DOES NOT FIT NEW OUTPUT SHAFT ON 2021 MODELS ONWARDS! New bikes are part number 8539
Fits all model SEF 450 & 500 models as well as the SE 250/300 2-stroke models from 2004 to 2020
This is the front sprocket that has a locking tab washer slot
Sherco Part Numbers are:
B/0192
B/4730