I have a brake disc and and caliper for it from a 2001 ML 500 (fan). This is pretty light, weighs in at 1,5 kg (3,3 pounds). I'm sure the one in the 1997 sx twin is much heavier, because its "double ventilated"? and is much wider. I could potentially save alot of rotating mass if I swap this over. Is this a bad idea? Will it go hot because it is just a single disk and not "double ventilated"?