Showa shock issues - Harley Forum

roadking26 · #1 10-28-2008, 09:34 PM

Anyone know the correct amt. of oil required in Showa rear shocks ?
Thanks, roadking26

shovelmike · #2 10-29-2008, 10:53 AM

I have no idea how much oil they take. Have you got them disassembled for repair? If they are not apart yet get a beaker or measuring cup and pour the oil in there to measure the volume.

roadking26 · #3 10-30-2008, 06:36 PM

I picked up a set of dealer take offs from a street glide. The previous owner neglected to plug the shocks. I got them with most of the oil in the box instead of in the shock. There is no data available. I soppose I could bleed a stock shock and refill the 12" street glide with the same amount or a bit less as they are 1'' shorter.

shovelmike · #4 10-30-2008, 09:15 PM

That will do the trick. Are you lowering the front forks too? If not exercise caution as this will slightly increase the rake slowing the handling a bit. Be careful on corners with regard to ground clearance as well in either case.

roadking26 · #5 10-31-2008, 10:21 PM

I am planning to lower both sides. I need to research Arlen Ness's drilled dampers vs. the more traditional spring set up. Thanks for the info.

RKJohn · #6 03-22-2009, 10:37 AM

Rear Air suspention shock use 71/2-8 oz of shock oil that you can purchase ant any ATV dealer in several wt. oils. I tried 10 wt. but it made the shocks stiff. I would suggest a 7.5 wt.
john