Bob@(some hp site) was asking about slow jets,
and I lost his addr.  Anyhow, I stole this out
of the Oct (94?) Thunder Press' Motohead Memo, by
Kip Woodring (reformating and typos mine):

Recently updated to include info dug up by Don Crafts
from WorldWide Glide, and some info I got out
of H&M Harley Davidson's catalog.

This list only applies to 88 and later Sportsters and 
90 and later Big Twins with the Keihin CV carb.  This is not for
older style Keihin butterfly style carbs.

Jet Needle (mid-range) in decending order Rich->Lean

27175-90                N72R            Rich
27176-90                (CA Only)         |
27178-90                N72S              |
27179-90                (CA Only)         |
27184-92                N86F              |
27186-92                N86E              |
27280-92                (CA Only)       Lean


Pilot Jet (low or slow speed) 

27165-90                48              Rich
27170-89                45                |
27171-89                42                |
27281-92                40                |
27117-88                35              Lean

Main Jet (high speed)

27105-88                200             Rich
27185-90                185               |
27114-88                180               |
27090-89                175               |
27115-88                170               |
27116-88                165               |
27152-89                160               |
27154-89                155             Lean

Kip mentions that this was a tough list to compile,
as The Company provides only part numbers, no sizes
or any other info for this stuff.  Thanks Kip!

For CA folks, Thunder Press is free at motoshops
everywhere.  Non-CA subscriptions can be had.
Contact Thunder Press via email at: thndrprss@aol.com.