2007 Arctic Cat Four-Stroke Factory Service Manual, Page 345Get this manual
1Properly align the scribed line on the driveshaft (from removing) with the timing arrow on the drive sprocket; then slide the sprocket onto the driveshaft as far as it will go
4Using calipers, measure distances between the sprockets and from the sprockets to each end of the driveshaft for proper location (see illustrations)
2Using suitable press and fixture, press the driveshaft into the sprocket until it aligns with the line scribed in removing