2007-2008 Polaris IQ Snowmobiles Service Manual, Page 196Get this manual
PVT System DRIVE CLUTCH
Identification
Every clutch will have the last three digits of the clutch part number etched on to the cover (A)The "X" (B) marking is an index mark where the clutch cover (C), clutch spider (D) and the stationary sheave (E) should line up when the clutch is assembled