2008 F4 312 - MVAgusta.net
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post #1 of 13 (permalink) Old 12-24-2013, 03:23 PM Thread Starter
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2008 F4 312

Atfer a good run of maybe 40 miles, if I stop for gas, the bike is hard to keep running, it start and stops, quite a few times; the temperature is no more than 212-220 or so. Some times I need to wait like half hour or so before it runs steady. Any advise is appreciated. My bike with only 2532 miles.
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post #2 of 13 (permalink) Old 12-24-2013, 07:10 PM
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I had the same problem with my 09 312 and my 06 1000
I did the impeller water pump upgrade and it seemed to work.

Leo and andres at unique superbikes in Miami usually have it in stock

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post #3 of 13 (permalink) Old 12-25-2013, 01:38 PM Thread Starter
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Thanks Gary, will give these guys a call after New Years and make an appoinment. Happy New Year.
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post #4 of 13 (permalink) Old 12-25-2013, 03:26 PM
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If have not done so already get the Muzzy fans as well as the upgraded water pump impeller and outer case. Have them replace the seals in there while they are at it. My 2008 started puking coolant out of the bleed hole from a leaking seal on the coolant side. Easy and cheap insurance.

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post #5 of 13 (permalink) Old 12-28-2013, 05:38 AM
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This is a stalling problem isn't it,not overheating.Sometimes Iridium spark plugs can solve this problem and a check on the TPS setting.


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post #6 of 13 (permalink) Old 01-10-2014, 04:55 PM Thread Starter
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Hi! Gary, I contacted Leo, he is going to replace the impeller and fan in a couple of weeks, never dealt with them brefore, any opinion on their shop? Thanks. Hugo
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post #7 of 13 (permalink) Old 01-11-2014, 08:41 AM
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They are good guys. And Manuel the mechanic is excellent.
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post #8 of 13 (permalink) Old 01-11-2014, 08:57 AM
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Can it also be caused by fuel vapors locked inside the fuel tank..say a faulty gas cap?
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post #9 of 13 (permalink) Old 01-11-2014, 09:23 AM
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Yes, and it can be caused by fuel line problems and/or a clogged vapor cannister.

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post #10 of 13 (permalink) Old 01-12-2014, 04:48 PM Thread Starter
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Thanks for all your good advise, I'll be taking the bike to SBK in Miami this coming month of Feb, for a new impeller, and a new valve gasget, and an oil change. Thank you all.
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