this gurgle at knife or inverted is not to be fixed with the needles!!!!!!!

the reed block needs changing..... the std reed block is plastic and it doesn't allow the fuel to burn evenly with the rest of the engine as it retains heat differently. the newer aluminum block from AI will do the trick.

right now you have excess unburnt fuel being dumped into the cylinders when going to KE or INV. the plastic reed block will get up to temp a few minutes into the flight and this will happen less and less. i would assume that you are tuning the needles between flights and the engine is getting warmer and warmer....thus eliminating the issue. the needle adjustment isn't what is fixing you issue...heat is.

the alum block heats up at the same rate as the rest of the engine therefor there is NO extra unburnt fuel getting dumped into the engine at KE durning any part of the flight!!! it is about a $40 or so fix and VERY easy to do!!!!!

make this adjustment and you will have the best 100 class engine out there!!!!!!!!!!

matt