Quality Japanese Made Air Cut Off Valve 
88-H009

KACV-023K

Replacement for OEM: 16048-MR1-004 / 305

16048-MS9-000

Honda:

PC800 Pacific Coast 1989-1990, 1994-1997
NT650 HAWK GT 1988-1990

NTM650 Revere RC38

VT600C SHADOW PC21 / SHADOW DELUXE 1988-1998
XRV650 Africa Twin RD03

Please crosscheck your parts manual to make sure these are the valves you are looking for