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The timing is factory adjusted for the life of the motor>-----Normally no need to adjust it.-----What is your motor doing / not doing ?
What are the actual compression numbers ?------Have you replaced water pump impeller ?----Checked reed valves ?
Yes and cleaned with ultrasonic machine and simple green hd.As long as the orange & blue wire are connected to the top coil , the power pack controls the timing and you never have to adjust it. Ever . your rebuilt the carb, did you use an OEM kit and replace EVERYTHING.