2006 Arctic Cat ATVs 400/400TBX/400TRV/500/500TBX/500TRV/650H1/650 V-Twin Service Manual, Page 162Get this manual
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11 Install the secondary and primary driveshaft assembliesAccount for the bearing alignment C-ring on the bearing boss next to the pinion gearNOTE: Align the bearing alignment pin on the secondary out