Yokomo FA-18613ST Titanium-shaft rotor for FANTOM HELIX RS SPEC EDITION motor  [FA-18613ST]

FANTOM HELIX RS competition rotor

This FA-18613ST unit is the titanium-shaft rotor variant designed for the FANTOM HELIX RS SPEC EDITION motor family, carrying JMRCA certification as noted in the original release. It is specified as a direct component for that motor platform and intended for RC-scale on-road competition use under regulated output limits.

Technically the part replaces the rotor assembly shaft with a titanium shaft offering higher surface hardness and corrosion resistance compared with standard steel shafts, which can help maintain concentricity and reduce wear in race conditions. The component is presented as a motor-level upgrade that focuses on durability and consistent mechanical timing rather than altering electrical or power characteristics.

Installation notes: check rotor endplay and bearing fit during assembly, observe correct rotor orientation for the HELIX RS SPEC EDITION motor, and verify motor pinion clearance with the spur gear after reassembly. Use appropriate tools and avoid forcing the shaft to prevent damage to the motor housing or bearings.

Tuning and service guidance: this rotor is intended to preserve factory motor timing and meet class regulations, so tuning should center on drivetrain alignment, gearing, and electronic setup with your existing ESC and motor settings. Inspect the shaft for wear before each race meeting and replace if any scoring or deformation appears.

For teams and drivers running the FANTOM HELIX RS SPEC EDITION motor in regulated classes, the FA-18613ST titanium-shaft rotor is a durable replacement option that focuses on mechanical reliability; fit and check clearances as part of your routine race maintenance.