nitrovulcnse

hey. i just broke both of my plastic diffs in my vulcan, so i bught the steel ones. they went in pretty easy, but the striped out almost emediatly during the first run. was i suposed to go through a break in procedure or something? is there a warentee on the gears? are they made of super cheapo crappy metal, or were they just painted plastic? also would i break something if i lock the diffs, becasue ,i jb welded the plastic ones together and i wanna try it, but i wanna know if it would break into a billion tiny pises.[:@][:@][:@][:@][:@][:@][:@][:@]