Engine is Bogging? *video included*

[Kart09]

Video (issue starts at 7 seconds in):
https://www.youtube.com/watch?v=nFAE9jFdnZ8

Engine:
Predator 212cc

Preface:
I've recently installed an aftermarket air filter, bigger injector jet and straight pipe, all a part of this kit found here:
http://www.gopowersports.com/212cc-predator-performance-air-filter-adapter-upgrade-jet/

I had also taken the kart apart to do some cleaning and general tweaking and after putting it all back together the engine starts bogging under hard acceleration from a dead stop, and it also can't go faster than maybe 12mph (when it used to go about 40mph). Something seems to be restricting the engine, any ideas?

 

[bob58o]

Spray some starting fluid or carb cleaner around where the carb meets the head. Check for leaks. If leaky, the fluid should work its way into the chamber and alter the RPMs.

I dunno???
Maybe the gaskets aren't correct?