I have posted before but tube length is a common question. This is from the BK Rider ad on ebay. I got the '86 to '99 tubes from them.
41 mm Fork Tubes
1984 & later 41mm fork tubes are all the same with the exception of total length.
FLT 1984-1996 22-7/8"
FLT 1997-later 20-1/4"
FLSTC/N/F 1986-1999 22-7/8"
FLSTC/N/F 2000-later 22-1/4"
FXWG ,FXST/C 1984-1999 24-1/2"
FXDWG,FXST/C 2000-later 24-1/4"
Our fork tubes won't work on some FLT models 2002-later use cartridge damper on the left side.
Here's the link to Ken's how to site. He has the long tubes with extended cowbells. Looks odd to me. I am using the 12" Street Bob shocks but will be putting on 12" air shocks because they will be easier to adjust with my bags hard mounted.
http://www.kenandjudy.us/MyHarley.htm