O.S. Engine OS44981200 Carburettor Rotor - 60Y FSa-110  [OS44981200]

Rotor role, fitment and tuning impact

The O.S. Engine OS44981200 rotor is supplied as a single replacement component intended to sit within the carburettor assembly and control airflow via its rotation. It is intended for repair and tuning use rather than as a full carburettor unit.

Prior to installation, ensure the rotor shape and shaft interface correspond with your carburettor's internal dimensions. Replacement will require partial disassembly of the carburettor; use appropriate small precision tools and keep any shims or retaining hardware accounted for during the process.

For tuners the rotor can influence the airflow profile and therefore idle, low and mid throttle behaviour. Seating and orientation during reassembly can change mixture characteristics, so conduct a controlled test run after fitting and adjust both high and low needle settings to match engine response and ambient conditions.

Designed for hobbyists and mechanics who perform carburettor servicing or tuning, this rotor offers a component level replacement to assist repair and setup tasks.