Replacement manufacturer part number: 1125 640 2000, 1125 640 2004
Crank Diameter: 10 mm, Drum I.D: 2.985"
Pitch: 3/8", Teeth: 7, sprocket bearing:10x13x10
Fitment models: 029 034 036 039 MS290 MS310 MS360 MS390 034 Super
Package include: 1pc sprocket drum cover, 1pc bearing cage