Dirt girl, I think this project is way beyond your skills.
What's with the wrench? Is that part of the rear frame?
You need to see in your head, every piece of your project, and
how they work together.
You need to know exactly what to search for, and buy.
Will the 212 engine fit in your frame?
If you don't have the engine, you have to find the dimensions (length, width, height) of this monster engine,
then measure your frame to see if it fits.
You will need to remove the seat post and brace(weld) the frame.
The bicycle chain will be in the way of the engine.
You will need to weld brackets to re-route the chain.
Can you weld?
You're wanting to run 212 power thru a "shift kit".
Yes, that's the term that's used.
You have to MAKE the jackshaft, and choose the correct sprockets on the jackshaft.
It is IMPOSSIBLE for you to run the engine sprocket/pulley directly to the bicycle sprocket.
Why? You'll find the answer, when you learn about sprockets and pulleys.
You must choose the right bike sprockets and pulleys.
You need to learn about GEAR RATIOS!
You need to be good at junior high math, to calculate(figure out) how to
choose the correct sprockets and pulleys.
The monster engine will interfere(be in the way) of the bicycle chain's path.
Others on the forums have completed this project, but
not with a shift kit.
You have chosen a VERY difficult project.
I'm guessing this will cost at least $1,000 to build.
Yes. I AM trying to talk you out of this.
Why don't you try a cruiser bike or a simple mountain bike and a China engine as your first bike?
And no shift kit.