I came from a long travel KFX450, am 5'8" and 190.  I love the Zilla too.  So much more stable for my style of riding (fast sand dune carving).... and all of this on stock a-arms and a stock swinger.

Once I can get the front end setup the way I want, it should be the perfect quad.  Get these jetted right and they will start with one kick starts always!