Official "Cheeky Plonker"
Join Date: Jan 2008
Location: Spring, Texas, USA.
I don't have a 98 1500. But.... I do have a 82 GW mongrel with an on-board suspension compressor and a 2002 Road king with air shocks.
The adjustment range on the 2 bikes is totally different. for instance, adding a 150lb passenger to the GW takes about a 10psi increase, the HD, 1psi. According to the book.
The HD adjustments are so small that using any powered means of adjustment made me fear for my seals, like hand pump only small, so I don't do it at all.
Hope this helps you.
For what it's worth and if I may be so bold? The current rebuild of the `80, `81, `82 & `83 GL1100STDASPENSTATE can be followed on classicgoldwings.com in a thread called "The plan is to turn 140,000 into 50,000."