Wildguzzi.com
General Category => General Discussion => Topic started by: Fireflyr on February 09, 2017, 07:04:27 PM
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I have a '77 T3 with a '75 instrument/dash installed. The speedometer is way off, reads 100 mph when going 65 mph from what I remember. Is there a difference in internal gearing between the two years or should they work? The needle seems to jump around a lot too. Any help would be appreciated and no, I don't have the T3 gauges.
(http://i230.photobucket.com/albums/ee191/fireflyr_photos/IMG_1424_zpsmfrpu6lg.jpg)
(http://i230.photobucket.com/albums/ee191/fireflyr_photos/IMG_1061_zpsvzbldmyz.jpg)
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(http://thumb.ibb.co/cWXR1F/P9190001.jpg) (http://ibb.co/cWXR1F)
I have a '76 T-3 with a speedo that looks very much like yours .
When I first got it , the needle swung wildly and averaged a reading about 10 + mph fast .
I sent my instruments to member Wirespokes for cleaning and lubrication , and got them back reading with a steady needle and the speedometer calibrated very close . ( speedo indicates 70 at 67mph ) Cost was very reasonable .
When an instrument needle swings wildly , it is asking to be serviced . If you wait til something breaks , it will be much more expensive to remedy ]
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The tach arrived reading about 2k . Turned it upside down and gave a light tap , and it stops on the peg .
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Thanks Unclepete, I sent him a PM. I'd hate to break anything.
Pat
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I'm still learning the ins and outs of Guzzi gearing and how the speedometers relate to all that.
i'd maybe have you do a check involving counting the number of turns the speedo cable makes over a distance or 1/100th of a mile.
On second thought, I've worked on my own T3, so can double check and compare to yours. I'd assume your 77 would have the same gearing. And then I could determine if the T speedometer is geared right for your bike.
I also think Guzziology has that data.
Another question - does the odometer read correctly? Over a ten mile stretch, or even a 100 - is it accurate?