2007 Arctic Cat Four-Stroke Factory Service Manual, Page 75Get this manual
! NOTE: The corresponding letters on the crankcase are located to the upper-left of the oil filter AO351A
3Using the chart below, select the proper main bearing setCrankcase Stamping
Main Bearing Selection Engine Case Code Crankshaft Code Brown Green Black Green Black No Color Black No Color Yellow Right Front Balancer (A or B) Right Main (A or B) Right Rear Balancer (A or B) Center Front Balancer (A or B) Center Main (A or B) Center Rear Balancer (A or B) Left Front Balancer (A or B) Left Main (A or B) Left Rear Balancer (A or B)
! NOTE: Bearing journal #3 is different from bearing journals #1, #2, and #4! NOTE: There is no bearing selection for the connecting rod big endOnly one bearing set is available
Crankshaft Stamping
Left Rod Journal (1, 2, or 3) Left Main Journal (A or B) Right Rod Journal (1, 2, or 3)