I know this is an old thread, but for me it was a great one. I am very inexperienced at mechanics, but want to do what I can for the $$ and for the satisfaction. My 08 Vector LTX was bogging at take off, and quit with a quick full-throttle from idle. I made one of these tools, and it worked great. I used Marvel Mystery Oil with the small nipple, which filled the line easily before any connections were made. I synched 1 and 2, then 1 and 3 (I call the one with the plug carb 1). Easy to do and running great now. Thanks for such a helpful thread.