Running issue 2010 F4 - MVAgusta.net
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post #1 of 13 (permalink) Old 03-04-2018, 05:47 PM Thread Starter
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Running issue 2010 F4

Hey All,
Bike ran fine last time I rode it (Last August). Started it a few weeks ago and seemed rough. Rode it and was rough and low on power below about 5K RPM, had usual "holy shit" power above. No service light on. Pulled plugs and all looked fine, replaced them. 7K miles on bike. Drained fuel tank and replaced filter. No change. I've noticed that when started cold, it runs well for less than a minute and then you can hear it change to rough and erratic.
I did a cylinder contribution test after it changed to rough running and all were firing. I misted the throttle body's with carb clean to check for lean, no change. No smoke or unusual smell from the exhaust and clean plugs makes running rich unlikely.
Only issue I've had with the bike was a leaking radiator on the left upper mount. Never overheated. I can't see where the leaking coolant could have gotten into anything electrical. Radiator has been repaired.
Service light is now lit after me buggering with it. I've checked with local bike shops and "back to dealer" is recommended. Dealer is 1.5 hours away.
Any ideas?? Thanks!

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post #2 of 13 (permalink) Old 03-04-2018, 06:24 PM
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If it was fine before you parked it, and now running poorly after sitting in storage with no other changes I would say dead gas related. What kind of gas was in it when you parked it? If it was E10 you may have partially restricted injectors from dry E10 fuel residue.

You put new plugs in after you drained the tank and put in fresh gas? If not, the crappy gas could have fouled your new plugs.

Try running some good fuel injector system cleaner. Put a heavy dose in the tank.

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post #3 of 13 (permalink) Old 03-04-2018, 06:39 PM Thread Starter
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Hi retired Ed!
Thanks. Changed gas when I replaced the fuel filter. This was after I replaced the plugs. Original plugs looked fine. If the injector / injectors were partially clogged, wouldn't a mist of carb clean give the engine something to burn and improve the idle momentarily? For the low cost of trying injector cleaner, I'll give it a try. I have a injector cleaning kit for cars and I think it has an adapter that will attach to the fuel rail.

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post #4 of 13 (permalink) Old 03-05-2018, 08:53 AM
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Hi Gary...interesting issue. Check all of your electrical grounds. There are several. Make certain they are clean and tight. Also check your starting solenoid for cleanliness and good continuity of connection.

The things you have already done should have eliminated most of the culprits. There has been a recent rash of coil failures reported....

Which dealer would you be going to if you went to one?

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post #5 of 13 (permalink) Old 03-05-2018, 08:39 PM Thread Starter
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Thanks Chuck. I guess Gold Coast in Long Island.
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post #6 of 13 (permalink) Old 03-06-2018, 09:24 PM
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Similar issues on same model here. Although I did not went to any troubleshooting and just rode the bike as is (itís not so bad and it does looks better now after a 500km ride), I will follow up closely.

Please report what your findings and solutions are.

By the way, fuel here has an average of 30% of etanol.


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post #7 of 13 (permalink) Old 04-15-2018, 01:07 PM Thread Starter
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[QUOTE=allanl;2446978]Similar issues on same model here. Although I did not went to any troubleshooting and just rode the bike as is (itís not so bad and it does looks better now after a 500km ride), I will follow up closely.

Please report what your findings and solutions are.

By the way, fuel here has an average of 30% of etanol.


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Flushed injectors yesterday. Good as new!!!

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post #8 of 13 (permalink) Old 04-15-2018, 01:59 PM
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Great to know.

Did you used a cleaning solution mixed with fuel or disassembled and flushed on the conventional process?

Mine is sometimes better sometimes worse, but still did nothing about it


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post #9 of 13 (permalink) Old 04-15-2018, 04:23 PM
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One of the reasons I always run non ethanol fuel when possible.
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post #10 of 13 (permalink) Old 04-15-2018, 05:45 PM
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I can only find Ethanol fuel at gas stations but can get my hands on non ethanol racing fuel. So you always run non ethanol racing fuel even on the street?? I am asking cuz my recently purchased my10 f4 has an expanded/swollen fuel tank right near the fuel pump which is making it leak all the gas. IN the process of replacing the tank which is again plastic. I don’t want the new tank to end up like the old one. So wanna know what I can do to prevent this
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