The stock motor makes it look like it cant get out of its own way. But at bajafest in september Adam Drake Ran a BZM in one and Greg Vogal from Rc driver ran a Dogpile Wild child and both of them were flying!!
Hpi had there prototype 4x4 1/th scale at baja fest back in september. All in all its just a 1/5th scale savage flux.. with sc body and tires on it. The losi 5T is the way to go because i don't think anyone can top the design because the 5T is there truggy just blown up biggger. and they are one...
In order for everything to run proerly with the hpi sway bar you would need the following.
-Full set of savage x,xl a-arms
http://www.hpiracing.com/products/en/85238/
-2 savage x,xl composite bulkheads
http://www.hpiracing.com/products/en/85235/
then the stuff that you need to use to...
The battery you have now might be out of juice. How long have you had it?
You might need to kill it completely then take your wall charger and plug it in and let it do its thing.
Also the baja battery would work but it wouldnt fit int he stock radio box, you would have to mod on or find...