Last night I scratched a TDC mark straight across to the back flange
(closest to the block) and measured the distance from there to the 5 ATDC
notch.  I then painted a new mark (5 BTDC) the same distance on the other
side of the new TDC scratch mark. I set the timing at 5BTDC and adjusted
the idle.  (I was running at about 2 or 3  BTDC).  I must say, it runs
mucho better than 5 ATDC.  I took it out for a test drive and could not get
it to ping.  I do have premium gas in the tank.  I did not disconnect the
vacuum lines when setting the timing and had the idle stabilizer by-passed
as the Bentley shows.
I also tried starting cold with the idle stabilizer by-passed to see if
the Aux. air regulator was working--it was.  With the stabilizer connected,
it is hard to detect any change in rpm by squeezing it the way the Bentley
says to do.

                                                        Jay  '85 Westy