Green dot Speedo: 190 km h max!

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pierodn

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Green dot Speedo: 190 km h max!


A dear friend has this speedo 190 km/h max.
I have never seen a Commando with a green dot 190 km / h speed max!
May be was fitted on the very early Commando or on the last Atlas?
Ciao
Piero
 
Re: Gree dot Speedo: 190 km h max!

ludwig said:
I think that if you want to use that speedo on a Commando , you will also have to change the gearbox on the rear wheel
( diff. ratio ).
Click to expand...

Why?
 
Re: Gree dot Speedo: 190 km h max!

Thats the equivalent of the old 120 mph speedos.
Not the 150 of the Commando ones.

That 1000 down the bottom on the speedo is important.
Thats the no of turns it does/needs for a mile ??

Interesting.....

What years(s) of N15/P11 got these.
It would only be the very last of them ?
Or replacement speeds for them, perhaps...
 
Re: Gree dot Speedo: 190 km h max!

Rohan said:
Thats the no of turns it does/needs for a mile ??
Click to expand...

As it's Km/h speedo, it's 1000 (cable) turns per kilometre, therefore requires a 2:1 ratio drive gearbox.

Rohan said:
What years(s) of N15/P11 got these.
Click to expand...

Apparently, according to the Smiths list this type, was fitted (in both MPH and Km/h forms) to non-Commando twins (inc. Mercury) manufactured during the '68-'69 period (green blob era).
 
Re: Gree dot Speedo: 190 km h max!

Is it the same 2/1ratio with the Veglia KPH Clock?

J
 
Re: Gree dot Speedo: 190 km h max!

auldblue said:
Is it the same 2/1ratio with the Veglia KPH Clock?
Click to expand...

No, all Commando speedos (MPH and Km/h) use 1.25:1 (15/12) drive ratio.
 
If you want it to read accurately in kph, then fit the 2:1 gearbox at the wheel.

With the original existing 1.25:1 gearbox, the readings will be in mph. When it shows 100 kph, you'll be doing 100 mph. If it showed 190, you'd be doing 190 mph.
 
X-file said:
fit the 2:1 gearbox the readings will be in mph. When it shows 100 kph, you'll be doing 100 mph. If it showed 190, you'd be doing 190 mph.
Click to expand...

Cheers for that x-file, I guess your still running a high temperature don't get your C's mixed up with your F's on the thermometer you might spontaneously combust!
 
I hope you've got this clear, auldblue. You seem to have misquoted me, changing my post in what you quoted.

If you leave the existing 1.25:1 speedo gearbox, it will be fine if you want readings in mph.
The speedo will be showing 100kph, when you are doing 100mph.
 
X-file said:
If you want it to read accurately in kph, then fit the 2:1 gearbox at the wheel.

With the original existing 1.25:1 gearbox, the readings will be in mph.
Click to expand...

The odometer reading would be wrong, however.
 
L.A.B. said:
X-file said:
If you want it to read accurately in kph, then fit the 2:1 gearbox at the wheel.

With the original existing 1.25:1 gearbox, the readings will be in mph.
Click to expand...

The odometer reading would be wrong, however.
Click to expand...
It will be right enough, once you tell yourself it's miles and not kilometres.
 
Sorry X-File , just joshing. This is the speedo and I recon it needs a 1.25 speedo drive for a reading accurate or not.
Green dot Speedo: 190 km h max!


Cheers J
 
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