RO5 - Rotor Road & Motorcross 
Kawasaki KLE400 (1991-1999 | A1-A6), KLE500 (1991-2007 | A1-A13/B6F-B7F)
OEM part no: 021003-1123 (GP9306) - 
Please check with your original rotor. 
The RO5 has 4 'protrusions' on the outside, 3 short and 1 long, (these trigger the pickup coil).