Tekno RC ET48.3 Building Instructions
Introduction
Disclaimer: Tekno RC is not responsible or liable for any property or personal damage, loss, or
injury incurred as a result of using this product. This kit is meant for use by persons 14 years of
age or older and in the strict connes of a legally permitted RC track or facility.
Warnings: Always double-check that your radio gear is working properly before operating vehicle.
Never operate the vehicle indoors (unless the RC track is an indoor facility). Use caution while
operating vehicle so as not to collide with people who may be turn marshalling or who might
otherwise not be aware that a fast moving RC vehicle is in the vicinity.
Warranty: We warrant that the parts included in this kit are free from defects. If you nd a
defective part in your kit, please contact us @ info@teknorc.com and we will help you to resolve
the issue. We do not warranty parts that may be broken during operation of the vehicle or
otherwise. Refer to the end of this instruction manual for a listing of spare/replacement and
option parts. All spare parts and other info are available on our website (www.teknorc.com)
and through our network of domestic and international dealers and distributors.
Additional equipment and parts needed:
2/3 channel radio transmitter and receiver
1/8th scale ESC and motor
High torque steering servo (300 oz/in torque minimum)
4-6s LiPo battery
1/8th scale truggy tires, wheels & CA glue
Paint for Body
MOD1 Pinion (TKR4171->TKR4190)
Tools needed:
Hex drivers 1.5mm (TKR1104), 2.0mm (TKR1105), 2.5mm (TKR1106)
Nut drivers 5.0mm (TKR1107, 5.5mm (TKR1108), 7.0mm (TKR1109)
17mm Wheel Wrench (TKR1116)
Pivot Ball and Shock Multi-tool (TKR1115, for shock assembly)
4mm and 5mm turnbuckle wrench (TKR1103)
Hobby knife
Needle-nose pliers
4mm arm reamer
Lexan Body Scissors
Thank you for purchasing the Tekno RC ET48.3 1/8th Scale Electric Competition Truggy Kit. The ET48.3
represents a continued evolution in the 1/8th scale electric class. Since the original ET48 was released
in 2014, we have continued to focus on rening and improving the vehicle to provide superior
performance and value to our customers. We are always working on new projects, so please
check our website (www.teknorc.com) regularly for the latest news, parts, and kits. Thanks again.
Apply grease to the groove
where the o-ring is placed
as well as the o-ring itself
Apply grease to
the groove
where the o-ring
is placed
as well as the
o-ring itself
Apply grease to the groove in the outdrive
Apply grease to the
groove in the outdrive
Fill with 10,000 wt oil to
1mm below full
DO NOT OVER FILL
TKR5145B
TKR5144
Bag A
Center Differential
(overview)
TKR5237K
TKR5149
TKR5150
TKR5150
TKR5143
TKR5113
*TKR5237
*TKR5115
(Option)
TKR1325
M3x14mm Flat Head Screw
x4
TKR5144
TKR5145B
TKRBB08165
Ball Bearing(8x16x5mm)
x2
TKR5144
Differential 0-rings
x2
TKR5145B
Differential Shims (6x17mm)
x2
TKR1325 x4
TKR5149
TKRBB08165
Diff
Oil
Apply grease to the groov
e
where the o-ring is place
d
a
s well as the o-ring itself
Apply gre
a
a
se to
t
he groov
e
where the o-ring
is plac
e
s well as the
-ring itsel
f
pply grease to the groove in the outdrive
grease to the App
in the outdrivegro
ove
Fill with 10,000 wt oil to
1mm below ful
l
DO NOT OVER FIL
L
TKR5145B
KR51
44
R51
44
R5145
B
R1325 x
4
TKR51
49
TKRBB0816
5
TKR5112X
TKR5112X
TKR5150
TKR5144
3
Grease
Grease
Grease
Grease
Step
A-2
Step
A-1
Step
A-4
Step
A-3
*TKR5149A
(Option)
*
TKR5149A
(Option)
Apply grease to the groove
where the o-ring is placed
as well as the o-ring itself
Repeat for rear di
Fill FRONT with 10,000 wt oil
Fill REAR with 5,000 wt oil
to 1mm below full
DO NOT OVER FILL
Repeat for rear di
Repeat for rear di
Repeat for rear di
*TKR5149A
(Option)
Apply grease to the groove in the outdrive
TKR5145B
TKR5144
TKRBB08165
Grease
Grease
TKR5149
TKR5150
*
TKR5149A
