The beemer final has a working Speedo again

Buzzin along the M4 amd noting the respective readings from the speedo
and the GPS takes about half a second. Calculator (or slide rule if
handy) to work out the new calibration diameter.

99.99% of riders would not have that kind of riding experience eheh

Early 90's GPS (both equipment and intentional tweaking by US
military) would have dubious accuracy compared with contemporary
readings.

So you cross-check against a GPS after all. And if you find the speed
readings differ? Which do you believe is _more_ accurate? You would
recalibrate again if the readings varied?

You would save 3 minutes, petrol and a piece of chalk by just running
a tape measure from axle ground and using that figure as your starting
point then GPS to finesse the calibration at actual road speeds.

 

with the usual maths applied to get the diameter of course...

 

I don't even know where the M4 is. I am sure they want money from you
to ride on the M4, too! :-(

That is, of course, correct, but what the US military inspired diddling
didn't stuff up was speed over the ground, which, under the right
circumstances, was pretty well OK.

I'd certainly think about what,when and where.

GPSs are not infallible, nor are they absolutely accurate under all
circumstances.

I dunno if this is still a problem with GPSs, but, in the early days,
especially here in Oz, you could run out of good satellites for them to
talk to, and you'd occasionally get really stupid numbers as SoG.

<blank look> what petrol?

I prefer to roll the bike forwards, with me on it, for two full
revolutions of the front wheel, then measure, with the obvious divide by
two.... no calculator required.

I used to do this twice, and average results, but, since I have had
Sigmas for a while, I kinda know what numbers I should be seeing, and
any slight difference is probably down to tyre changes.

Anyway, I have an inherent distrust of π. ;-)

regards,
CrazyCam

 

Well I rode the bike to Sofala and back during the weekend and the
speepo is still working..... kinda ..... most of the time.

Maybe someone can work this out for me. When I first started on the
ride, the speedo was working until about 20 kms into the trip where I
noticed the speedo was indicating about half my actual speed. Further
into the trip the speedo stopped working. At this point, I figured my
attempted fixes had failed and the dodgy solder joints in the speedo
unit must of failed.

Further into the trip, on the open road, I decided to test the bikes
horns as I had done some repairs on them as well but forgot to
previously test them. Three hits of the horn and the speedo sprung
into life and was reading the correct speed, well within 5ish kms of
it. I was thinking that it was merely a coincidence. That was until I
stopped at my first rest point. When I rode off again the speedo
wasn't working again. Hit the horn again and the speedo sprung back
into life again (it did it after the next stop as well). The next day
the speedo was more consistent but occasionally would start reading
about half the speed to what I was doing. Each time I hit the horn,
the speedo would start indicating correctly again. I also found that
hitting the horn once was inadequate but pressing it three times
seemed to work each time.

One of the riders I was with mentioned that it could be a bad earth
due to the beemer having a common earth..... can anyone add to this,
or offer another sugestions to why this is happening.

On a totally different subject, my lovely wife mentioned on friday
night that she was crunching the numbers and feels that come
june/july, I may be able to get a new bike Has any one here riden
a Moto Guzzi Breva 750? What did you think?
__


Cheers
The Happy Drunk
K100RT

 

Is your headlight wavering, going dull and bright?
If so; it's your starter-motor brushes. (Thanks Al Pennykid)

 

That's where you and Barack Obama differ:


(No it's not Rick Astley)

 

In aus.motorcycles on Mon, 16 Mar 2009 16:58:36 +1100

I haven't, but the people who have say it's nippy and enjoyable.

You could ask for some pointers on the forum at guzzitech.com too.

The Breva 750 has been around for a while, there's 2nd hand examples
with good bits around.

Else consider the V7 classic which is the same motor but in a very
versatile package, make it what you want it to be!

Zebee

 

Why would the early GPSs be any less accurate than modern ones?
Taking selective availability out of the equation, because it was a
function of the transmitter, not the receiver, what has changed?
Processor speed might be improved now, which would allow for faster
calculations (but given that the satellite information being is
transmitted at a mere 50bps it's not like the unit is going to be
buffering loads of data). Why would the results of the positionnig
calculations be any different?

Nev..
'07 XB12X
'08 DL1000K8

 

I haven't noticed, but I will have a closer look tomorrow

Cheers
__


Cheers
The Happy Drunk
K100RT

 

How *can* you trust an irrational number ?

JL

 

From what I've already read, it seems to fit all my needs ....... I
just need the money and to find out if it fits me
__


Cheers
The Happy Drunk
K100RT

 

[applause]

 

In aus.motorcycles on Mon, 16 Mar 2009 21:21:44 +1100

HUnt down your local Guzzi club - should be able to find one there to
talk about and sit on.

Start at http://www.motoguzziclubqld.org/ and check the links section
if you aren't in Qld.

Zebee

 

Huh? Are you relying on your starter-motor brushes for an earth return
or something?

Theo

 

Yep. It's wierd but it's a simple way of taking your headlight and
the rest of the ancilliary load out of circuit when you engage the
starter-motor.
I thought Al was smoking canetoads when he explained it here but it
happened on my K75 so I'm now a spreader of the word......

 

Yep. It's wierd but it's a simple way of taking your headlight and
the rest of the ancilliary load out of circuit when you engage the
starter-motor.
I thought Al was smoking canetoads when he explained it here but it
happened on my K75 so I'm now a spreader of the word......
--
Clem


Common knowledge amongst the Beemerphile

..

Boxer

 

OK, I can dig that. The Guzzi headlight is not on unless the engine is
running. But isn't that eventually going to hurt the starter motor
commutator?

Theo
Bloody weird Germans.

 

Never claiming as such...everything has inaccuracies, except.. Of
course, speed cameras are infallible...

Much less a problem...GPS chipsets are significantly more sensitive,
along with the inbuilt firmware/smarts that discounts erroneous
readings.

Old GPS would be lucky to get a fix under a damp/wet forest
canopy..contemporary ones can get a fix even in a plane...window seat
preferable. The GPS in my N82 will casually get a fix, even indoors..
5 or more satellites no probs. Outdoors..acquiring 9 or more is not
unusual.

The chipsets have really developed in the past 3 years SIRFII >
SIRFIII and my fav MTK chipsets. (eg Qstarz). The phone GPS
performance is not far behind the MTK's. I dont use dedicated GPS
devices but certainly performance compared with even 3-4 years ago is
improved. My ancient circa-mid90's unit needed clear sky and several
minutes just to get a warm fix.

Oh I thought you were rolling down the hill to get multiple rotations
and reduce measurement error.

 

In aus.motorcycles on Mon, 16 Mar 2009 18:54:10 -0700 (PDT)

The running lights are, but don't draw much.

Mind you, I don't understand why there are running lights *and* no
headlight switch.

I'm rather tempted to fit a headlight switch if I could work out where
and how.

Zebee

 

In a sense you are right.

Once the deliberate "fuzzying' was removed, they were pretty much as
accurate as the modern ones, except, in the early '90s there were not as
many satellites to listen to.

They were also, typically, much less user friendly so you actually had
to understand a bit about navigation.

regards,
CrazyCam