Jim:

Here is a dual-vanos repair DIY I did back on 2/14/08.

I would recommend doing this at home in case something brakes, you need extra time to clean, you find other WYIT stuff.

Been through two winters, no cold idle jo;t stumble, great mileage, torque (what torque) is back. 1st or second best repair / restore I've done to my touring behind replacing the rear carrier (subframe) bushings. *

Good luck and PM / Email if you have any Qs.

*Have the special tool for carrier bushings removal on tourings in case people are interested.