Speedo problem...

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falcomunky · #1 Post by **falcomunky** » Mon Mar 19, 2007 6:40 am

Anyone else get this?
When decelerating down fer 30 zones, (usually from stoopid speeds and VERY quickly), Ive noticed it takes a second or two fer the speed on the dash to catch up to what the bike is actually doing!

Is the speedo cable on its way out or do 'they all do this'!?!?
Is there a way to clean em up or should I start looking fer a new un?...

FM

Gio · #2 Post by **Gio** » Mon Mar 19, 2007 7:02 am

Could be, I've had 2 cables go that way. Mind you is the cable run off the front wheel or is it a sensor on the engine (ie like a Pan European) if its the later it could be the sensor, and you'll need to replace the whole thing, if the former check the connection at the wheel hub first thats where they normally go (road crud, salt etc)

HTH

Falcopops · #3 Post by **Falcopops** » Mon Mar 19, 2007 8:39 am

Oh mate how much you have to learn. The Falco speedo is driven from a pick up sensing the rear disc bolts.

I've experienced the same problem and I think it is just the computer taking time to figure the speed change. I'm supposing that it needs to sense at least two bolts before it can calculate the speed of the bike and if you're slowing rapidly this is changing at an alarming rate. The refresh on the screen seems to be quite slow.

I don't think there is anything wrong with the bike IIRC most problems have manifested themselves with mental readings or non at all.

I frequently go through speed cameras at 10mph less than the speed limit 'coz of this. The old needle on a dial is much better in this respect.

Moose · #4 Post by **Moose** » Mon Mar 19, 2007 8:48 am

falcomunky wrote:Anyone else get this?
When decelerating down fer 30 zones, (usually from stoopid speeds and VERY quickly), Ive noticed it takes a second or two fer the speed on the dash to catch up to what the bike is actually doing!
Is the speedo cable on its way out or do 'they all do this'!?!?
Is there a way to clean em up or should I start looking fer a new un?...
FM

I think I see the problem!!!

Try leaving the rear wheel on the ground

bigun · #5 Post by **bigun** » Mon Mar 19, 2007 8:49 am

THe speedo is 'damped' a little so it doesn't constantly flick between say 30/31mph et etc. That damping has an effect when accelerating and decelerating and makes the dash display seem a little slow to catch up. Nowt to worry about m8. Only start worrying when it flicks between 30mph and 217mph, thats when its paggered! (I know, I'm on my third sensor! But my v-max says 217mph!

........see silver is fastest!)

Falcopops · #6 Post by **Falcopops** » Mon Mar 19, 2007 8:58 am

bigun wrote:my v-max says 217mph! ........see silver is fastest!)

Proof at last that silver's need to cheat to be the fastest.

Gio · #7 Post by **Gio** » Mon Mar 19, 2007 9:25 am

Falcopops wrote: Oh mate how much you have to learn. The Falco speedo is driven from a pick up sensing the rear disc bolts.

Obviously I have

. Seems a strange setup tho, as it seems to me the rear wheel gets dirtier than any other part of a bike.

HowardQ · #8 Post by **HowardQ** » Mon Mar 19, 2007 1:34 pm

FM you're obviously doin all your braking on the front, (Standard on an Aprilia with a useless rear brake). So when braking really hard, your back wheel is up in the air and still spinning, you'll get a better reading a second or so after the rear wheel touches down!

Then again if you touch the rear brake lightly whilst still in this elevated state you'll show 0 mph pretty quick.

Could also try slowin down for speed limits a bit sooner.

Falcopops · #9 Post by **Falcopops** » Mon Mar 19, 2007 2:03 pm

Gio wrote:Obviously I have . Seems a strange setup tho, as it seems to me the rear wheel gets dirtier than any other part of a bike.

And hence Bigun's frequent replacement regime. Be careful when washing the bike

Handy thing is that you will always know how fast you're wheelies are.

Gio · #10 Post by **Gio** » Mon Mar 19, 2007 2:39 pm

Falcopops wrote:
Gio wrote:Obviously I have . Seems a strange setup tho, as it seems to me the rear wheel gets dirtier than any other part of a bike.
And hence Bigun's frequent replacement regime. Be careful when washing the bike

Handy thing is that you will always know how fast you're wheelies are.

I'm always careful when washing the bike, I'll leave the wheelies to the pro's

D-Rider · #11 Post by **D-Rider** » Mon Mar 19, 2007 3:59 pm

Gio wrote:I'll leave the wheelies to the pro's

Not with a Falco you won't ..... they just happen !

.... there's plenty of fun waiting for you there Gio

Gio · #12 Post by **Gio** » Mon Mar 19, 2007 4:53 pm

D-Rider wrote:
Gio wrote:I'll leave the wheelies to the pro's
Not with a Falco you won't ..... they just happen !

.... there's plenty of fun waiting for you there Gio

They said that when I had the Blackbird, that had 162bhp at the rear wheel, I only ever popped the wheel once and that was cos I had a wet hand and the clutch slipped out.

fastrider · #13 Post by **fastrider** » Mon Mar 19, 2007 8:47 pm

I had my first ever mini-wheelie on the Falco a few years back.

I was on the A1 middle island, Ancaster turnoff waiting for a gap in the
traffic to cross the southbound lane. Saw one and gave it a handfull -
sheeesh

for a few seconds I was wondering why the handle
bars felt funny!!! Shot across the two lanes onto the other side and
realised the front had skipped up and surfed a few inches above the tarmac.

Not much to most on here probs, but hey it was a mini wheelie all the same.
Didn't intend for it to happen it just did

bigun · #14 Post by **bigun** » Mon Mar 19, 2007 9:11 pm

There's a good road up here on alongside the roman wall which is good for wheelies, go through a big dip at about 70 and on the way out in third gear just wind on the throttle and whoop, vertical!! Its a hoot...........scares the sh*t out of my lass everytime!

Samray · #15 Post by **Samray** » Mon Mar 19, 2007 9:28 pm

My most memorable 'unintentional' was accelerating out of a hairpin headed up a Welsh mountain ... couldn't understand for a sec why I couldn't steer away from the cliff edge.

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