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Pontlee77
Posted on Tuesday, April 18, 2017 - 10:53 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

A week ago I noticed my speedo was oscillating
Riding at 60 m/h it would fluctuate, going up to 90 or the falling to 40, it's a constant fluctuation,doesent matter the gear or the speed it wont show the speed, what do you suggest, is it the speedo or the sensor on the the engine?.

Thanks
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Hootowl
Posted on Wednesday, April 19, 2017 - 08:44 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I doubt it's the sensor. I can see it dropping signal, but not adding it. Besides, those usually either quit working entirely in a benign sort of way, or they quit working and blow your ignition fuse.
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Natexlh1000
Posted on Wednesday, April 19, 2017 - 09:17 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

If the connection is loose, it could vibrate at a higher frequency than the actual signal I suppose.
Next time it does that, pull in the clutch and allow the engine to idle to see if it stops doing it.
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Akbuell
Posted on Wednesday, April 19, 2017 - 10:29 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

If my X-1 experience is any guide, I would install a new speed sensor. My speedo did something similar, then seemed to cure itself. Much later, it did fail and blow the ign fuse, like Hootowl mentioned.

The service manual suggests checking for a loose connecting screw to the speedo wires at the back of the speedometer. If they are all tight, there is a speedometer performance check that a dealer can do, to confirm the speedometer is functioning correctly.

Hope this helps, Dave
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Pontlee77
Posted on Wednesday, April 19, 2017 - 10:52 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

thanks for the help I'll check it when I get some free time.
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Ratbuell
Posted on Wednesday, April 19, 2017 - 11:42 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

My Ulysses has done that when the sensor gets dirty. Drops and jumps are not unusual when the sensor's magnet gets "incorrect" signals, whether internal problems or metal debris problems.

I've also had mechanical (front wheel speed sensor / cable drive) speedos do that - the cable can bind (speed drop)...then pop loose (speed jump). Then the cable breaks.

"uh...no, officer, actually I DON'T know how fast I was going..."
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Pontlee77
Posted on Thursday, April 20, 2017 - 07:41 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I was wondering if the US speedo clock is different from the euro one as the gears are different: US 27/61 and Euro is 29/55, the speedo or the sensor is different?
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Hootowl
Posted on Friday, April 21, 2017 - 09:23 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Has to be the speedo, or the speedo programming. The sensor just reports the gaps, and those are fixed, with one of the gaps being wider than the others.
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Lakes
Posted on Friday, April 21, 2017 - 06:30 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I think it would be loose connection or ground connection loose. as like has been stated if sensor it would just stop working. as for difference in US gearing to Euro, my M2 is euro but has US gearing & speedo works fine ( just KPH not MPH ) i think would be a programming change but guessing. as pick up in gear box ( loved the old front wheel speedo drives as could change drive ratio to adjust speedo & gearing changes to the bike did not effect speedo.
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Pontlee77
Posted on Friday, April 21, 2017 - 07:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I had a shortish ride today and the speedo worked fine, I will check any how to see if there is any cable loose.
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Harleyelf
Posted on Saturday, April 22, 2017 - 03:12 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Perhaps an auxiliary ground wire to the body of the speedo? Somehow current is being interrupted.
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Pontlee77
Posted on Thursday, April 27, 2017 - 07:25 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Did another ride problem was back so I changed the speedo and put some dielectric grease on the screws, let's see this week end if it works ok, or I need to trace the issue, not that it bothers me much.
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