Question about 2007 Suzuki GSF 1250 Bandit

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Will not go above 4500 revs power loss, overheating.

Engine dies at about 4500 revs 90 mph ish, overheats. low revs seems ok. new fuel filter, clean tank. starts ok when cold runs ok.

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It sounds as if the engine is running very lean, this can be caused by several things. Firstly the fuel filter you have installed, is it pointing in the correct direction (Fuel in and Fuel out), also is it a high pressure filter? If not remove it. Another thing that causes problems is the fuel pump could have a problem, it is also possible the gauze filter on it is clogged. Next check the fuel you have and make sure it has no water in it, to clear small amounts of water you can get a tank of ethanol, this will mix water and burn it off as you ride (Don't us a big mix E10 should be sufficient) if you don't like the ethanol, empty the tank of ethanol and refill with regular fuel.

Posted on Jul 18, 2010

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Had a simular problem last month. This is how I fixed it: Removed tank, removed fuel pump assembly, removed an cleaned the white plastic fuel filter (doesn't stop fine **** from going into the pump). Removed acual pump from the housing and blew air through every thing (pay close attention to the metal gause filter. Wired pump upto 12 volt battery and flushed through about a litre of fuel. Blew more aire through all parts and repeated pumping another litre of clean fuel thrugh the pump. Made sure there was no more fine **** an all the parts. Reassembled pump. Cleaned out fuel tank (just swilled it with clean fuel). Put pump back into the tank and filled tank with clean fuel. Has been running like new since then. Hope this helps.

Posted on Jul 31, 2010

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Posted on Jan 02, 2017

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