It depends on whether it is a WX7 upright, a C3/C5 or a C7. The WX7 usually takes about three hours. The C3 or C5 usually take about 6 hours. The C7 maybe about an hour longer than the C3/C5. These times are based on technicians that have done the job several times. Give Greg Frank a call at Yamaha (800) 854-1569 for specific details. Good Luck!
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