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speedo not up to speed


illvibetip
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basically, my speedometer doesnt seem to know what my wheels are doing.

Its ok up to 100 kmph (it has km in bigger numbers on the face so I tend to pay more attention to that). After that its doubtful and seems to get stuck around 110/120 kmph.

At first I thought there was something wrong with the engine or it was too windy or something because I couldnt make it go any faster. So I took it into a tunnel (as there doesnt seem to be any wind resistance) and hammered it. I know I must have been going at least around 90/100 mph and the needle/pointer started swinging wildly up and down :? .

I just had my speedo/rpm clocks changed (as I crashed and smashed the casing on the speedo) with second hand ones.

I can easily go back to where i got this done and ask them to sort it out for free.

Truth is, Im trying to get into the habit of fixing things myself because Im a bit green and dont know much about repairs.

Question

Is this an easy job or should I leave this one alone?

(If it is - how do you fix it?)

thanks v.much

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yes, there's an inner cable, which spins,

and an outer sheath, so if the inner isn't firmly

and properly in, at either end, or if the outer is bent/

kinked/damaged/routed wrong, it won't work properly.

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It sounds more like the replacement speedo is knackered to me. If it were the cable then it would likely affect the reading at all speeds rather than @ 100-odd kmh. I remember the old clocks in the fiesta/escort cars, they had the same (common) problem where they wouldn't go show an increase in speed past a certain point.


What bike is it, if it's a 'Eddy current' type speedo then this is almost certainly the problem.

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Well you do have to remove the cable before you look at the speedo, i was hoping he had the common sense to look at that first! :D . The symptons he described though are classic buggered speedo . You can test a speedo by filing square an old drill bit, sticking it in an electric drill on high speed setting, and operating the speedo via the drill.

Edited by Matt Strange
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i was hoping he had the common sense to look at that (the cable) first!

 

hmm... :?

actually, I know very little about bikes/repairs so I wouldnt have known what to 'specifically' check the cable for (eg kinks) if rennie hadnt pointed that out - as a starting point.

If it was a case of my just having 'common sense', i wouldnt have needed to post on this forum because I have been fixing mountain bikes for years. But its not a mountain bike, its a lot more complicated than that.

Hence the fact that I ask for technical advice.

Peace.

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i was hoping he had the common sense to look at that (the cable) first!

 

hmm... :?

actually, I know very little about bikes/repairs so I wouldnt have known what to 'specifically' check the cable for (eg kinks) if rennie hadnt pointed that out - as a starting point.

If it was a case of my just having 'common sense', i wouldnt have needed to post on this forum because I have been fixing mountain bikes for years. But its not a mountain bike, its a lot more complicated than that.

Hence the fact that I ask for technical advice.

Peace.

I suppose i could have written that slightly better, as in 'i was hoping he had the common sense to look at that (the cable) first, following your sound advice Rennie'. You have to take the cable off before you even look at the speedo, so you'd look at that first.....wouldn't you?.


Anyway, yeah thanks for the appreciation of my time giving you sound advice & some insider tips from someone who actually is at least partially trained in fixing motor vehicles! (i finished my mechanic apprenticeship). Gah, 'the internets' and how everyone gets wound up by the slightest little thing.


Ligten up a bit dude, I just might not bother next time! :boxing: :)

Edited by Matt Strange
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