The 2300 that I am currently running needed a little help with fuel draw. I suspected the venturi is too large for the rpm I'm turning, which is 9300. I made a sleeve from K&S tubing, reducing the barrel diameter by .030". This mod made the needle respond noticeably better. Now I can set the needle for a rich two-cycle on the ground and finish the tank with complete reliability. I am using 5% Omega, stock muffler, stock plug, and a 14 oz tank mounted close for 10 minutes in the air. After some run time and carb tuning this engine has become about as user friendly as my trusty OS108, and thats tough to beat.