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ECM (computer) must be re-initialized if the ecm or throttle position sensor are replaced.
procedure for calibration of 650 as follows
stop running vehicle and shift to neutral (N on dash)
stop engine
turn ign switch on while holding up and down buttons down at the same time. N on dash should blink
within 5 seconds, push shift buttons up,down,up. Dash should read ---
within 5 seconds,move throttle from full closed to full wide open and back
Dash should read N when completed
procedure for calibration of 650 as follows
stop running vehicle and shift to neutral (N on dash)
stop engine
turn ign switch on while holding up and down buttons down at the same time. N on dash should blink
within 5 seconds, push shift buttons up,down,up. Dash should read ---
within 5 seconds,move throttle from full closed to full wide open and back
Dash should read N when completed