Tekno EB 410, Building Instructions

Vehicle

(2 cell)

(50-80 ft Straight)

Small Track

(pinion/spur)

Large Track

(pinion/spur)

(80-150 ft Straight)

EB410

Motor

5.5T
6.5T
7.5T
8.5T
10.5T

18/81 tooth
19/81 tooth
20/81 tooth

20/76 or 21/81
21/76 or 22/81

19/81 tooth
20/81 tooth
21/81 tooth

21/76 or 22/81
22/76 or 23/81

13.5T

25/70 tooth

26/70 tooth

TKRBB040725

 – Ball Bearings (4x7x2.5mm, 

sold in pack of 4pcs) Bearings for the

bellcrank/ackerman plate.  8pcs required in kit.

TKRBB05114

 – Ball Bearings (5x11x4, 4pcs)

Diff pinion support bearings for the front/rear

transmission housings.  4pcs required in kit.

TKRBB10154

 – Ball Bearings (10x15x4mm,

sold in pack of 4pcs) Bearings for all three diffs. 

Also inner front steering blocks/rear hub carriers. 

10pcs required in kit.

TKRBB06124

 – Ball Bearings (6x12x4mm, 4pcs)

Bearings for outside of steering blocks and outer

rear hub carriers.  4pcs required in kit.

PART

#

/COLOR

F / R

Rear

Rear

Rear

Front

Front

Front

Front

Rear

Rear

1.2

1.2

7.75

7.38

53mm

53mm

2.82

3.02

Front

TKR6796

TKR6797

TKR6793

TKR6794

TKR6795

TKR6784

TKR6785

TKR6786

TKR6787

TKR6783

WIRE DIA.

1.2

1.2

1.2

1.3

1.3

1.3

1.3

1.3

COILS

9.38

8.75

8.25

9.0

8.5

8.13

7.75

9.5

LENGTH

53mm

53mm

53mm

45mm

45mm

45mm

45mm

45mm

LENGTH

COILS

WIRE DIA.

2.20

2.41

2.60

3.16

3.41

3.62

3.85

2.95

RATE

Changes to wheelbase can affect the overall handling of your vehicle, since it adjusts the distribution 

of weight on the wheels as well as the angle of the driveshafts.   Shortening the  wheelbase at the 

rear will give you more steering into a turn and off power, less steering out of a turn and on power.  

Lengthening the wheelbase at the rear will yield the opposite results.  

Shortening the wheelbase in the front will land jumps a little better and lengthening it will be better 

through small bumps.  In general a longer wheelbase is better on open and/or bumpy tracks  and a 

shorter wheelbase is better on tighter technical tracks.

This chart shows the recommended starting ratios for the 

common motor winds.  Please consult the motor/esc manu-

facturers recommended settings to ensure you start with the 

best final drive ratio (FDR) for your equipment.  When setting 

your mesh you want to be able to 

slightly

 rock the spur gear 

back and forth without moving the pinion gear.  Tekno RC is 

not responsible for damage done to your electronic equipment 

or gears due to improper gearing or mesh.

* For bearing maintenance, please refer to page 28.

Softer springs will increase traction through the turns by allowing 

more roll, slow down the responsiveness of the vehicle, and can 

be better in the bumps.  Stiffer springs will increase corner speed 

if traction is available and will also tend to jump and land better.  

Once you find a set of springs you like you will typically only 

change them for tracks with dramatically different conditions.

Sway bars are used to adjust a 

vehicle's lateral grip by resisting 

chassis roll.  A thicker bar 

decreases roll more than a 

thinner bar will.  More roll means 

more grip and less roll means 

less grip.  The front sway bar 

affects mainly off-power 

steering at corner entry.  The 

rear sway bar affects mainly 

on-power steering and stability 

in mid-corner and at corner exit.

Pistons with smaller holes work well for smoother tracks with large jumps and pistons with larger holes work 

well for rougher tracks with less jumps.  Smaller hole pistons will typically use thinner oil than larger hole 

pistons.  Shock oil is also affected by the ambient temperature so a change in viscosity might be necessary 

with a change of 5°C or ~10°F.

Front Arm

Rear Arm

Wheelbase Adjustments

FORWARD

BACKWARD

FORWARD

BACKWARD

Front: 

Changing front diff oil affects overall steering response.  Thinner can increase off-power steering but 

the vehicle may be twitchy and harder to drive.  Thicker can increase on power steering and stability.  We 

recommend 10k to 20k in the front diff.

Center: 

Changing center diff oil affects the front-to-rear drive balance.  Thicker will reduce off-power 

steering and on-power rear traction but increases on-power steering and acceleration if traction is available.  

Thinner will increase off-power steering and on-power rear traction but reduce on-power steering and 

acceleration.  We recommend 10k to 30k in the center diff.

Rear: 

Thinner rear diff oil increases off-power steering and reduces traction into a corner.  It also reduces 

on-power steering and increases traction out of a corner.  Going too thin will make your vehicle inconsistent, 

however. Thicker rear oil will have opposite effects, and once again, going too thick will make the vehicle 

inconsistent.  We recommend 5k to 10k in the rear diff.

Differentials

Springs

Pistons

Sway Bars

Bearing Chart

Gearing Recommendations

27

Set Up Information

(continued)