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Old 11-06-2012, 03:12 AM   #11 (permalink)
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Speedo problem again

Hi Kit, if the speedo shows speed when turning backwards, I suppose that the sheet metal part with the 2 teeth in the frontwheel could be damaged too.
Juergen
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Old 11-06-2012, 03:15 PM   #12 (permalink)
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Quote:
Originally Posted by KitNYC View Post
Vielen dank, Juergen! I'll be in touch if it tests bad.

Thanks, thap8riot. I just don't understand how the sensor could've been damaged, as it's been several months and thousands of miles since I've touched the front wheel.

Also, here's an additional data point: the speedo registers moving backward just as it always has; it's only moving forward that's glitchy.

Cheers,
-Kit
I don't remember how long mine took to go bad. I know that the 2 teeth were bent and not in the magnet slots but were still turning the magnet. It took a while for the pressure to crack the magnet. Again, I don't remember how long that took, but it may have been several weeks and 1000 or more miles. Let us know what you find.
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Old 11-10-2012, 10:10 PM   #13 (permalink)
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Well, this seems to be why my speedo was erratic:



Note that the edges of the cracks obviously used to line up, but are much too worn to do so any more. I've dressed the driven edges with a file until I can spare the cash for one of Juergen's alloy/neodymium rings; it works for the moment.

Cheers,
-Kit
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Old 11-23-2012, 09:10 PM   #14 (permalink)
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Well, dressing the edges of the magnet with a file worked for about 50 miles.

I got the part from Germany today and it worked great, for six miles.

Time to look at the drive ring, I guess...
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Old 11-24-2012, 08:26 AM   #15 (permalink)
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Did you put grease to the ring from all sides?
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Old 11-24-2012, 02:42 PM   #16 (permalink)
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Yes, lots of grease. I'm about to go pull it apart again; I'll try to get some pics as well.

Cheers,
-Kit
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Old 11-24-2012, 05:01 PM   #17 (permalink)
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Greasy speedo ring:



Drive ring in hub:


Drive ring out of hub and cleaned up:


More drive ring:


Drive ring straightened, drive edges dressed w/ file:


The new magnet ring is locked up tight inside the sender housing. It will not move.
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Old 11-25-2012, 08:30 AM   #18 (permalink)
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Please take a photo from the cleaned ring in the housing. I sold more than 50 of them in 2 years and nobody mentioned any probs, so I am very interested in a solution and to find out the reason. Can you move the ring with force?
Juergen
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Old 11-25-2012, 06:07 PM   #19 (permalink)
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Here are some pics of the magnet ring with the grease removed:











I used penetrating oil and this setup to try to move it; it does not move.



Currently riding with the drive ring removed.
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Old 11-26-2012, 03:15 AM   #20 (permalink)
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It seems, that the drive ring has overrun the grooves in the magnet ring and deformed it. I think, the straightened drive ring will work right with a new magnet ring. I'll send a new one for free.
Juergen
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