
FINAL ADJUSTMENTS
RADIO ADJUSTMENTS
Use the follow ing steps to m ake the finalad-
justm ents on your car
1. T u rn the transm itter on.
2. M ake sure the m otor is disconnected.
3. C onnect your battery pack (ifRTR)and/or
turn the E S C s pow er sw itch on (ifincluded).
4. Movethe steering controlon the transm itter
to the rightand left.Do the w heels movein the
correct direction? Ifnot
,you m ust reverse the
steering servo dire c tion on your transm itter
(see radio m anual.)
5.Adjustyour steering trim (see radio m anual)
untilthe #9659 steering rack is centered un-
der the top plate.Then,using the two steering
turnbuckles, adjust the front w heels so they
are pointing straight ahead.
6. A d just
the E S C (electronic speed control)
according to the speed controlm anufacturer’s
instru c tions. Som e m anufacturers have the
motor connected during adjustm entand som e
do not.Now turn the pow ersw itch off.
7. C onnectthe motor.Place yourcaron a block
or car stand so that allfour w heels are el-
evated.Turn the pow er
sw itch on again.C heck
the E S C and steering settings you have m ade
and then turn the pow er sw itch back off.
8. Rememberthis! The transm itter is always
the FIRST TO BE TURNED ON and TH E LA ST
TURNED O FF.
M ake these adjustments before you drive the buggy
MOTORGEARING
To getthe m ostfrom your motor,proper gear-
ing is im portant.The gear ratios listed in the
chartare recom m ended starting gear ratios.
Ratios can vary from track to track, but you
should not change the pinion size m ore than
one tooth from the recom m ended ratio.
FINAL
MOTOR PINION SPUR DRIVE RATIO
24° stock (torque-based) 24 81 8.78:1
24° stock (RPM -based) 22 81 9.57:1
Spec 19 22 81 9.57:1
14 turn m odified m otor 23 81 9.16:1
13 turn m odified m otor 22 81 9.57:1
12 turn m odified m otor 21 81 10.03:1
11 turn m odified m otor 20 81 10.53:1
10 turn m odified m otor 19 81 11.08:1
MAINTENANCE Follow these steps to keep yourbuggy in shape forracing
CHECK FO R FIT
You should periodically check allthe m oving
parts: front and rear end, suspension arm s,
steering blocks, steering linkage, shocks, and
so on. Ifany of these should get dirty or bind
then your car’s perform ance w illsuffer.
MOTORMAINTENANCE
Betw een runs, inspect the brushes to ensure
they are moving freely in the brush holder.This
is done by carefully rem oving t
he spring and
sliding the brush in and out of the holder.If
there is any resistance or rough spots, rem ove
the brush and carefully w ipe the brush clean.
This w illclean offany buildup so the brush
slides sm oothly in the brush holder.
Afterevery 3 to 5 runs,rem ove the brushes
from the holders and inspectthe tips for w ear
and/
or burning.Ifthere is a noticeable am ount
of w ear,replace the brush w ith a new pair.If
the tip is a burnt blue color,then the lubricant
in the brush has been burned aw ay and new
brushes should be installed.
Afterevery otherbattery charge you should
carefully clean the m otor.O ne recom m ended
method is to spray m otor cleaner directly on
the brush and com m utator
area. R un the m o-
tor for approximately 15 seconds. Disconnect
the m otor and spray itagain, making sure the
runoffis clear and clean. Ifthe runoffis still
dirty, repeatthe spraying action untilclean.Af-
ter com pleting the cleaning, apply a sm all
am ount of lightweight oilto each bushing or
bearing for lubrication. Be carefulnot
to apply
too m uch oil,for this w illpick up dirtand con-
tam inate the com m utator and brushes.
20
ASSEM BLE BATTERY PACK
Ifyou are notusing a stick battery pack,here is
how to assem ble yourbattery pack.Solder in-
dividualcellconnections as show n.
Team racers prefer battery bars for stur-
dier connections. Insulated w ire w illnot allow
the pack to fitin the battery slot
.Solder connections w ith R eedy B attery
Bars (#651)
DIFFERENTIAL
Adjust the differential(“diff”) as noted on page
6. Adjusting the diffis notm eantto be a tuning
option. Ifyou can hearthe diffmaking a “bark-
ing” or “chirping” sound on jum p landings, ei-
ther your diff is set too loose or your slipper
clutch i
s set too tight.F irst check your slipper
setting,then re-set the diffaccording to the in-
structions on step C -9.
SLIPPER CLUTCH
The assem bly instructions give you a base
setting for your clutch. Turn the nuton the
shaftso thatthe end ofthe top shaftis even
with the outside ofthe nut.Tighten the nut4
more turns. Atthe track, tighten or loosen the
nutin 1/8 turn increm ents until
you hear a
faint slipping sound for 1-2 feet on takeoffs.
Another popular way to setthe clutch is
to hold both rear tires firmly in place and
apply shortbursts of throttle.Ifthe clutch is
properly set,the front tires should liftslightly
up offthe surface.
Aim negative lead tow ard the front
CAUTION!Increasing the
pinion size by m ore than one
tooth can dam age your m otor
from excess heat.