Honda NSS250S Manual page 258

FUEL SYSTEM (PGM-FI)
INSTALLATION
Turn the slide valve clockwise until lightly seated on
valve body.
Install the IACV into the throttle body while aligning
the valve slit with the guide pin in the throttle body.
Install the IACV retainer while aligning its groove
with the tab of the IACV.
Install and tighten the torx screws to the specified
torque.
TORQUE: 2.1 N·m (0.2 kgf·m, 1.5 lbf·ft)
Connect the IACV 4P (Black) connector.
Install the luggage lower box (page 3-16).
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SLIT
Align
IACV
SET PLATE
LUG
IACV TORX SCREWS
4P (Black) CONNECTOR
GUIDE PIN