Technical help – GT250R /2009

[Hakan]

Hello everyone, we’re having a problem with our 2009 GT250R that we can’t figure out. The engine doesn’t respond to the throttle until it reaches high RPMs, and sometimes it stalls. I have to keep revving the engine at high RPMs.

[Hakan]

[♠️ M77]

Low compression in one cylinder ?   or electric issues from Injectors or the fuel pump itself  (maybe the fuel pump is clogged on its strainer?)

have you looked at those ?  If in doubt , replace the fuel strainer  or the whole pump assembly, then get injectors cleaned  ,  after this, replace the spark plugs again using NGK CR8E

Report back to see if that helped ? Don’t forget to clean all the contacts of the wiring harness, so the ECU gets a clean signal for all sensors attached to the bike,  the Sentec & Daewoo ECU’s don’t respond very well to electric faults , so make sure the harness is good too!

[Author]

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[Hakan]

Hello everyone, we’re having a problem with our 2009 GT250R that we can’t figure out. The engine doesn’t respond to the throttle until it reaches high RPMs, and sometimes it stalls. I have to keep revving the engine at high RPMs.

[Hakan]

[♠️ M77]

Low compression in one cylinder ?   or electric issues from Injectors or the fuel pump itself  (maybe the fuel pump is clogged on its strainer?)

have you looked at those ?  If in doubt , replace the fuel strainer  or the whole pump assembly, then get injectors cleaned  ,  after this, replace the spark plugs again using NGK CR8E

Report back to see if that helped ? Don’t forget to clean all the contacts of the wiring harness, so the ECU gets a clean signal for all sensors attached to the bike,  the Sentec & Daewoo ECU’s don’t respond very well to electric faults , so make sure the harness is good too!

[Author]

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