LOSI Promoto-MX Motorcycle Aluminum Rear Caliper (Purple) by JAZRIDER JR-LMX06-PU  [JR-LMX06-PU]

Aluminum rear caliper for Promoto-MX

This aluminum rear caliper is supplied as an RC-scale replacement part for the Promoto-MX motorcycle line. The purple anodized finish identifies the component visually while the aluminum construction is intended to offer a stable mounting point for the brake assembly on model dirt bikes.

Intended role: use this caliper when replacing a worn or damaged rear brake unit or when testing minor brake setup changes. It supports straightforward mechanical tuning such as pad alignment and lever travel adjustments without altering chassis geometry.

Installation notes: the part is designed for direct fitment to Promoto-MX rear brake mounts as indicated by the product name. Use the original mounting hardware where possible and check thread engagement and torque on all fasteners after the first run. Perform brake bedding and function tests at low speed on a safe surface before full use.

Compatibility and caution: this article describes an RC-scale accessory for Promoto-MX motorcycle models only, confirm fitment against your model before installation, and do not use this part on full-size vehicles.