Medius X26 Tensioner Shaft Replacement 402201 for Serpent  [SER402201]

Function and fit of the X26 shaft

The Serpent 402201 belt tensioner shaft serves as a steel replacement designed for belt-driven Serpent Medius X26 kits. It is used to set and maintain belt tension within the tensioner assembly, helping the belt run true and limiting slack-induced drivetrain losses in electric on-road models.

Intended for model builders and repair technicians, the shaft occupies the tensioner pivot location in the chassis and interfaces with the pulley and mount to keep alignment under load. This aftermarket part is about durability and correct mechanical fit rather than appearance.

Fitment notes: insert the shaft into the tensioner bracket and pulley stack following the kit's assembly order, verify smooth pulley rotation and accurate belt tracking, then check tension across the full travel range. Refer to your kit manual or vendor for recommended torque values and details on any included small parts.

This steel shaft is a direct, no-frills replacement for the Medius X26 tensioner sub-assembly, ideal for racers and hobbyists seeking dependable belt tension and drivetrain stability.