John;

Your '85 should be a 1.9L vice a 2.1 unless you've had a conversion done.
The idle adjustment is done using a large flathead set screw just below and
in front of the set screw you're looking at.  My Bentley manual says the set
screw on the linkage is set at the factory and shouldn't be tampered with --
I'll take that as gospel unless in dire straits.  The idle speed for the 1.9
should be 850 rpm (+ or - 50).

Chuck
'85 Westy (Roland) Idling fine at 875 rpm

>I was wondering where the idle adjustment is (is it just the set screw that
stops the >mechanism from returning all the way)?

>And what is the proper idle speed for a 2.1L Waterboxer

>Thanks john