Piaggio SI – LED Headlight Reflector Replacement

This project replaces the original headlight reflector of the Piaggio SI with a 3D-printed cover designed to hold a standard LED spotlight. It allows you to upgrade the original lighting system while keeping the classic look of the bike.

The part fits inside the original headlight housing and acts as a mounting base for a round LED light (focal/spot type). It is optimized to be printed without supports.

Features

Replaces the original Piaggio SI reflector

Designed for installing a round LED spotlight

Keeps the original external appearance

No support structures required

Easy installation using the original mounting points (or basic screws)

Recommended Print Settings

Layer height: 0.2 mm

Infill: 20–30%

Perimeters: 3

Material: PLA, ABS or PETG

No supports needed

Optional: Brim/Skirt for better adhesion

Assembly Instructions

Remove the original headlight lens from the Piaggio SI.

Take out the original reflector.

Insert the 3D printed cover into the headlight housing.

Inst