I've had a tiny leak from the 6mm screw above the axle on my left fork. As the oil has been lost, so has stable handling in even moderate twisties. After several months of "frog in heating water", I put the RKC on the jack and stripped down the front end. Found the o-ring on that screw was damaged so I replaced 'em on both sides, and removed both tubes for inverted oil draining, as removing those screws doesn't get it all.
After reading several fork oil posts here, I opted to skip H-D E-Type fork oil, and went with Spectro 10W. After an extra tear-down of the headlight/nacelle (forgot to install the donut bumpers on the fork tubes!), I put the fender and wheel on, and took her for a shakedown run. The front end has never felt so stable and solid; no more squishy feel. Maybe the heavier oil works better with my chubby butt. If you're on the heavier side, or regularly toting a passenger, you might wanna try the heavier stuff next fork oil change. So far, no more leak, too. FWIW.

 

Yep, heavier oil makes a big difference. I did this to mine about 20k ago and wished I had done it sooner. Takes a lot of that front brake dive out.

 

That sucks! At least you realized it before you started riding!

 

Approx how much oil, per fork does one need fire this?

 

Per tube: Road Kings, 11.1-oz...other Touring, 10.8-oz. These were the amounts listed in my 2007 Touring Shop Manual. The Spectro comes in a by-god Liter size bottle, instead of a quart like every other oil I've ever purchased.

 

my 2011 SG took 10.8 as well and the most retarded thing measured in liter instead of by quart like evey other bottle made lol

 

Why its downright Un-American...

 

Damn straight; but in my mind, I've convinced (deluded?) myself I got a little bit extra oil for "free", over a quart bottle of fork oil.

 

I need to do this

 

When I changed out my fork sliders recently to chrome I tried some Amsoil Shock Proof Therapy 10w. Made a big difference in front end and took out that squishy feel and dive when applied front brakes hard.