View Full Version : speedo is out
the speddo is not working properly, when its showing 60mph im doing 80, also the milometer is out
is it possible to re-calibrte them?
Sounds like the sprockets have been changed on your bike then (I'd guess, I don't know where a Blade takes the speedo reading from)
I know there are things out there called Speedo Healers, but I'm not sure exactly how they work.
I assume that you are talking about the Blade. If the speedo drive is from the front wheel, the sprockets should not make and difference however if you have a different diameter wheel (larger) then your speedo may well run low. I can't remember if your bike had a 16" wheel as standard or a 17", even then if I recall the profile of the tyre was different so maybe that should not make that much of a difference that you speek of. If the speedo drive is from the gearbox/engine then the sprockets could make a difference as rigor has already stated. As for recallibration, I dunno. Good luck on finding a fix for it.
Just out of curiosity how did you find out? Hopefully not from the boys in blue.
it just felt faster than what it was reading, so i asked zombie jesus how fast he was going.
he was doing 80-90 & i was right behind doing 60-70
also just passed one of thesethings at the side of the road, it said i was doing 31, but the clock said 25
it looks like there is a sensor going to the front sprocket,
right, my bike sprocket is 1 tooth smaller than standard,will it make this much differance? the speedo goes to the front sprocket.
kwak zzr
25-07-07, 10:04 AM
leave it how it is and if the old bill stop ya then tell them to have a go! its not your fault you dont know any difference:)
leave it how it is and if the old bill stop ya then tell them to have a go! its not your fault you dont know any difference:)
i did think about that, but i dont think i would get away with it
If it goes to your front wheel then forget about sprockets and gearing. It's probably like an SV running off 4 magnets passing a sensor. And sounds like one magnet is not working therefore reading 3/4 of truth.
Start learning your 1.33 times tables,
or break off another magnet & learn your 2 times tables,
or get it fixed,
or buy a Veypor to wire in instead http://www.veypor.co.uk/xcart/product.php?productid=16143&cat=261&page=1
If it goes to your front wheel then forget about sprockets and gearing.
or buy a Veypor to wire in instead http://www.veypor.co.uk/xcart/product.php?productid=16143&cat=261&page=1
right, my bike sprocket is 1 tooth smaller than standard,will it make this much differance? the speedo goes to the front sprocket.
:confused:
my sv doesnt have any magnets it has sprokets
Hovis, kind of ignore me I read that it went to your front wheel not as you said front sprocket :roll:
Surprised that 1 tooth would make that much difference, but if it does & in the right direction, then I guess a speedo healer is the way.
Hovis, kind of ignore me I read that it went to your front wheel not as you said front sprocket :roll:
Surprised that 1 tooth would make that much difference, but if it does & in the right direction, then I guess a speedo healer is the way.
i personally dont think that 1 tooth will make that much differance.
also the clocks are not digital.
a freind said that the clock my have lost callibration?
I think you can get 2 different types of speedo healer mechanical or electrical. Although you may have analogue clocks, the signal to them could be digital ???
my sv doesnt have any magnets it has sprokets
Pointies measure from the gearbox.
MeridiaNx
25-07-07, 12:41 PM
Pointies measure from the gearbox.
Do they? I'm sure I've read on here that they take it from the front wheel, some people were asking if they'd need to do something to sort the speedo once they change sprockets and the answer seemed to be no for the magnet reason.
I don't know myself mind, just thought I'd read different. Would be useful to know definitively because I just went 15/46 from 15/44 standard on my K3 S and thought my speedo was still fine. Better get it sorted if it's not reading correctly now though.
Pointies measure from the gearbox.
Do they? I'm sure I've read on here that they take it from the front wheel, some people were asking if they'd need to do something to sort the speedo once they change sprockets and the answer seemed to be no for the magnet reason.
I don't know myself mind, just thought I'd read different. Would be useful to know definitively because I just went 15/46 from 15/44 standard on my K3 S and thought my speedo was still fine. Better get it sorted if it's not reading correctly now though.
At the time of writing I was sure I read on here that they take from the gearbox, you concerned me and I checked - I'm wrong. It's detailed under the electrical section of the workshop manual (section 8-38 ).
However the Honda uses a long knotted string that you drop over the side and count the knots that pass through your fingers for 30 seconds.:D
I think you can get 2 different types of speedo healer mechanical or electrical. Although you may have analogue clocks, the signal to them could be digital ???
how do they work?
would it not be eaiser to get new clocks?
Mine goes into the crankcase - your's is on the front sproket cover, should be a 16tooth sprocket.
I don't know if simply getting a UK sensor would work - not sure how the bike's 'brain' translates the information though.
where is the brain? what if i was to get a new clock
where is the brain?
Now there's a question I asked of many things, for a long time! ;)
You'd think that a UK clock and UK sensor would read 'true' - or an import clock and import sensor - but that's probably far too straight forward to actually be true. :rolleyes:
Is it a 16 tooth sprocket?
yes 16f 42b
dunno if this helps but the clock goes up in 20's
20.40.60 etc
Pointies measure from the gearbox.
No,
They measure on the front wheel. The sensor is the little black box with the cable going to the clocks:batman:
That is odd - mine goes up in 10's, as do all the ones I can see from flicking through the Haynes manual.
This is the problem with older bikes that have possibly been down the road a few times - each progressive owner is generally less concerned with replacing parts exactly and more likely to just 'get something that works'.
The clocks could have been changed, speedo sensor changed - you just don't know unless you do it yourself.
I don't even know if just changing the speedo assembly itself will help - as I don't know what translates the data received from the sensor - the assembly or something else in the circuits behind it. I'm at a loss there I'm afraid.
The sensor is obviously working if a speed is showing.
So it's either telling it the wrong speed at one end or reading the data wrong at the other.
So logic would have it that you swap one bit of electrical/sensitive/jiggerypokery at one end and leave the other alone - see if that works and then swap the other end as well if it doesn't.
Um - I only know how to hit things with hammers - there's bound to be someone out there who knows how hard to hit it. ;)
Goes up in 20's? what KMPH? or MPH?
When I bought my current bike (CBR600F) as it was a parallel import it had kph clocks, I took it to a local garage (http://www.autosafegroup.demon.co.uk/bikes.html) who sent the clocks away to be recallibrated, got them back and hey presto they had a mph dial and read correctly. Was about £100 which included removing and re-fitting the clocks.
Greg
Pointies measure from the gearbox.
whats the front wheel speedo drive for on the left of the front wheel is it just mine or has anyone else got a speedo drive on the front wheel
arenalife
26-07-07, 10:27 AM
If it is measured at the gearbox/engine then a smaller front sprocket would make it read faster than you were going, not slower.
whats the front wheel speedo drive for on the left of the front wheel is it just mine or has anyone else got a speedo drive on the front wheel
Mogs has already corrected himself.
Yup mine is front wheel
northwind
26-07-07, 04:16 PM
I'd look at speedo healers myself... Easier than trying to diagnore the actual fault, though it's a bit bodgey. I don't like electrical diagnosis work though, so that's maybe me taking the easy way out.
Know nothing about how an SV's speedo is fed/works but ....
i did think about that, but i dont think i would get away with it
Nope, you are responsible for the speed you are doing, if the clocks wrong (reading low) the police wouldn't care, you are still speeding :(
Clocks reading high are normal, not sure if tested on MOTs but a clock should not read low at 30mph but can read slightly high
sorted
the clocks were mph & the sender was Kmph, so i have just fitted a mph sender
wooooo-hooooooo
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