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Jun 14th, 2026
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Joined: Feb 2016
Posts: 8,662 Likes: 408
Needs to Get Out More!
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Needs to Get Out More!
Joined: Feb 2016
Posts: 8,662 Likes: 408 |
Sadly mine under reads by c 10%. MMC say it is legal, hence my GPS speedo. I know the GPS has faults but that combined with rpm & gearing is helpful Whoever at MMC said yours was legal is talking through his ar*e. Selective hearing may have interpreted the 10% as over read though.
Richard
2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone
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Joined: Jul 2007
Posts: 27,805 Likes: 749
Member of the Inner Circle
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Member of the Inner Circle
Joined: Jul 2007
Posts: 27,805 Likes: 749 |
I double checked with the dealer Richard even saying when indicating 70 the speed is 77.
JohnV6
2022 CX Plus Four
2025 Renault Scenic Alpine etech "Yvette"
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Joined: Jul 2007
Posts: 28,892 Likes: 350
Salty Sea Dog Member of the Inner Circle
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Salty Sea Dog Member of the Inner Circle
Joined: Jul 2007
Posts: 28,892 Likes: 350 |
Sadly mine under reads by c 10%. MMC say it is legal, hence my GPS speedo. I know the GPS has faults but that combined with rpm & gearing is helpful Whoever at MMC said yours was legal is talking through his ar*e. Selective hearing may have interpreted the 10% as over read though. Pretty much what I said at the time, too 
Graham (G4FUJ)
Sold L44FOR 4/4 Giallo Fly
'11 MINI Countryman Cooper D All4
'90 LR 90 SW
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Joined: Nov 2015
Posts: 8,667 Likes: 489
Just barreling along Needs to Get Out More!
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Just barreling along Needs to Get Out More!
Joined: Nov 2015
Posts: 8,667 Likes: 489 |
I double checked with the dealer Richard even saying when indicating 70 the speed is 77. Perhaps it's that special carlos fandango anti-revhang ECU you've got 
Jon M
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Joined: Aug 2017
Posts: 730 Likes: 58
Talk Morgan Regular
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Talk Morgan Regular
Joined: Aug 2017
Posts: 730 Likes: 58 |
Its the Morgan way! When i start off my speedo needle goes up and down like a yoyo. Above 20 miles it does settle down.
Navy Dave
1976 Morgan 4/4
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Joined: Jul 2007
Posts: 28,892 Likes: 350
Salty Sea Dog Member of the Inner Circle
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Salty Sea Dog Member of the Inner Circle
Joined: Jul 2007
Posts: 28,892 Likes: 350 |
Mine's the other way around. Rock steady and pretty accurate for the first 5 to 10 miles, then gradually starts to jump around as the miles go up...
Graham (G4FUJ)
Sold L44FOR 4/4 Giallo Fly
'11 MINI Countryman Cooper D All4
'90 LR 90 SW
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Joined: Jun 2015
Posts: 2,085 Likes: 69
Talk Morgan Expert
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Talk Morgan Expert
Joined: Jun 2015
Posts: 2,085 Likes: 69 |
Its the Morgan way! When i start off my speedo needle goes up and down like a yoyo. Above 20 miles it does settle down. Jittery mechanical speedos: possibly indicating that the inner flexi-cable is dry or has loose strands catching on the outer. May be worth withdrawing, inspecting and lubricating before it breaks?
Doug
2011 Plus 4 in Rich Maroon
1972 750 “ComDom” sprinter
1958 Triton 650
1992 Triumph Trophy 900
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