Yokomo FA-18613ST Rotor Assembly, Titanium Shaft for FANTOM HELIX RS SPEC EDITION  [FA-18613ST]

Overview of the FA-18613ST titanium rotor

The FA-18613ST is Yokomo's titanium-shaft rotor option tailored to the FANTOM HELIX RS SPEC EDITION motor line and referenced with JMRCA certification in the release notes. It is intended to replace the standard rotor assembly on that motor platform for competition-oriented setups.

Mechanically, the titanium shaft offers improved hardness and corrosion resistance compared with regular steel, helping sustain rotor concentricity and reducing wear over time under race stress. This component is aimed at enhancing mechanical stability rather than altering electrical output.

When fitting the rotor, confirm bearing seating and rotor axial play, follow the motor's original orientation, and check pinion engagement with the spur gear after installation. Use correct sized tools and avoid excess force to protect the bearings and housing.

Setup advice: because the rotor is designed to retain stock motor timing, concentrate tuning efforts on gearing, drivetrain alignment, and ESC configuration. Inspect the shaft regularly for scoring and replace at the first sign of deformation.

For competitors using the FANTOM HELIX RS SPEC EDITION motor, the Yokomo FA-18613ST provides a durable rotor option focused on long-term mechanical consistency; always confirm fit and clearances during routine checks.