The first time you grease the left front Zerk fitting... It will take a lot...
09 flhr two years old in August this year.
I Just did mine and waited WAY to LONG to do so.. Put it OFF put it OFF put it OFF.. Now Greased (syn red) It SURE felt different in a good way.. I DOUBT HD does anything More than Pack the bearings when putting it together... and the Big Neck chamber is DRY...
Like TQ1 says annual for me from now on..
When I pumped the grease in on a cool day, It filled and I stopped right when it Came out the top and bottom bearing Just a LITTLE and No Mess was made.....
Thanks for asking your question,,,,
as I would SUGGEST all to DO as I say NOT as I DID.. Don't wait FILL right after you BUY the New Bike and KNOWING then the grease is Full inside the neck...
signed....BUBBIE