Yokomo FA-19021ST FANTOM HELIX RS SPEC 21.5T Tunable Race Motor with Titanium Shaft  [FA-19021ST]

Yokomo FANTOM HELIX RS Spec: Balanced Power for Consistent Laps

The Yokomo FANTOM HELIX RS Spec Motor targets racers seeking even, controllable power and refined engineering. Constructed to comply with ROAR regulations, the motor benefits from improved rotor balancing, a purposeful case layout, and a stator design tuned for efficient output. It is built with setup flexibility in mind so you can dial in performance for different circuits.

Rotor Balance and Stator Performance

Featuring a dual balance rotor arrangement, the HELIX RS Spec reduces unwanted vibration and delivers steadier throttle feel. The stator geometry contributes to measurable torque and RPM characteristics while keeping efficiency in check. The Japan-only titanium shaft option helps mitigate stalling when navigating tight technical corners.

Setup Options and Robust Connections

Three rotor lengths are available RSR 24mm, RS 25mm (standard), and RST 26mm to let you tune response and top speed. The collector ring redesign and silver-plated solder tabs are intended to maintain high performance under race loads.

If you want a motor that trades raw top speed for controllable, repeatable performance, the Yokomo FANTOM HELIX RS Spec is a practical choice for race setups that need fine tuning.