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8

If richening the fuel mixture to bring the temperature down to  
270° F results in poor, sluggish performance (engine never cleans 
out) then return the engine back to a satisfactory state of tune based 
on how it sounds and performs (always with a visible stream of blue 
smoke coming from the exhaust). If engine temperature is exceeding 
270° F with proper cooling and no signs of abnormal running, then 
avoid running the engine at its maximum lean setting. Watch closely 
for any signs of overheating. Richen the fuel mixture slightly to 
provide a safety margin of additional cooling lubrication. 

 

 

 

Symptoms of overheating include:

 

Steam or smoke coming from the engine (not exhaust).

 

Hesitation or stalling during acceleration.

 

Popping or clattering sound when decelerating detonation).

 

Fluctuating idle speed.

ADJUSTMENTS

Toe-in

Geometry and alignment specs play an important role in your 
truck’s handling, so take the time to set them correctly. Set the 
steering trim on your transmitter to neutral. Now, adjust your 
tie rods so that both wheels are pointing straight ahead and 
are parallel to each other (0 degrees toe-in). This will ensure the 
same amount of steering in both directions. If you run out of 
adjustment, then the steering servo will have to be re-centered 
(see “centering your servos” on page 9). 

For increased stability 

add 1-2 degrees of toe-in to each front wheel. Use the 
turnbuckles to adjust the alignment.

Camber

The camber angle of both the front and rear wheels can be 
adjusted with the camber rods (upper turnbuckles). Use a square 
or right-angle triangle to set the camber accurately. Adjust the 
front wheels to 0 degrees of camber (wheel perpendicular to 
the ground). In the rear, adjust the wheels to 1 to 2 degrees of 
negative camber. These adjustments should be set with the truck 
positioned at its normal ride height. 

 

Shocks

The four shocks on Nitro Stampede 
have the most influence on its handling.  
Whenever you rebuild your shocks, or 
make any changes to the pistons, springs 
or oil, always do it carefully and in pairs 
(front or rear). Piston head selection 
depends on the range of oil viscosities 
that you have available. For example, 
using a two-hole piston with a lightweight 
oil will, at one point, give you the same 
dampening as a three-hole piston with 
heavier oil. We recommend using the two-
hole pistons with a range of oil viscosities 

from 10W to 50W (available from your hobby shop). The thinner 
viscosity oils (30W or less) flow more smoothly and are more 
consistent, while thicker oils provide more dampening. 

Use only 

100% pure silicone shock oil to prolong seal life.

The ride height for Nitro Stampede can be adjusted by adding or 
removing the clip-on spring pre-load spacers. Instead of adding 
spacers to increase stiffness, use stiffer springs. Adjust the ride 
height so that the suspension arms are slightly above being parallel 
to the ground. Observe how the Nitro Stampede handles in turns. 
If it is picking up the inside rear wheel in hard turns, then stiffen 
the front suspension. If it is picking up the inside front wheel in 
hard turns, then stiffen the rear suspension. Proper set-up will 
add stability and help prevent roll-overs.

Gear Ratios

A unique Nitro Stampede feature is the ability to change the gear 
ratios. The final drive ratio of the gearbox is 3.75 to 1. Use the 
following formula to calculate the overall ratio:

Nitro Stampede comes with a 66-tooth spur gear and a 18-tooth 
pinion (clutch bell) gear. This combination will provide the best 
overall acceleration and top speed. If you want more acceleration 
and less top speed, then use a smaller clutch bell gear (fewer 
teeth). For more top speed, use a larger clutch bell gear.

adjusting the Slipper Clutch

The Nitro Stampede features an adjustable slipper clutch on the 

spur gear to protect the drivetrain from sudden shock loads (such as 
landing off of jumps with the engine at full throttle). Under normal 
conditions the slipper clutch should not slip. Before adjusting the 
slipper clutch, turn the model off. Do not adjust the slipper clutch 
while the engine is running.

