Method 1: (JA)
1) First back off the idle screws
till they don't touch the slides.
2) Carefully screw each one in until
the screw just barely touches the slide.
3) Turn in each screw the exact same
amount, until you get your target idle number.
If you don't do this first, the little variance you get when setting the
idle screws will affect slide height and the sync will not be "spot on".
4) Make sure you have slack in the
cables.
5) Put your middle finger of your left
hand on the center slide, and your thumb (left hand) on the right slide. Turn the throttle very slowly and feel if
the slides lift at the same time. If
not, adjust one or the other cable so they do.
6) Snap the throttle a couple of times
to make sure the slides are setting in well, and tighten the cable lock nut and
recheck.
7) Move your thumb to the center slide
and your middle finger to the left carb.
Adjust the LEFT carb till it lifts exactly with the center.
8) Snap the throttle again and make
sure the lock nut is tight (tightening the lock nut will change the slide
height).
9) Take out any extra slack in the cable, AND check the oil
pump for correct setting.
I use the finger method because a finger can tell movement
in thousands of an inch (just say very accurate). I prefer to set the sync from idle, because that is where I feel
it is most important.
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Method 2: (mraxl)
1) Find a smooth round pin about
3/8" or 10mm dia. (I use the shank of drill bit)
2) Remove air
box/filters.
3) Back out slide stop
(idle adj) screws.
4) Set throttle lock or
set throttle adjuster at the grip so the pin will just lightly drag as it is
inserted in the carb throat under the slide cutaway of one carb.
5) Set the other carbs
so they offer the same resistance when the pin is inserted by setting the cable
adjuster at top of each carb.
6) Release throttle lock
or reset throttle adjuster at grip insuring that slides on all carbs will fully
bottom out and throttle grip has 2-3mm play.
7) Set air & idle
adj screws per manual for best idle.
As a final check to
insure all idle adj screws are set the same, insert a nail, spoon, or long
toothpick under each slide without altering slide position. As the grip is turned the ends of all three
should tip at the same time. Readjust
idle screws as required.