Hello,
Can someone tell me how much oil the 12" air shocks take in each side?
Thank you.

 

I refilled a pair for a friend who left them on their side and most of the oil drained out. It's a PITA job, but I think I got about 220 cc in each

 

Here's a couple of links to help:
https://www.hdforums.com/forum/showt...ght=rear+shock

https://www.hdforums.com/forum/touring-models/129136-making-the-stock-shocks-better.html

When I did mine, I just drained them out and put the exact amount back in. Don't know the number of cc's, but yes, it is a PITA... Much better ride now though.

 

I came across that long thread by TBH and lot's of info in there. Not much on how much oil though. There was one post that says 11.5 ounces, but I would like a concrete answer. Then there were also some posts in that thread that warned of doing this to the shocks.

 

i emailed cliff piper at piper performance and he says the 12" needs 350 cc of fluid. i found silkolene pure synthetic oil at 10 wt. at my local metric store. i also found a 1/4 x1/8 hose barb to go into shock fitting and attach hose.

 

Concrete is the answer!

 

Just a thought here...
Blue
I sent you a PM
Its been established that the 13" gets 325cc-340cc
now with this said...
Why wouldn't the 12" get the same?
They use the same upper portion of the shock...
The shocks are the same with the exception that the 12" have 1" less travel then the 13" which seems to relate to the shaft that attaches to the swingarm would possibly be 1" shorter...
If this is indeed the case then the oil capacity would then be the same but if its not then the oil level would be less...

 

sounds reasonable tbh. my thoughts were if the amount is the same then the air chamber would be much smaller resuting in a stiffer ride with just a small amout of air.... i suppose i could start with 325 and see how it goes