| I've seen several GAK
threads and questions lately. I wrote up my recent
installation experience. (Sorry for the length!) I cut and
pasted from MS Word, so the formatting may not work out.
Zach’s Extra GAK tips for the layperson.
Experts will laugh, but these are things I bumped into.
Maybe it’ll help someone.
1. Assumptions:
a. You do NOT have stock pipes. If you do, stop here. The
GAK is specifically not recommended for use with stock
pipes.
b. You are a non-mechanic who wants a performance increase.
You’ve had the air cleaner off, and you at least know where
the carburetor is. If you’re a gearhead from way back, you
don’t need any of what I’m saying.
c. You are slightly intimidated that the GAK comes without
any printed instructions included.
d. The installation instructions are found online. READ THE
DIRECTIONS CAREFULLY. My sole intent here is to augment
those directions.
e. You’re doing this work without taking the carbs off the
bike. If total removal is a choice for you, I recommend it.
You’ll be beating and banging to remove those 16 well-stuck
brass screws; eventually I knocked the carbs off of the
cylinder port hoses. The screw removal pain would have been
way easier with the carbs off the bike and in a vice. The
carbs have various lines running to them, and I just didn’t
trust myself to completely take the carbs off and get them
back on correctly.
2. As noted elsewhere, I am stupid. I
did this work with the bike leaning on its kickstand. It
(particularly the left side) would’ve been way easier on my
back if I had utilized a bike lift.
3. Remove seat, speedo, and gas tank.
Remove bagel and air boot; they will no longer be used.
4. Remove air box. There are two
“invisible” hose clamps held by two “invisible” JIS screws.
The instructions do not show a picture of them. Get at them
from left side; I used the bike’s screwdriver without the
handle. Note that the air box will not be reinstalled.
5. Go ahead and install the small GAK
filter on the crankcase breather, as directed. Don’t bother
putting the bigger filters on top of the carbs right now.
You’ll be moving the carbs around enough that the new
filters probably are not gonna stay on, if you place them
now.
a. The instructions say to oil the filters. However, if you
receive Emgo filters with your GAK kit (not K&N brand),
disregard the filter oiling instructions.
6. Right side carb cover removal. The
mild beating of the brass screws worked for all the screws
except one, which required drilling and screw extraction.
Note that the front carb has an additional screw and fitting
(which guides a cable) at the lower right that must come off
to get to the lower right cover screw. (The pictures show it
already removed.)
a. There are instructions out there on building a special
drill/screw bit to remove the brass screws. Or you could
probably buy something similar. I wish I had; might’ve saved
that screw extraction fun.
7. PMS (mixture screws). When you’re
seating these (before the 3.5 turns deal), do NOT
over-tighten them. I removed mine completely, and got new
ones from Tim at MetricMagic.com . (The stock rear PMS screw
would not come out, which lead to another screw extraction.)
8. Washer shim installation. First
tricky thing is getting the stack (needle, black seat, new
shim washers, and circlip) re-inserted in the vacuum slide.
I finally used forceps to re-insert it. The white spacer
will basically stay in the little spring, so I grabbed the
spring with the forceps and put that in. The instructions
say to break the nub off the bottom of the black seat; I
found this unnecessary. Just drop the needle assembly back
down in there and gently rotate, until the nub finds its
little space. The second tricky thing is to re-install the
white needle cap. One’s fingers won’t fit down in there, and
I couldn’t think of anything to grab it with. I (finally)
used a fold of Scotch tape (sticky side out) on the end of a
flat screwdriver. This sticks the needle cap to the
screwdriver blade, and you can find a way to get it started.
I used forceps again to get the Scotch tape off the needle
cap, then tightened the cap normally.
a. Additional tip: The needle shimming business is best done
in good light, on a table, while working over a shallow box.
These pieces are TINY, and you ARE going to drop something.
b. Best tip: You will be proud that you were finally able to
get the right-side covers off, disassemble and reassemble
the needles, and reinstall them with the diaphragm fitted
correctly. You will have set the long slide spring aside
somewhere. Don’t forget and reinstall the carb covers
without the springs (not that I did that—BOTH TIMES!)
9. On the left side, I again had
trouble with one of the eight screws. I was about to give up
and get the drill and extractor after it, when it finally
came. Jet replacement is just as described in the
instructions. Except, my rear one was stuck. The stand-off
came out with the jet still in it (apparently, I didn’t hold
enough force on the back-up). If this happens, be aware of a
tiny copper washer that goes with the threads of this
fitting.
10. Optional—skip this if you’re
keeping the bagel for looks. Remove the lower bagel bracket
on the right side of the front cylinder. The upper brackets
extend under the head covers. Removing the head cover, you
can see those brackets go way back to the other side. Seeing
no way to remove them, I gave up and just stuck bolts in the
upper bracket holes, to look “official”.
11. If they did separate from the
bottom of the carbs, as mine did, loosen the hose clamps
from the cylinder port hoses. Reattach the bottom of the
carbs to them. When they seat fully, you’ll feel a little
“snap”.
12. Now, you can install the Emgo pods,
put the bike back together and carb sync. Carb synchronizing
is a separate article at
http://www.stargis.net/webslinger/Docs/CarbSync.pdf .
The article tells you how to carb sync, as well as how to
rig up a homemade manometer. I think (remembering we’re
laymen, here) one would be better off buying carb sync
gauges (which I did). The sync adjustment screw is not the
easiest thing to find.
13. So, you’re finished now—but what
are these extra stainless washers that are left over from
the GAK kit? They’re bigger than the ones you shimmed with,
and have no apparent purpose. Looking back to the kit
contents list, I see “stainless washers to space off the
choke screws”. That confused me, so I emailed Ziv himself
and Webslinger. Both answered. (Ziv answered in about two
seconds; how’s that for customer support!) “Sometimes the
longer screws that hold the carb covers (left side) will
interfere with the choke/TPS. It doesn't always happen, but
if it does, the washers are included to use as spacers.”
Mystery solved. Test ride, and have a beer—in that order,
please! |