Tenant wants to store his motorcycle in my shed

[Jenna W.]

Hello

Today, my tenant purchased a motorcycle. He went into my shed, then asked me, since it was not full, if he could store his bike in there for the winter. I said no. My wheelbarrel and lawn mower are out of the shed at the moment, and once they are in there, the bike will not fit. 

I could move my snowblower into my basement and out of the shed for the winter and the bike might barely fit. 

If I allowed this, I would charge him a nominal fee in the winter, to cover storage and insurance if I have to add any, I just don't know if

1.) I have an exposure here I can't think of off the top of my head, or off of google, I couldn't find anything.

2.) can I be specfic that I will not, nor will I allow him to modify the shed in anyway, and he signs off releasing me from any damage caused while in storage ?

I don't love that he didn't ask me before buying, and I don't love that he went into my shed without asking me, so, but I want to make the right decision not the irritated decision.

I own a 2 family and he lives upstairs and I live downstairs. I gave him basement access for a small storage room at no cost when he moved in. He has maintained that okay, having to clean it out once at my direction. he has been here a year, and we have always had an tenant at will agreement, do I add an addendum I have him sign for the storage space for 6 months of the year, or does that constitute a term, which I am trying to stay away from?

Thanks,

Jenna