The Yokomo FA-19221S is a 21.5T stock-class motor intended for RC touring events that follow R.O.A.R. stock motor regulations. It utilises Yokomo’s FANTOM stator arrangement, which holds an American patent, and the motor is referenced in recent Japanese touring car rules related to the same stock class.
Practical testing from team drivers highlights a tendency toward increased low-speed torque within the 21.5T constraints, making the motor suitable for circuits that reward controlled acceleration and precise throttle modulation.
Fitting the motor is consistent with other 1/10 touring brushless installations and matches typical motor mounts and pinion/spur arrangements of modern touring chassis. Maintain proper clearance and direct cooling airflow to prevent overheating and ensure repeatable lap times.
As a regulation-aware 21.5T option, the FA-19221S aims at drivers wanting a torque-emphasised stock motor that aligns with R.O.A.R. and current Japanese touring specifications, and it integrates with standard 1/10 touring drivetrains when installed with normal clearance and cooling attention.
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