The vagueness of veglia....

[Andy_C]

As my bike has a KM/H speedo fitted I fitted a cheap bicycle GPS speedo to it as I hate constantly trying to multiply the reading on the speedo by 0.6 to know how many MPH I am doing in in theory..........

The Veglia speedo is actually out:

Veglia 110K = GPS 60 MPH (Should be 68 MPH)
Veglia 100 K = GPS 50 MPH (Should be 62 MPH)
Veglia 80 K = GPS 40 MPH (Should be 49 MPH)
Veglia 60 K = GPS 30 MPH (Should be 37 MPH)
Veglia 40k = GPS 20 MPH (Should be 25 MPH)
Veglia 20K = GPS 10 MPH (Should be 12MPH)

I know that the GPS speedo is right as when I ride past one of those flashing signs that reads out your speed 30 MPH on the GPS reads 30 MPH on the sign. It is good that the 20, 40, 60, 80, 100 and 110 equate to exact MPH as the GPS speedo reacts a bit slow compared to the Veglia.

I assume that the rev counter is a bit more acurrate.

[Morini Jen]

On the bright side, if you continue to use the GPS speedo you are unlikely to receive a speeding ticket.

Sadly, a lot of motorists see a 50mph sign as a target rather than a limit.

[Andy_C]

Funnily enough I was talking to a motorcycle speed cop a while ago, and said to him that speed limits should be interpreted as a limit and not a target, to which his reply was "right answer"

[Glennh]

I stuck MPH markers at the relevant positions on the face of my Veglia KMH speedometer. It proved to be utterly inaccurate. I too went down the GPS speedo route and purchased a Cycplus G1 device. It cost less than £20. With a home-made adapter it sits perfectly between rev counter and speedo heads and, as per And_C’s results, seems to be spot on accurate according to road sign speed signs.
Furthermore it has a real-time clock and delivers some other interesting stats after an outing.

[3potjohn]

Cycplus gets my vote. Bought one for a bike then another for a different bike. Only gotcha was one is micro USB and the other USB-C. Should have been more diligent. Run time about 25 hrs but auto shutdown after stationary about ten mins. Only charged once or twice so far in quite a while.
No pesky spoke magnet either.Brilliant.

[Galligaskins]

I assume that the rev counter is a bit more acurrate.

I wouldn't bank on it.
After I'd ridden my Morini a while it dawned on me that the correlation between the speedo and tacho wasn't correct.
Sprockets were correct so I downloaded a GPS speedo onto my phone and checked its accuracy against my van and car to be sure it could be trusted.
With the phone GPS on my bike it showed that the speedo was correct within limits (about 5mph fast at 60) so the next suspect was the tacho.
I got a cheapo runtime and tacho device that wraps around the HT lead. Lo and behold, it showed that the Veglia tacho was reading about 1000rpm fast at 5000rpm and 1500rpm fast at 8000rpm. It helps to have the speed in all the gears info which you can find in various road tests. Might be some in the archives on here. I ended up removing the bezel off the tacho and adjusting the pot to get the reading right.
That extra 1500rpm made quite a difference to the top end performance. Not that I use it that much

[Andy_C]

I have a few road tests in a book called Moto Morini 3 1/2 & 500 Performance Portfolio 1974-1984, think that has some RPM / MPH values in it.

I'll take a look.

[Guzziando]

Another vote for Cycplus, but I use the M2. Also bought a nice bracket for it. Got to love AliExpress.

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[MickeyMoto]

Blimey. Firstly, don't trust the speed signs. Secondly, the Vagueliar inaccuracies are good for not getting a speeding ticket. Thirdly, it never bothers me. Fourthly, GPS does not work in tunnels or under trees.

My modern BMW is accurate to within 1 mph, my old Boxer nowhere near. I prefer one with a greater inaccuracy in these days of cameras, over zealous police officers and civilians who want to be police officers in vans who illegally park then speed back to the station with an erec***n after nabbing a few punters doing 30.01. I would be proud to receive a ticket for doing 80 on my Strada.

[3potjohn]

I only got my Cycplus for a clock function, having had Oxford digital clocks, one gained 3 mins a day and the other ran the battery down in short order. The fact that it gives a speed is a bonus.
All because my beemer has a clock and a voltmeter….

[MickeyMoto]

My 40 year old Beemer clock keep perfect time.