RE: Futaba 5101 servo
Hi PeteJoMan,
The gear set for the S5101 is the same as the one for the S9101, which is:
FUTM3405 FGS9101 SERVO GEAR SET S9101 retail price $5.99
I hope you find this information helpful. You can also reach our Futaba support technical team at 217-398-8970, or via fax at 217-398-7721.
Sincerely,
Krysta
Lead Futaba Customer Service and Programming Technician