Kyosho KS-104

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*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-07-28

Identity
Brand
Product Number	82120
Category	Hobby
Discontinued	Yes
Performance
Torque	6.0V 56.95 oz-in 4.8V 44.45 oz-in Bottom 10%
Speed	6.0V 0.20 sec/60° 4.8V 0.25 sec/60° Bottom 10%
Physical
Weight	1.20 ozTop 10%
Dimensions	L 1.594 in W 0.791 in H 1.441 in
Drivetrain
Gear Spline/Teeth	25 T estimate
Electrical & Environment
Operating Voltage	4.8–6 V
Connectivity
Connector	JR (Universal) estimate
Origin
Country of Origin	Japan

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Disclaimer: Most data is sourced from the manufacturer. Some data is sourced from our loyal community and with the help of AI. We aim for accuracy but are not responsible for inaccurate information.

Compatible Hardware

Amazon eBay

*Spec is estimated from brand data.

Class Comparison

Torque	Bottom 10% Stronger than 5% of 1294 Standard servos at 4.8V
Speed	Bottom 10% Faster than 2% of 1290 Standard servos at 4.8V
Weight	Top 10% Lighter than 97% of 2538 Standard servos

Performance Analysis

Shaft Power	0.33–0.53 W
Power Density	0.290 W/in³ More power-dense than 4% of 2381 Standard servos
Torque Density	1.3074 oz-in/g Stronger than 12% of 1286 Standard servos
Torque-to-Volume Ratio	24.46 oz-in/in³ Denser torque than 5% of 1291 Standard servos
Speed-to-Weight	0.11765 (1/sec·g) Faster than 52% of 1281 Standard servos
Speed-Torque Trade-off	11.11 Better balanced than 20% of 1280 Standard servos
Torque Gain per Volt	23.43%/V More voltage-responsive (torque) than 90% of 1037 Standard servos
Speed Gain per Volt	20.83%/V More voltage-responsive (speed) than 80% of 1060 Standard servos
Voltage Range Width	1.2 V Wider voltage range than 12% of 1849 Standard servos