•••••••
nI25G.CUTYOUR
BOSS DOWN TO SIZE.
If you ride aYZ12SG,bere's
a modification that couldn't
be simpleror more important:
grind 3mm offthe left-side '
floatbowlboss (16).That's
the left side as you sit on your
bike and lookdownon the
carburetor.
Grinding offthree silly
little millimeters willprevent
the carb frombouncing off
the transmission housing
under extremelybumpy conditions. And that, in tum,will
preventfrothing of the gas
and the possibility of a lean
fuelmixture.
n25OG.NEEDLE
THECOMPEIITION.
The Competition Support
Department has found,after
many250-elass races,that
switching toa Q·O (Q·zero)
main nozzle ( 7) results in a
more useful powerband on
manycourses.
• •
HERE'SA
RACE-PREP PROGRAM
YOU'LL WANT TO
(19)between the reed cage
THROW A WRENQI
(20)and thecylinder.
lmo THE WORKS.
The spacer givesthe 46S
No matter howwellyou ride,
a longer intake track,which
you'renot going towin many
means a smoother power
racesif your bikedoesnt keep
response across the power
running strong, throughthe
band.Andthat means running toughest races.
a better race if your riding
That s whyyou should
style is helpedbysmoothness. take every opportunity to
To add the spacer to the
checkout your scooter and
intake track,get two new inmake sure things are adjusted
take manifoldgaskets and put right, tightened, oiled and
one between the spacer and
greased to specs.This program
reedcage(21) andone between of race-preptips should help.
the spacerand cylinder (22).
Andremember,ifyou have
Then use 30mmallen bolts
anyQuestions, ask the Com(23)tosecure thenewarrange- petition Supportexpert at
ment,instead of the standard your localTeam Y
amaha
20mm bolts.
Center. He knows all about
The spacer isverysimple
wrenching victory fromthe
to add and most riderswill
jawsof defeat.
find it very helpful.But there's
one little catch:you must have
the aluminumspacer made.
Thmaha doesn't sell it
10. H-1ten you slip theouterfoam
airfilterelement overthe
strengtheningring, rotatethe
....~~:::=o-_..,j, element 90 degreessotheholes
_.
ori inall use forthestuds
g
y d
willjit over the tabs.
Thenpunch newholes
in thefoam element
forthestuds.
TUNE IN EVERYSUNDA~
There'snot a lot you Can
comeloose. It's the same kind
do to squeeze more powerout of breather line running out of
of aYZ. Rightout of the box,
yourYZ's carbs,
You can get the silicone at
its an awesome beast that
needs little pamperingorcoax. your TeamYamahaCenter,
ing to set a course on fire.
part number:ACC·llOl·0S.
