Dang dude, and I thought I was the king of overpowering! hahaha... I can imagine that engine ripped that Uci around big time!
ORIGINAL: MIXMASTER
Maybe the 1.80 is different, several here have had the 1.35 & experienced the same transition issues, all kinds of carb mods were tried but none worked. I ended up with OS 7D carb on mine & it worked well with a Cline on my .60 UCI.