Parked in Garage for 2 months

hi guys

I really love my classic but I love more my health... I have a problem in my back which means no mountain bike and no motorcycle for 2 months.

I would like to know what should I do to avoid any problem in my bike having it two months just doing nothing

my first bike (novice) so should I least power the engine on every 2 weeks or something like that?

thanks