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Old 05-15-2011, 09:42 PM   #1
Vandals
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Has your TPS sensor gone out on you?

Bike: 2003 Yamaha R1
Miles: 51,397
Battery: New still reading 12v


Last week my bike gave me an error code so i looked it up in the manual and it said check throttle position sensor. It ran fine and eventually the code went away, so I didn't worry about it.

Fast forward 3 days.

I tried to start the bike and it took forever to turn over (like it was cold, but it was 90 outside) Then halfway home from work the bike ran like it had a mind of its own.. throttle on, throttle off, ON ITS OWN!! Gauges flickered on and off, the tach reading was incorrect (it was flipping up and down)


...Now the bike will not start at all. If you turn on the key, it makes its normal sounds from under the seat, fuel pump kicks on, etc. Hit the start button and it makes a BUZZING sound! ..WTF?!


Has anyone ever had this problem with their bike? Is this normal signs of a throttle position sensor going out?
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Old 05-15-2011, 10:12 PM   #2
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if the bike gave you a code then I would replace that sensor ASAP (first)

once you have that done then you can see if there is other problems with it..

My R6 has 3 TPs and I worked on two R6 at home where I had to adjust the TP sensor.

I would start with the main TPS then go from there... (I have heard of this problem before on older R6.. I have an extra at home if you need it but I dont know if it fits.. if the 07 tps fit on yours then you can have it and see if it works..
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Old 05-15-2011, 10:19 PM   #3
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I have an extra TPS sensor from my spare r1 motor, Im in the process of replacing it as we speak.

But how would a TPS problem explain the buzzing noise i get as soon as I hit the starter button?
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Old 05-15-2011, 10:33 PM   #4
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Quote:
Originally Posted by Vandals View Post
I have an extra TPS sensor from my spare r1 motor, Im in the process of replacing it as we speak.

But how would a TPS problem explain the buzzing noise i get as soon as I hit the starter button?
its going to be hard to fix that over the phone.../computer

Fix one problem at it time... you just never know.
I just got done working on mine.. I took this all apart!
wheels, forks, tank, fairings... there is nothing but a motor and a frame..
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Old 05-15-2011, 11:57 PM   #5
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Quote:
Originally Posted by Vandals View Post
Bike: 2003 Yamaha R1
Miles: 51,397
Battery: New still reading 12v


Last week my bike gave me an error code so i looked it up in the manual and it said check throttle position sensor. It ran fine and eventually the code went away, so I didn't worry about it.

Fast forward 3 days.

I tried to start the bike and it took forever to turn over (like it was cold, but it was 90 outside) Then halfway home from work the bike ran like it had a mind of its own.. throttle on, throttle off, ON ITS OWN!! Gauges flickered on and off, the tach reading was incorrect (it was flipping up and down)


...Now the bike will not start at all. If you turn on the key, it makes its normal sounds from under the seat, fuel pump kicks on, etc. Hit the start button and it makes a BUZZING sound! ..WTF?!


Has anyone ever had this problem with their bike? Is this normal signs of a throttle position sensor going out?

Your tps won't cause those issues.

Sounds like a bad /dead battery or loose battery connections.
You posted the battery is new, did you check charging system output when you replaced it?
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Old 05-16-2011, 02:53 AM   #6
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Pat, ive checked the ground wire on the motor, its secure. All battery connections are good and tight. No i did not check the charging system, are you thinking it could be the stator that has crapped out on me? looks like Ill have to pull the stator out of my spare motor and see if that will fix the problem.
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Old 05-16-2011, 03:15 AM   #7
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Check the rectifier first.
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Old 05-16-2011, 03:42 PM   #8
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Could it possibly be the starter soloniod?
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Old 05-16-2011, 04:32 PM   #9
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Check your charging system output first.
Charge the battery and then check system output, it should be above 12.4 volts at idle and above 13 volts.
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Old 05-16-2011, 08:19 PM   #10
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Have u changed the tps yet?
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Old 05-16-2011, 09:48 PM   #11
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Make sure your battery is still reading ~12 volts when you hit the starter. I've had batteries read normal at rest, but as soon as I put them under load, they dropped below 5 volts.
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Old 05-17-2011, 09:58 AM   #12
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Quote:
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Could it possibly be the starter soloniod?
Possibly but make sure your battery is good first.
Any Autozone or O Reillys can load test it for you.
If you were closer you know I'd get you taken care of.
Give me a call if you need anything.
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