Because they will not fit my 06 raptor 700 with the factory brake caliper the bolt holes are too far apart and when I contact them they pretty much tell me them are the right ones funny thing is I go to Yamaha place and buy the same brakes but they will work for my factory brake caliper that the man I talked to say had to be aftermarket try to tell me whoever owned it previously you must have changed it but I'm the only one that owns it since 2006