Battery condition is extremely important. No voltage regulator can work correctly with a bad or weak battery. Always fully charge your battery before performing any charging system tests or replacing parts. If there is any doubt, have the battery load tested or replaced.
Virago 1100 -- 1986-1999
Virago 535 -- 1987-1996
Virago Special 535 -- 1994-1996
Virago XV 700 -- 1984-1987
Virago XV 750 -- 1988-1997
V-Max 1200 -- 1985-1995
XV 1000 -- 1984-1985