Description CNC Aluminium Upgrade Oil Drain Plug for Aprilia / Piaggio 125-500cc. The CNC’d aluminium is significantly less prone to stripping, however the really clever upgrade is a powerful magnet which is held into the inside of the plug by a circlip. The idea of this magnet is to pick up and retain any metal fragments which may come loose inside the engine during running. Engine internals wear over time, and small particles of metal can often been seen inside the oil between services (particularly on new bikes which are inside their run-in period). In rare cases, failure of engine internals can also lead to metallic items being loose inside the engine. This magnet can be removed and cleaned at the service, keeping metallic fragments out of the internal working parts of your engine
