DOES NOT WORK WITH PREDATOR 212CC ENGINE unless you buy new bolts for it. I didn't notice, but it does say that in the description so I can't really subtract stars for that. The whole kit is awesome and works great when you get the correct bolts. The strange part with the Predator 212 is that they use SAE bolts, Not metric! It took me a while to figure it out, but once I did it was easy enough to get the correct bolts at Home Depot or your local hardware store. My go kart went from a bogging slowpoke unable to make it up a hill to a quick starting easy to drive machine that still has an excellent top speed. I couldn't be happier, but wish I had noticed you need different bolts before I purchased this kit.