How do you remove the engine gear on a Harley?

what year, what model, what size? However, almost all harleys; put something it between the primary chain and the clutch hub like a piece of hard wood. Remove the nut holding the gear by turning it counter clock wise. If the chain is good, you will have to remove the front gear and the clutch hub with chain all at the same time. If you can remove the front gear from the chain without removing the clutch hub, the chain needs replaced.