[Danimal]

HI joshy
Those plastic gears in the stock servos are pretty easy to strip. There are rebuild kits available but you would probably be better off just replacing it. Actually if you can swing it I would recommend replacing all your stock servos with better quality ones. You'll see a defonetly improvement in the way your heli fly's. Those stock ones are a little bit slow, lack in torque and never center quite right.