F4 1000S 2004 - Serious electrical problem - MVAgusta.net
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post #1 of 31 (permalink) Old 03-16-2014, 01:33 PM Thread Starter
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F4 1000S 2004 - Serious electrical problem

Hi!

So I have this, possibly, serious electrical issue.

Last summer I drove on a trip from Sweden to Denmark. And when i Denmark we encountered a heavy rainfall, I mean really heavy.

At a red light my engine stalled, it just died. Then when i tried to start it the starter just made a buzzing noise, like if your battery is low. Also the oil light and some other light was on all the time - even when the ignition was off.

I ran with the bike in gear/clutch and release the clutch to start and it worked. The engine stalled a couple of times more and every time I had to run with the bike to get it started. I managed to drive all 400 km back to Sweden, the engine was running good all the time and the electronics worked except for sometimes the RPM gauge flickered and the needle jumped froim and to zero all the time.

I changed the battery, cause I figured it could be a broken cell or something - but the bike didn't start with the new battery - same thing - the starter just buzzed and the oil light and some other light was on (like 50% of the light it usually emits) no matter if the engine was turned on or off. The bike also drains the battery really quickly when it is plugged in.

PLEASE help me with suggestions, where to start looking for a fault, i'm guessing it has something to do with the rainfall. Shortage somewhere? Starter? Alternator? I have no idea (but i'm used to working with bike so I will try to fix it myself)

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post #2 of 31 (permalink) Old 03-16-2014, 01:46 PM
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Start with Donsy's website listed at the bottom of his signature in any thread in which he has posted (It is also in a thread that is pinned to the top of the maintenance threads).
On his website, he has all of the manuals for each bike for your electronic download.

Follow the troubleshooting guide for a bike not starting.

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post #3 of 31 (permalink) Old 03-16-2014, 02:54 PM Thread Starter
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Quote:
Originally Posted by silentservice703 View Post
Start with Donsy's website listed at the bottom of his signature in any thread in which he has posted (It is also in a thread that is pinned to the top of the maintenance threads).
On his website, he has all of the manuals for each bike for your electronic download.

Follow the troubleshooting guide for a bike not starting.
Thanks for your answer.

I've looked through that section of the manual but it's to generic, since my problems really don't apply to any of the topics there..

But i think I will start iwth removing the fairings, wash the bike with plenty of detergent and water, then I will part every conenction I can find and use deoxidizer in them.

But it must be a shortage of some sort is what I'm thinking, since some lights are on even if I switch the ignition off?
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post #4 of 31 (permalink) Old 03-16-2014, 04:50 PM
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Do you have a multimeter?

Sounds to me like you have a poor connection somewhere on one of the high current leads?

Measure the voltage across the battery while you are trying to start to see if the actual battery voltage is the problem. I would think not.

Check the connections on the other ends of the 2 battery leads?

Measure the voltage on the starter while cranking?
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post #5 of 31 (permalink) Old 03-16-2014, 05:02 PM
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I can send you a starter solenoid to try. You can test your starter easily with a multi meter
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post #6 of 31 (permalink) Old 03-16-2014, 05:13 PM
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Check and clean all the earth points on the bike also.


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post #7 of 31 (permalink) Old 03-17-2014, 01:20 AM Thread Starter
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Quote:
Originally Posted by gotojoe View Post
I can send you a starter solenoid to try. You can test your starter easily with a multi meter
Joe

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Thanks for all the answer, I love this forum..

Joe: That would be awesome! Although I decided to wait just a little until i strip the MV, I'm currently working on a Yamaha R1 racebike and it's shattered all over my garage, so i'll put that togeteher first so I don't mix up the parts I'll PM you later on, I'm still hoping for a easy fix though, like corroded power cable or something..
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post #8 of 31 (permalink) Old 03-17-2014, 01:50 AM
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Wink

Svensson;
it has nothing to do with your charging system/battery....
it got you the 400kms back to Sweden

the trouble shooting guide in the manual is where to start

short across the solenoid terminals....if it turns over..

its probably the hand switch gear, more than likely the right side


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post #9 of 31 (permalink) Old 03-17-2014, 03:58 AM Thread Starter
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Quote:
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Svensson;
it has nothing to do with your charging system/battery....
it got you the 400kms back to Sweden

the trouble shooting guide in the manual is where to start

short across the solenoid terminals....if it turns over..

its probably the hand switch gear, more than likely the right side

Ok i'll start with that, seems like a good idea.

What puzzles me though is the fact that the rest of the electronics are wierd as well when I turn the ignition on, the fuel-pump doesn't start like it usually does when i turn the ignition on, the headlight doesn't light up (only very very dim). Can it be a malfunctioning ignition perhaps? This is with a new, charged, battery.. so the battery is not the problem..

When you say hand switch gear, you mean the actual starter button?
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post #10 of 31 (permalink) Old 03-17-2014, 04:12 AM
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Ok, here goes, the traditional question after a battery change-out: Are you positively certain that you did not reverse pole the electrical system by intalling the battery backwards?

Your Yuasa replacement battery should have been installed on its side with the negative terminal toward the front of the bike.

Start there.

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