Polini 21mm carburettor kit for Piaggio/ Gilera 2-stroke scooters.

Complete carburettor intake system developed by Polini Motori for Piaggio-based 50cc 2-stroke engines. Designed to optimise airflow and mixture atomisation for improved throttle response, reliability, and performance on tuned or stock setups.

At the heart of each system is the innovative Polini CP 21mm carburettor, featuring a 360° rubber manifold, upgraded air filter, air starter control, throttle cable, and adjustment screw. The carburettor’s compact intake union and exclusive concentric design optimise airflow, improving gas passage efficiency and simplifying tuning.

High-quality Italian production. Ideal for riders seeking smoother fueling and better low-to-mid range response on sport or mid-race engines using a 21mm carburettor.

Factory calibration:
Main jet: 100
Pilot jet: 40
Needle: 14/22
Slide: 24x30
Atomiser bush: Ø2.7

Polini 177.0091