PIAGGIO MSS FLY 50 4T WORKSHOP MANUAL Pdf Download. Page 3 MSS Fly 50 4T This workshop manual has been drawn up by Piaggio & C. Spa to be used by the workshops of Piaggio- Gilera dealers. This manual is addressed to Piaggio service mechanics who are supposed to have a basic knowledge of mechanics principles PIAGGIO FLY 50 4T 4V MANUAL Pdf Download. - manualslib Fly 50 4t 4v Chap. 03 Maintenance.. Page 30: Engine Oil Level Engine oil level (03_01) In 4T engines, the engine oil is used to lubricate the distribution elements, the bench bearings and the thermal group.