125-200cc Help out the slow kid in the class, what is this?

I've had my '14 CR125 for about a year and was thinking about putting the 144 kit on. I pulled everything out of the box to and found a bag of what I can only assume are spare bolts and clips and two things I have no idea what they are.



I'm not sure what the round clamp / retainer ring thing is.



or what this spring loaded thing-a-ma-gig is




Feel kind of silly asking but would certainly appreciate some help.

The round clamp and the spring loaded cajigger go together. It is a holeshot device and would install on the fork leg (the clamp goes on the fork tube and the springy part attaches to the fork guard).

Awesome! Thanks for the replies!

I've been looking through the 144/165 install threads and there are two other things in my bag of parts I'm not 100% sure what they are for.



The small black rubber bushing or gasket and the pin. I didn't see either mentioned in the threads. This will be the first time I've ever done a top end on a bike. In case that wasn't obvious.

I believe the seal is for where the power valve rod goes into the jug.

The pin should go in the jug to hold the rod in place.

*edit* #27 and 28

Thank you for the help! I think I've got it now.