Ok so ive got a F5, just put D&D twins, D&D clutch kit and V-Force also 1.5 timing key. the problem i am having is the low end bog. if the sled is even on the stand when i got to stab the throttle it bogs slightly then snaps. It has a yellow primary purple secondary, with 51 gram notched weights. what am i doing wrong.i have played with the air fuel screws also..any ideas? thanks.