Couple of ideas
Bicycle: a crate that you can tie to the handle bars for extra storage (old school) or one those spring thingies on the back
Moto: saddle bags, storage (could make them out of leather/sewing kits)
Car: drop tank for extra fuel storage
and a gasifier( I think they call them), dooms day prepper on youtube made one, some big contraption that went on the back of the car that you chucked wood in to burn and used that as an alternative fuel source, like doc's DeLorean garbage thingy in back to the future
had a few more forgot to write them down, will hit yous up if I remember or think of more
Bicycle: a crate that you can tie to the handle bars for extra storage (old school) or one those spring thingies on the back
Moto: saddle bags, storage (could make them out of leather/sewing kits)
Car: drop tank for extra fuel storage
and a gasifier( I think they call them), dooms day prepper on youtube made one, some big contraption that went on the back of the car that you chucked wood in to burn and used that as an alternative fuel source, like doc's DeLorean garbage thingy in back to the future
had a few more forgot to write them down, will hit yous up if I remember or think of more