This is why you use a magnetic oil drain bolt. : r/xsr900

M14 Magnetic Oil Drain Plug Bolt for Yamaha FZ1 FZ6/R FZ-07 FZ-09 FJ-09 MT-09 YZF-R1 XJ6F/S XJR1200 FJR1300 XJR1300 V-MAX XSR900

This is why you use a magnetic oil drain bolt. : r/xsr900

Zeta Magnetic Oil Drain Plug Bolt - Parts Giant

CNC Magnetic Oil Drain Plug Bolt for Yamaha YZF R1 98-14 R6 99-18 XSR900 2016-18

SP TAKEGAWA : Drain Bolt with Magnet [02-09-0022]

JMP Bolt magnetic oil drain plug M14x1.50mm 12mm titanium black for Yamaha XV Virago FZS Fazer/ S 50/70/80/125/250/300/350/360/400

by CarpiMoto Oil Drain Plug TOM14150

ZETA : Magnetic Drain Bolt [ZE58-1522]

Motorcycle Magnetic Oil Drain Plug for Yamaha R1 R6 FZ1 FZ6 FZ8 MT07 MT09 FZ07 FZ09 XSR900 TDM850 XJR1200 1300 V-MAX FZR250 400