Join Date: Jul 2015
Location: Haltom city Texas
The oil takes up air space in the shock and acts as a barrier to keep air in,
I just looked at Progressive site and it calls for 2 oz of dextron,
,bout the only "rebuild" for the 416's is the replacement of the oil seal and oil refilling... The oil seal wouldn't qualify as a littl o-ring, so consider me a +1 for what Dale Sr. posts above...
Sadly, progressive has redesigned their site and made their instructions a bit more difficult to find.
This PDF is the installation (the 2small o-rings are seen at about step #9):
This PDF presents the seal removal and replacement... Generally, when I refill these I'll use 4oz - 6oz of oil for the GL1500 if it's used a lot 2-up, towing, or with a heavy bag load. :
Hope this is some help
Love chasing white lines but they are difficult to catch.Hate drivers with no STOPLIGHTS.
1968 Kawasaki Avenger
1969 H1 Kawasaki
1991 ST 1100
1991 SE Goldwing.
1995 BMW R 1100RS