Suzuki DL650 Service Manual page 227

FUEL SYSTEM AND THROTTLE BODY 5-17
Disconnect the throttle cables from their drum.
Dismount the throttle body assembly.
Be careful not to damage the throttle cable bracket
and fast idle lever when dismounting or remounting
the throttle body assembly.
*
After disconnecting the throttle cables, do not snap
the throttle valve from full open to full close. It may
cause damage to the throttle valve and throttle body.