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  #1  
Old 27th April 2008
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flskevin flskevin is offline
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Default Unique Speedo Problem

So last thursday morning my speedometer decided to stop working. But it's a little peculiar...

The unit is getting power. The backlight is working, the odometer comes on. The speedo needle jumps up like normal. But when I go forward, nothing. The odometer won't count miles either.

Usually it's a loose plug under the seat. But that kills the power to the entire unit. I checked all the plugs & connections and everything seems fine.

I'm guessing that it's a loose wire from the sending unit or maybe a bad sending unit.


Any suggestions?

BTW - One other small but maybe unrelated problem is that my rear turn signals won't auto turn off when I make a turn. (I have a load equalizer on my bike to power the turn signals when I changed them) Is it possible the LE has gone bad and caused both problems?

I am going to take that out and see what happens.
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  #2  
Old 27th April 2008
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Default

Time to check for loose ground........... and dirty or faulty speed sensor down by starter and left of front drive pulley??
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Last edited by xllent01; 3rd May 2008 at 12:37..
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  #3  
Old 3rd May 2008
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Default

Just to update...

After researching the problem I first cleaned the speed sensor to see if that would fix the problem. It didn't but before I replaced it I checked all my wires & connections.

Everything tested okay all my fuses were still good so I decided to get a new sensor. $55 later I installed the new sensor and the speedo is working again.

I think one of the causes for it's demise was using HD syn3 in the primary. Since the sensor works by being magnetic it had some metal flakes off the gears and messed it up over time.

After some more research I decided to switch to Mobil 1 syn 75/90 gear oil and see if it shifts and runs smoother.
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Old 3rd May 2008
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Speed Sensor
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Old 3rd May 2008
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Default

Those sensors are magnetic for a reason..........it was prolly on it's way out regaurdless of what oil you run....... those little parts do fail.....
even on a 8-9 yr old bike........... glad you fixed the problem!!
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  #6  
Old 3rd May 2008
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I think running gear oil in your primary is a mistake. I'm not a big fan of most HD fluids, but their primary oil is pretty decent stuff.
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  #7  
Old 3rd May 2008
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Default

Quote:
Originally Posted by Horse View Post
I think running gear oil in your primary is a mistake. I'm not a big fan of most HD fluids, but their primary oil is pretty decent stuff.


I have done a lot of research on this before I made my decision.


Besides how can it be a mistake to switch out oil that is made for the motor/primary for an extra high performance oil designed for a specific purpose?

My experience using HD sny 3 has not been too good. It was time to find something better.
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