You are the 1st person I have heard of breaking a shock while riding...That doesnt mean that 450 shocks are junk either. Did you hit something, maybe a hole when it broke??
I think what you have here is a set of snowmobile shocks man..THey look like these...
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=230426948026&rvr_id=&crlp=1_263602_263622&UA=WXI7&GUID=d54dcc721260a03661c2dda2ffa8cd9c&itemid=230426948026&ff4=263602_263622
I thought you were supposed to repack 2 stroke silencers every 40 hrs or somethin like that dependin on how much you ride. There's no way around oil gettin in the packing since your burning oil in the gas so the exhaust fumes will have oil residue in it.
Just buy a new Hotrods man..You won't be able to rebuild it yourself unless you have a shop full of tools and for the cost of getting it rebuilt you might aswell buy a new one...Or get a used one out of a newer Banshee..
I had a twist on a Warrior I used to have..Several time it about got away from me from hittin a little bump and my wrist twisting down pinnin that fucker wide open. I personally wouldnt recommend a twist throttle on a quad..Too risky..But to each his own.
Goto GOOGLE and type in Banshee shop manual...You can download and print a free copy of a manual from several shareware sites...That's what I did..Don't recall which site I used though..