(Option)
Diff
Oil
Apply grease to
the groove
where the o-ring
is placed
as well as the
o-ring itself
Apply grease to the
groove in the outdrive
Bag B
Front and Rear Differential
(overview)
TKR5403
TKR5149
TKR5150
TKR5150
TKR5143
TKR5113
TKR1325
M3x14mm Flat Head Screw
x8
TKR5144
TKR5145B
TKRBB08165
Ball Bearing(8x16x5mm)
x4
TKR5144
Differential 0-rings
x4
TKR5145B
Differential Shims (6x17mm)
x4
TKR1325 x4
Apply grease to the groov
e
where the o-ring is place
d
s well as the o-ring itsel
f
Repeat for rear di
ill FRONT with 10,000 wt oi
l
ill REAR with 5,000 wt oi
l
o 1mm below full
DO NOT OVER FILL
Repeat for rear d
i
Repeat for rear di
Repeat for rear di
Apply grease to the groove in the outdriv
e
TKR5145B
TKR514
4
TKRBB08165
rease
Grease
TKR51
49
TKR5150
KR51
49A
Option
)
Apply grease to
e groove
where the o-ring
is place
d
s well as th
e
-ring itsel
f
rease to the
pply
g
n the outdriv
e
roove
i
KR51
44
TKR5145B
KR1325 x
4
TKR5114X
TKR5114X
TKR5144
4
Grease
Grease
Step
B-2
Step
B-1
Step
B-4
Step
B-3
TKR1525
TKR5012
TKR5012
TKR5428
TKR5075
TKR5405
Front
Rear
TKR1603
TKRBB05114
TKRBB05114
TKR5405
TKR1222
TKR1222
TKR1525
TKR1222
TKRBB05114
TKR1222
TKR5401
TKR1525 x6
TKR1226
TKR1226
TKRBB05114
TKR1529
TKR1525
M3x14mm Cap Head Screw
x6
TKRBB05114
Ball Bearing (5x11x4)
x2
x2
TKR1222
13x16x0.1mm Diff shim
TKR1529
TKR1603
Grease
Note: at spot
Note: at spot
TKR1603
M5x4mm Set Screw
x1
TKR1529
M3x20mm Cap Head Screw
x2
TKR15
2
Rear
TKRBB0511
4
4
5
KR54
0
KR122
152
5
TK
TKR122
6
152
9TKR
reas
p
: at spo
tote
p
at
otNote:
Bag C
Front Gearbox
(overview)
Step
C-1
Step
C-2
Step
C-3
5
Thread
Lock
TKR1226
5x7x0.2mm shim
x1
Note: TKR1222 - The gear mesh should be as close as possible without any binding. Test the tment of the di
with both TKR1222 shims on the gear-side of the di. If the di turns freely without binding, continue to next
step. If the di binds and does not turn freely (it will make a grinding or crunching sound when spun), remove
one TKR1222 shim from the gear side and install it onto the other side of the di. Reassemble and test the mesh
again. If it is still binding, remove the second TKR1222 shim from the gear side and install it onto the other side
of the di. When you are satised that you have the best gear mesh possible continue to the next step.
Note: The front and rear of
the car use dierent inner
bulkheads.
The front is angled
whereas the rear is oset
and only slightly angled.
TKR5075
TKR5016B
TKR5401
TKR5429
TKR1222
TKR1222
TKR1525
TKR1529
TKR1222
TKR5016B
TKR1525
M3x14mm Cap Head Screw
x4
TKRBB05134
Ball Bearing (5x13x4)
x2
TKR1529
M3x20mm Cap Head Screw
x2
TKR1222
13x16x0.1mm Diff Shim
x2
TKRBB05134
TKRBB05134
TKR5405
TKRBB05134
TKR1603
TKR1603
TKR1525TKR1525
Grease
Front
Note: at spot
Rear
Note: at spot
TKR1525 x2
TKR1525
TKR1222
TKR1226
TKRBB05134
TKR1603
M5x4mm Set Screw
x1
TKR1226
5x7x0.2mm shim
x1
TKR1529
TKR1222
R122
2
52
5
TKR
1
KR1529
TKRBB0513
4
34
KRBB051
40
5
TKR
5
KR1603
KR152
5
rease
Fro
n
p
at spo
t
ote:
p
: at spotNo
te
Bag D
Rear Gearbox
(overview)
6
Step
D-1
Note: TKR1222 - The gear mesh should be as close as possible without any binding. Test the tment of the di
with both TKR1222 shims on the gear-side of the di. If the di turns freely without binding, continue to next
step. If the di binds and does not turn freely (it will make a grinding or crunching sound when spun), remove
one TKR1222 shim from the gear side and install it onto the other side of the di. Reassemble and test the mesh
again. If it is still binding, remove the second TKR1222 shim from the gear side and install it onto the other side
of the di. When you are satised that you have the best gear mesh possible continue to the next step.
Step
D-2
Step
D-3
Thread
Lock
Note: The front and rear of
the car use dierent inner
bulkheads.
The front is angled
whereas the rear is oset
and only slightly angled.
