F4 sounds like twin and power loss - MVAgusta.net
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post #1 of 17 (permalink) Old 09-07-2017, 07:08 AM Thread Starter
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F4 sounds like twin and power loss

Looking for some help. 2005 F4 1000 full ti and eprom. Bike had sat for 1.5 years and recently transported to another country. Fired it up went for a ride and 20-30 minutes after riding the engine started to sound like a twin and the power was just not there. Let it sit for 15 minutes after seeing nothing on inspection. Fired it back up and it sounded/acted normal. Another 15 minutes down the road the power loss and sound returned.

Had a local mechanic (non-MV) change plugs, oil, fuel, filter. Took it out and again after warming up the twin sound and power loss return. There is the potential that the mechanic may be dodgy. However the bike is acting the same as it did before he touched it. He may have not done much to as what he charged for it as I am a foreigner in a foreign land.

So anyone here of 4 cyl sounding like a twin and power loss and occurs after the bike is warmed up and running ??????

Thanks for thoughts/suggestions
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post #2 of 17 (permalink) Old 09-07-2017, 07:11 AM Thread Starter
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I searched the forum to see if this had been addressed and my issue does seem to be different than others..
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post #3 of 17 (permalink) Old 09-07-2017, 07:18 AM
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It sounds like the EBS relay...It is known to get hot, malfunction, and reduce power. Do a search on EPS relays.

That would be my first guess.

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post #4 of 17 (permalink) Old 09-07-2017, 04:21 PM
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Quote:
Bike had sat for 1.5 years
Fuel degradation ?
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post #5 of 17 (permalink) Old 09-07-2017, 04:46 PM
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You need to start diagnosing.When it is misfiring is it just one cylinder down? Because you could have 1 coil breaking down.
When the mechanic changed the fuel filter did he replace the internal hoses also?
All common issues.


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post #6 of 17 (permalink) Old 09-10-2017, 07:25 PM
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No, Mitch, '05 batch firing coils.... Ed's favorite

Halo do you have an inductive pickup timing light? When it's misbehaving
Lift the tank, start the bike and clamp on plug wires 1 or 2, or 3 or 4
You will find the failing coil


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post #7 of 17 (permalink) Old 09-11-2017, 01:35 AM
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post #8 of 17 (permalink) Old 09-11-2017, 04:03 AM
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Quote:
Originally Posted by theknurl View Post
No, Mitch, '05 batch firing coils.... Ed's favorite

Halo do you have an inductive pickup timing light? When it's misbehaving
Lift the tank, start the bike and clamp on plug wires 1 or 2, or 3 or 4
You will find the failing coil

Noel, that is what a clamp-on ammeter can do for you, too. (Just sayin')

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post #9 of 17 (permalink) Old 09-11-2017, 05:02 AM
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Chuck you might want to think how many amps you'll be seeing at 40,000 volts......



There is a point where accuracy of clamp on amp guage makes it irrelevant ......

Use a timing light.

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post #10 of 17 (permalink) Old 09-11-2017, 10:21 AM
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Accuracy isn't the issue....detection is....just like a timing light. (I've got one of those, too.)

If you have one or the other, you can achieve the same end.

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