Every time I try the Gyroscopic flop, my yoyo dies the second I start pulling to make it rotate. I am using a YYJ Hitman with all the stock parts. Any tips to make it work better or do I just need a better yoyo/bearing? Thanks.
chances are, you are pulling too hard. If you pull too hard you will lose control, not enough and you wont get a flop, another thing to practice is not allowing the yoyo to come out of line with your hands if so you will spin out and have a mess of string to fix. Try pulling a little softer, and of course make sure that the strings are wrapped properly to cause a flop. Hope this helps 
Just keep the walls of the yo-yo of the string and pull with I’d say, 2/3 pounds of force. Anything else would be too much.
Search “help with gyroscopic flop” in the search and you will find every tip for that trick known to man.
Then you must learn from the penguins, man knows little.
…huh?