2004 Polaris Pro X Factory Service Manual, Page 192Get this manual
REAR SUSPENSION Shock Travel Bar Explanation The SHORT position of the travel bar is the most progressive set up and will initially use less resistance at the beginning of the shock travel and use the most resistance at the end of the shock travelStroke per travel increases as vertical travel increases, so at full compression you use more stroke per travel than imitableThe MEDIUM position is not as progressive as it is in the short positionThe LONG position is the least progressive and will initially use more resistance at the beginning of the shock travel, and will use less at the end of the shock travelIf shock bars are used in any other configuration other than the ones listed on theshock decal damage to the suspension or shock will occur