Invest in re-keying the bike--it's well-worth it. I'd change the locks in the house,too. If you have an alarm, change the codes.

As SOON as you said "sugar in the tank" I thought "Wife or G/F".

We've had to fire a few of nannies over the years--I've re-keyed a lot of locks! There's re-key kits that are sold that use colored tumblers and provide enough tumblers to do 6 locks--and they give you new keys.

Next: Choose better G/Fs and dump ones inclined to do this--BEFORE it gets to that!:lol