Reply To: Technical help – GT250R /2009
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!