TKR5405
TKR1226
TKR1529
TKR1201
TKR1221
TKR1221
TKR1201
TKR1529
TKR1529
M3x20mm Cap Head Screw
x4
TKR1524
M3x12mm Cap Head Screw
x6
TKR1201
M3 Lock Nut Black
x2
TKR1221
M3x8mm Washer
x2
Step
E-1
Step
E-2
TKR1524
TKR1524
TKR5181
TKR152
9
KR1221
KR122
1
TKR152
9
-
1
-
2
TKR152
4
TKR518
1
Bag E
Low Profile Wing Mount
7
SETTINGS
12
34
12
34
POSITION SETTINGS
1 - REARWARD LOW 2 - FORWARD LOW
3 - REARWARD HIGH 4 - FORWARD HIGH
DOWNFORCE SETTINGS
(downforce angles)
Note: Stock position setting is
# 3, Rearward High
Note: Stock downforce setting is 4
°
4
°
7
°
10
°
Stock Position
(”D” Block)
Stock Position
(”C” Block)
30.2
TKR1601
TKR1601
TKR1601
TKR5086
TKR5493 - 2.6mm
TKR5086
Install the sway bar ball onto the
sway bar wire until the end of
the wire is ush with the ball as
picture above.
Note: Loosen the M3x4 set screw (TKR1601)
if
the anti-roll bar does not
turn freely.
Note: Do not over-tighten
TKR5049A
TKR5163
TKR5164
TKR5165
TKR5430
TKR1601
TKR5079A
TKR1522
TKR1522
M3x8mm Cap Head Screw
x2
Bag F
Rear End
*TKR5490 - 2.3mm
*TKR5491 - 2.4mm
*TKR5492 - 2.5mm
*TKR5494 - 2.8mm
*TKR5495 - 3.0mm
(Option)
TKR160
1
TKR508
6
TKR5493 - 2.6mm
TKR508
6
tall the sway bar ball onto the
ay bar wire until the end of
e wire is ush with the ball as
h
picture above
.
the M3x4 set screw (TKR1601
)
ote: Loose
n
-roll bar does notthe anti
urn freely.
ote: Do not over-tighten
TKR5049
A
TKR51
63
TKR516
5
KR5430
KR160
KR5079
A
TKR1522
Rear End
*TKR5490 - 2.3mm
*TKR5491 - 2.4mm
*TKR5492 - 2.5mm
*TKR5
494
- 2.8mm
*TKR5495 - 3.0mm
Option
)
Thread
Lock
Thread
Lock
8
TKR1327
TKR1333
M3x40mm Flat Head Screw
x2
TKR1238
M4x10mm Droop Screw
x2
TKR5049A
Pivot Ball Sway Bar
x2
TKR5079A
Stabilizer Ball
x2
TKR1529
M3x20mm Cap Head Screw
x2
TKR1327
M3x16mm Flat Head Screw
x2
TKR1333TKR1333
TKR1238
TKR1529
tock Positi
”D” Block
)
tock Position
Bloc
k)
TKR1601
M3x4mm Set Screw
x6
Step
F-1
Step
F-2
Step
F-3
TKR5020
TKR5165
TKR5065
Note: With these stock
center dot settings,
Anti-Squat = 2° / Rear Toe = 3°
Use a #19 drill bit or
4mm reamer to ream
arms until hinge pin
falls through freely.
TKR5472
TKR5073
TKR5070
TKR5073
TKR5034
TKR1601
TKR1201
TKR1201
TKR5165
Grease
Step
G-1
Step
G-2
Changes to the wheelbase have a dramatic eect on handling,
since it shifts the disribution of weight over the rear wheels.
This adjusts traction. By shortening the wheelbase at the rear, you
are placing more weight over the rear wheels.
Changes to the wheelbase also change the amount of sweep the
rear driveshaft will have. More driveshaft sweep creates an eect
similar to anti-squat, where the rear end gets pushed upwards on
throttle. This helps reduce chassis slap when landing jumps on throttle.
(FRONT)
(REAR)
Bag G
Rear Hub/CVA Assembly
TKR5472
TKR507
KR503
4
KR120
1
TKR120
1
KR51
65
rease
te
p
-
te
p
-
Rear Hub/CVA Assembl
y
9
Thread
Lock
Note: Notch on pin
needs to line up
with set screw.
TKR5199
TKRBB13194
TKRBB08165
TKR5071
(Option)
*TKR5071B
*TKR5071C
*TKR5071X
(Option)
*TKR5199A
TKR1603
TKR5073
CV Joint Pin
x2
TKR1201
M3 Locknut Black
x4
TKR1603
M5x4mm Set Screw
x2
TKRBB13194
Ball Bearing (13x19x4)
x2
TKRBB08165
Ball Bearing (8x16x5)
x2
TKR5071
M3x16.8mm Pin
x2
TKR1601
M3x4mm Set Screw
x4
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