Use the supplied wrench to tighten the slipper nut (clockwise) until  

it stops and then back the nut out 1/4 of a turn. If you notice any 

Positive camber  

 

  Negative camber

Toe-in

PRE-lOaD
SPaCERS

Remove the rubber exhaust pipe  
and the tuned pipe. Remove the 
electric starter drive. Loosen the four 
3x8mm cap-head screws which hold 
the slotted adjusting plates to the 
engine mount. 

Remove the 4mm nylon locknut and 
the spring from the slipper clutch. Try 
to remove the slipper clutch as one 
assembly by holding the pressure 
plates together with your thumb and 
index finger.

Remove the large E-clip on the clutch 
shaft and the clutch bell gear. Remove 
the ball bearings and install them in 
the new clutch bell gear. Reinstall 
the clutch bell gear and E-clip. Note: 
Smaller clutch bell gears use smaller 
ball bearings. Refer to your parts list 
for the correct bearings. Reinstall the 
spur gear on the top shaft and secure 
it with the 4mm locknut. 

Slide a strip of thin note paper 
between the spur gear and the clutch 
bell gear. Push the clutch bell gear 
against the spur gear and tighten 
the 3x8mm adjusting plate screws. 
Remove the paper and the gear mesh 
should be correctly adjusted.

Changing the Clutch Bell and Spur Gears 

Number of 

Spur

 gear teeth

Number of 

Clutch Bell

 gear teeth

x 3.75 

Final drive ratio

Содержание Nitro Stampede

Страница 1: ...OPERATING INSTRUCTIONS COVERS MODEL 4109 KC0532 R01 Part 4199X Rev 090731...

Страница 2: ...liable for any loss or damages whether direct indirect special incidental or consequential arising from the use misuse or abuse of this product and any chemical or accessory required to operate this...

Страница 3: ...iation for nickel cadmium The original rechargeable hobby pack NiCad batteries have very high current handling high capacity and can last up to 1000 charging cycles Good charging procedures are requir...

Страница 4: ...erent channels numbered 1 through 6 Each of the six channels is represented by a color Look at the crystal in the back of the transmitter to determine on which of the channels your truck is operating...

Страница 5: ...fit on initial startup is desirable for those who want the best performing engine Make sure you are using a good quality battery pack that is fully charged new batteries usually require several charg...

Страница 6: ...d with the engine break in 8 Do not rev your engine with no load wheels off the ground BREAKING IN THE ENGINE VERY IMPORTANT Once your engine is running it must be broken in The key to breaking in you...

Страница 7: ...temperature 1 Turn the throttle trim on the transmitter so that the brakes are applied This ensures that the throttle barrel is resting against the idle adjustment screw 2 If necessary remove the air...

Страница 8: ...life The ride height for Nitro Stampede can be adjusted by adding or removing the clip on spring pre load spacers Instead of adding spacers to increase stiffness use stiffer springs Adjust the ride he...

Страница 9: ...e requires timely maintenance in order to stay in top running condition Neglecting the maintenance could allow dirt deposits and moisture to build up inside the engine leading to internal engine failu...

Страница 10: ...uire periodic maintenance and are intended to be used in high performance applications over an extremely wide range of running conditions and situations no warranties are expressed or implied that cov...

Страница 11: ...ixture is too lean Richen the high speed mixture page 7 24 Idle speed set too low Increase idle speed page 7 25 Fuel flow blocked Check that all fuel lines are clear with no pin hole leaks Check for d...

Страница 12: ...he engine from the chassis Turn the engine so that the throttle linkage to the carburetor will come out STEP 9 Changing the piston and sleeve assembly Use a 5 16 inch nut driver to remove the glow plu...

Страница 13: ...n also Rinse thoroughly with denatured alcohol and lube with after run oil STEP 13 Pull the sleeve straight up and out of the crankcase If the sleeve will not move rotate the crankshaft until the slee...

Страница 14: ...see step 14 STEP 25 To assemble the connecting rod and piston place a drop of castor oil in the top end of the connecting rod Insert the wrist pin through the piston and the top of the connecting rod...

Страница 15: ......

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