mickabod
Oviraptor
Posts: 3 
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Post by mickabod on Jul 2, 2015 7:00:10 GMT
Hi folks, new member, first thread.
The speedo on my Katana is reading high. At 30mph it shows about 40 and at 70 it shows about 100. The mileometer is reading proportionally high too. Any idea what is going on. Cheers. Mick.
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Post by katana on Jul 2, 2015 7:02:36 GMT
KPH clocks? 62mph is 100kph so close to yours with tolerances! Try a speedo healer.
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mickabod
Oviraptor
Posts: 3
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Post by mickabod on Jul 2, 2015 8:23:08 GMT
Definately a uk spec mph model. I've had it for 31 years. Not had a problem untill this summer when I guessed that it was wrong as I was seeing speeds on the clock that were unrealistic. What or who is a speedo healer?
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Post by jonboy on Jul 2, 2015 10:50:53 GMT
Has anything else changed ? have you perhaps fitted a smaller front wheel ? or even replaced the mechanical drive unit on the front wheel ?
Jonboy
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mickabod
Oviraptor
Posts: 3
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Post by mickabod on Jul 2, 2015 12:29:04 GMT
No nothing replaced at all. I have checked the cable connections and all seems to be ok.
The current cable has been on for probably 10yrs, and the tyre and wheel are original and standard.
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Post by zooma on Jul 2, 2015 12:39:30 GMT
Is the speedo drive unit well lubed? ...
Maybe the gears have worn to the point that they're not meshing together corrrectly and periodically slipping?
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Post by pedda on Jul 2, 2015 16:26:22 GMT
Is the speedo drive unit well lubed? ... Maybe the gears have worn to the point that they're not meshing together corrrectly and periodically slipping? That's the strange thing in this case - that'd make me expect lower reading rather than higher...  |
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Post by zooma on Jul 2, 2015 17:19:53 GMT
That's the strange thing in this case - that'd make me expect lower reading rather than higher... I thought that too but as part of the fault findin' process, still worth a look. 10 years does seem like a very long life-time for a cable of any kind, I would want to pull the inner out just make sure it's as it should be. Speedo drive units are so basic that they rarely give any trouble... so, if the drive and the cable are ok, it's gonna be an internal issue. Isn't there a magnet of some kind used to operate the needle pointer inside a mechanical speedo, wonder if it's become de-magnetised at all? |
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