Check your high speed needle to see if its loose. Run the engine up at full speed and see if the needle is moving on you. This is a common thing also. Like they also said on the clunk. On your nose landing the clunk could be stuck up in the front of the tank. Also the fuel line where it goes onto the brass of the tank could be split from when you hit and the tank was push forward.
ORIGINAL: mdavis223
Thanks for all the advice guys...
That's the nice thing about this forum... If it's happening to me, it's bound to have happened to someone else before...
I'll try the most obvious things first, like changing the glow plug, cleaning out needle valves on the carb and re-adjust the mixture again... I really don't want to pull the tank if I don't have to since it will require minor surgery to do so...
It's just so strange though... One day it runs fine, the next nada...