Team Thornhill Nitro caps.
No more need to worry about putting after run in your motor or even running it dry after each race day. Just remove your air cleaner and put the large pipe cap over the carburetor, then one of the pipe caps over the exhaust stinger (2 sizes included depending on the size of your exhaust)
This will seal your motor off from outside air as long as your tank is closed and your fuel and pressure lines are connected. With it sealed off it will keep air and moisture out of your motor which degrades the fuel and allows bearings to rust. Stores motors effectively for up to a few months without worry.
Comes with 2 carb caps for .21 size carbs, and 2 different sizes of exhaust caps (2 of each)