The voltage regulator operates as it should.

O.E.M Part Number 3TJ-81960-02-00

Make	Model	Year	Submodel
Yamaha	TTR225	1999-2004	All
Yamaha	XT225	1996-2000	All
Yamaha	SecaII600	1992-96	All
Yamaha	TDM850	1992	All
Yamaha	XT250	2008-12	All
Yamaha	TTR250	1999-2006	All
Yamaha	TW200	2001-22	All