3.7 diff I need to see if the casing has any ID marks
Thanks For all the help
Andy
AS Douglas

Check the TPS (turns per mile) - usually a figure of around 900 to 1300 on the old Smiths speedos...

I use an MGC speedo in my KMidget with Ford Type-9, and it's reasonably close.

A
Anthony Cutler

This thread was discussed between 22/11/2008 and 27/11/2008

MG Midget and Sprite Technical index

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