Chinese stator magneto flywheel for 50cc engines.  May also fit other engines.  Please use the measurements and pictures to match your part.

Flywheel description:

• Outside height of brass: 36mm (1.41 in)
• Overall OD including tab: 101.4mm (3.99 in)
• Overall OD not including tab: 99.8mm (3.93 in)
• ID of magnetic area: 80.8mm (3.18 in)
• OD of inside hole: 24.1mm (0.949 in)
• ID of inside hole: 15.3mm (0.60 in)
• Cutout flywheel key notch.
• (3) threaded bolt holes
• 40QMB  E40QMB  1E40QMB  1PE40QMB

• Known to fit 50cc 2-stroke 1PE40QMB or 90cc 2-stroke 1PE50QMF Minarelli based engine used by Adly, Aeon, Aprilia, Atala, Benelli, Beta, BKM, BSV, CPI, Dinli, Eton, Fly, Geely, Genuine, Italjet, Kasea, Keeway, Kreidler, KTM, Kymco, Linhai, Malaguti, MBK, Minarelli, Motron, MZ, PGO, Polaris, Strada, TNG, Vento, Xtrem and Yamaha.