Is it possible to fit a motorcycle engine onto a bicycle frame?

like my dad told me when I asked him if a certain motor would fit a certain car " you can make anything fit as long as you had a cutting torch and welder" , He was right too!

Anything can be done with enough metal and a welder

Hell yeah. Anything’s possible with some welding

Depends on size.
Not only what she said

Sure with a cutting torch and a welder.

Try lawnmower instead. It will fly.

Not with that attitude

Sure.