i know my tsunami runs awesome till it shifts then it kinda just levels off doesnt accelerate anymore. try running your trans screw all the way in so it wont shift. maybe yours is shifting and bogging. there is another thread where ehroof talked about the tsunami being geared too tall and the stock motor cant really pull in second. i know im going to change my gearing like he specified in the other thread. check it out when you get a chance.

my carb is set really rich compaired to my brothers tsunami at first. mine is like 2 3/4 turns on the bottom by the linkage and 2.5 turns on the top. my brother was running at just 2 turns out up top and 2 1/4 on the bottm. then he took the baffle out of the muffler and retuned it (closer to my settings) and that thing is so stupid fast now its unbeleiveable...