For these disc you should use an adapter when your bike is before 2015:
CR125/250 95-03/CRF450 02-03 you need adapter 8211001CR125/250 04-07/CRF250R/CRF450R 04-14/CRF250X 04-../CRF450X 05-.. you need adapter 8211002
Series Flame
Outer diameters 260.0 mm
Inner diameter 101.0 mm
Thickness 3.1 mm
Number of holes 6
Hole diameter 6.3 mm
Pitch 117.0 mm
Type Floating disc with steel inner carrier
Turning direction Left Side Mount
Speedometer prepared No
Color inner ring Stainless Steel