2004 Polaris Pro X Factory Service Manual, Page 35Get this manual
GENERAL INFORMATION Crankshaft Indexing
Polaris crankshafts are pressed together or indexed" so the connecting rod journal center lines are 180 (twins)It is sometimes necessary to check multi-cylinder crankshafts to verify that one cylinder has not been forced out of position relative to the other cylinder or cylindersCauses for out-of-index crankshafts include but are not not limited to: