Suzuki SY413 Service Manual page 2581

D Any time the air cleaner, air intake case, throttle body or intake
manifold is removed, the intake opening should be covered. This
will protect against accidental entrance of foreign material which
could follow intake passage into cylinder and cause extensive
damage when engine is started.
D When disconnecting couplers, don't pull wire harness but make
sure to hold coupler itself. With lock type coupler, be sure to un-
lock before disconnection. Attempt to disconnect coupler with-
out unlocking may result in damage to coupler. When
connecting lock type coupler, insert it till clicking sound is heard
and connect it securely.
ENGINE (ENGINE WITHOUT WU TWC) 6-5