i would recomend buying an avenger swingarm.
there the best.
call them and ask for edwin, he owns avenger and hes a great guy. tell him peterlocal22 sent you. he built me a custom swingarm for my banshee over a yr ago. came out awsome. if your racing in the desert you want his swingarm because thats what his specialty is, desert racing. ask for the baja racing 3/4 inch skid plate tabs if your going to have a skid plate. there bulletproof. shoot me a pm if you need his number,
peter