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Hyosung running rich

I am running rich and the FI light is on? What should I do to troubleshoot what to fix?

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2012 Hyosung GT250 EFI lurches when going off throttle and then back on throttle. How to eliminate problem?


Hi, David my gut tells me it's a sensor issue (TPS or MAP) for this situation I would call my local dealer or reputable shop's service/parts department and inquire about any possible quick fix, answers, or parts inquiry. For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
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Hi, Pranesh for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Hyosung, despair not, for a mere $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
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I have a 2010 hyosung GV650 Aquila, battery wont hold charge, FI light comes on and bike stalls.


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get it serviced. no country stated, btw,

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Hi, Kingsley for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere zero $0 you can download another one.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
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I have a hyosung 2008 gt 250 r fi model. when i start the engine,idle jumps to 5000-6000 rpm . i checked the isc selenoid and while the ignition switch off the selenoid long,while ignition switch on the...


This doesn't sound like an electrical problem. It sounds more like an air leak between the carburetor and the cylinder. Air that has not gone through the carburetor makes the fuel/air mixture lean. This causes the engine to run super fast and hotter as well. Check all rubber fittings and seals between the carb and the cylinder. Be sure the clamps are tight and all mounting bolts are tight.

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1 Answer

PGM-FI light came on- on dash and the car is running realy rough could you tell me what this is and if it is costly to fix?


get 02 sensors tested-they monitor rich n lean conditions--chec for any vacuum leaks-they dont show up on computors

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