if you have someone there they can watch the rotor to see if it's aligned correctly. it took me less than 30 seconds to get it. i don't know about breaking the rotor off with pliers but if u got no choice then i guess it's ok. the hard part about replacing the rotor is that fucking screw. it's such a bitch to get it loose. like a lot of u i also stripped the shit out of it. i had to use a drill to make new screw slots. then i was able to take it off with a flathead screw driver. i replaced it with a new screw.Cautela said:You can do that if you want but it'll take you hours to get it right... why do that when you could just break the rotor off? you're gonna replace it anyway. Another less simple way of doing this is by turning the crank until it lines up right but I don't recommend it.