I love the 4 Strokes but I am considering getting into some pattern competition via the SPA and they don't allow YS engines!
I have a ThunderTiger 4 Stroke and love it, but it has a huge flat spot from just above half throttle to full throttle. As you can imagine it is hard to do consecutive loops with this flat spot. I understand this is a problem with all 4-Strokes except the YS, though I suspect it is worse on the ThunderTiger.

I have considered taking the choke adapter off the TT and using an ocilllating pump to make up for the loss of suction. Anybody try this?