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2002 Superhawk stalls out when driving high speeds for extended period??? Any Ideas??

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Old Apr 22, 2011 | 05:47 PM
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2002 Superhawk stalls out when driving high speeds for extended period??? Any Ideas??

Hi, I was driving my 2002 1000f superhawk down the highway and when I run it at 130mph or over for a few minutes it stalls out like it is not getting any fuel to the carbs. I took the tank off and checked the fuel lines and blew out the tank lines with air. Still have problem. The bike stalls and I half to choke it to restart it. I can then drive high speeds again for a while. Not sure what the problem is any ideas????
Old Apr 22, 2011 | 07:31 PM
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-Any aftermarket parts? (mufflers, jet kit, etc.)
-When was the last tuneup (plugs, carb balance, valve adjustment, air filter)
-How many miles are on the bike
-Do you weigh 300lbs?
Old Apr 22, 2011 | 07:35 PM
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I got a KN air filter and I am only 190lbs there is only 12000 miles on it. Have not adjusted valves and just put new irridium plugs in it last fall.
Old Apr 22, 2011 | 08:17 PM
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Petcock could be on it's way out. My bike died out at just freeway speeds a few times. A giant hole in the diaphragm turned out to be the culprit.
Old Apr 24, 2011 | 02:51 PM
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Ok thanks I will check it out.
Old Apr 24, 2011 | 03:09 PM
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How did you know this was the problem did it leak or anything or is it just one of the things you check???
Old Apr 24, 2011 | 03:19 PM
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Mainly from knowledge learned from here. But it was definitely a fuel starvation issue. So a malfunction in the automatic petcock made sense. From what I hear, I guess they usually leak out of the vent on the bottom. I don't recall mine doing that. Maybe it did though.

Also, search for PVLIR here on the forum. This could be another possible cause if you had the tank off shortly before the problem occurred.

Last edited by mboe794; Apr 24, 2011 at 03:22 PM.
Old Apr 24, 2011 | 04:20 PM
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You said that you cleared the fuel lines but did you check the tank vent line? if it blocked or pinched it could cause vacume in the tank starving the carbs at that rate of fuel burn.
Old Apr 24, 2011 | 06:33 PM
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petcock, pinched line or carb my need a good cleaning. Gunked up float valve may be sticking and not allowing bowls to "stay full".

Good luck
Old Apr 24, 2011 | 06:44 PM
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Originally Posted by mboe794
Petcock could be on it's way out. My bike died out at just freeway speeds a few times. A giant hole in the diaphragm turned out to be the culprit.
That's my vote.
Old Apr 26, 2011 | 05:50 PM
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Thanks for all your advice!!!!!
Old Jul 25, 2011 | 08:06 PM
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Thanks all was the petcock got a new petcock cover kit and bike works great!!!!!!!!
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