I have a 1982 Honda gl500 silverwing and last year I had the front fork seals replaced. They lasted about a month and the left one started leaking again. Now the local repair shops tell me that 1. this is a common problem with this cycle, 2. They don't work on cycles this old any more, 3. one way to "fix" this problem is to use a 50 wt racing oil and very low (if any air psi), and 4. I was told to just add 11 oz of 50 wt per side.
I am 76 yrs old and not mechanically up to snuff on Motorcycles. so my real question is how do I add the heavier oil without tearing the fork all the way apart? Or is this not really a good fix?