What are these parts that came with my kit?

[Emcee]

Still have 2x bolts and this black thing. I can't figure out what it goes to.

The 10mm socket in the photo to use as a scale to the size of the bolts.

 

[Wrench]

Tool for your engine

 

[Emcee]

Tool for your engine

What do you use the black thing for? And how are two bolts used as a tool?

 

[Chainlube]

That's a gear puller. The outside portion screws into the gear and the black bolt screws inside of that. The sprocket on the left side of the engine has threads inside and that thing screws in, and there is a gear on the right side under the clutch cover that the other end fits into.

Don't loose those two pieces, put them with your other tools.

 

[Nickt919]

That "tool"....It removes 3 things... the drive sprocket, clutch, and bevel gear.
The threads are super fine and shallow on this tool and the parts it removes. If you attempt to use it be sure to thread the tool in deep enough or it will rip the threads out instead of removing the part.