New, was on back shelf. Kawasaki KX85 51 Rear Sprocket KX 80 KX 100 Rear Sprocket JT 51 Tooth.

# 55-46151 # JTR461.51

Fits:

2001-2020 KX85

2000 Kx 80

1998-2020 KX 100

1998-2000 KX 80 big wheel