Yes , it is possible to have the dip stick unscrew from the dip stick cap . You have found the cap with no dipstick installed right ? Both of my dip sticks could unscrew with little effort. I have found that the stick needs to be secured with locking agent into the cap . If the stick is in the oil tank , it should pose no harm in my estimation . If you completely drain the tank and put the bike on a steep downward incline , you may be able to see it through the fill hole and recover with magnet or mechanical fingers ? A warning to others that have not checked , Loctite the stick into the cap (I used red )! A suitable 5mm bolt can be used until you can get a replacement.