What an XR100 rear shock looks like when cut open? I did, so I cut one open. I will be putting it back together too.
You can see the small spring at the bottom? That is a cone shaped one. That is the compression valve. I might have to get a shim that will go under it. Ha/
More importantly, what the holy hell is going on here??? https://www.flickr.com/photos/98577932@N00/16442520300/in/photostream/
Believe it or not that is a teachers and that was a class engineering project. They also build electric cars and off-road motorcycle powered stuff. He rides with us on the mini bikes I have yet to see that bike in person yet.
There is a company out of Wisconsin (I think) that makes efi kits and efi and turbo kits for small engines.