Adjusting the Slipper Clutch |
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The model is equipped with an adjustable |
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slipper clutch, which is built into the |
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large spur gear. The purpose of the | Tighten |
slipper clutch is to regulate the |
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amount of power sent to the rear |
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wheels to prevent tire spin. When | Loosen |
it slips, the slipper clutch makes a |
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Motor and Gearing
There are two different types of aftermarket motors that can be purchased for your model, stock and modified. Stock motors all have the same wire thickness and number of turns around the armature as governed by sanctioned racing organizations. They are inexpensive and widely available. Modified motors are more expensive, may feature ball bearings, and come in a variety of wire thicknesses and a number of turns of wire on the armature. The fewer number of turns of wire on the armature, the more powerful the motor will be. Keep in mind that the more powerful the motor, the less battery run time you will have.
One of the more significant advantages to your model’s transmission is the extremely wide range of available gear ratios. It can be geared low enough to run an extremely hot, modified motor. A modified motor should be geared lower (higher numerically) than a stock motor because it will reach its maximum power at higher rpm’s. A modified motor that is geared incorrectly can actually be slower than a
# Spur Gear Teeth | x 2.72 = Final Gear Ratio | |
# Pinion Gear Teeth | ||
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combinations not listed on the gear chart:
If you are worried that you might be
ADJUSTING YOUR MODEL
four minutes before the battery dies, then change to a lower gear ratio. This temperature test assumes that the model is close to factory stock weight and operates freely with no excessive friction, dragging, or binding, and the battery is fully charged and in good condition.
The model is equipped with a Titan 12T 550 motor. The gear combination that comes stock on each model provides good overall acceleration and top speed. If you want more top speed and less acceleration, install the included
The Titan 12T is equipped with an integrated cooling fan that is effective during medium to
motor. Repetitive starting and | • Fast Acceleration | ||
• Short Distances | |||
stopping over short distances | |||
• Small Tracks | |||
creates excess heat and will |
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• Good Acceleration |
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not allow the fan to cool the | |||
• Good Speed | |||
motor properly. For this type | |||
• Normal Conditions | |||
of driving, smaller pinion |
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• High Top Speed |
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gears are recommended to | |||
• Long Distances | |||
reduce load on the motor. | |||
• Hard Surfaces | |||
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Gearing Compatibility Chart
The chart to the right shows
a full range of gear combinations. This does NOT imply that these gear combinations should be used.
Adjusting Gear Mesh |
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Incorrect gear mesh is the most common cause of |
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stripped spur gears. Gear mesh should be checked and |
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adjusted anytime a gear is replaced. To set the gear |
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mesh, cut a narrow strip of notebook paper | Strip of |
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and run it into the gear mesh. Loosen the |
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Paper |
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motor screws and slide the motor and pinion |
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gear into the spur gear. Retighten the motor |
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screws and then remove the strip of paper. |
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You should be able to run a fresh strip of paper |
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through the gears without binding them. |
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| Screws |
Do not run your model with the slipper clutch adjusting spring fully compressed. The minimum recommended slipper clutch setting is 1/2 turn counterclockwise from fully compressed.
Spur Gear
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| 76 | 83 | 86 | 90 |
| 12 | - | - | - | 20.40 |
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| 13 | - | - | - | 18.83 |
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| 14 | - | - | - | 17.49 |
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| 15 | - | - | 15.59 | 16.32 |
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| 16 | - | - | 14.62 | 15.30 |
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| 17 | - | - | 13.76 | 14.40 |
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| 18 | - | 12.54 | 13.00 | 13.60 |
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Gear | 19 | - | 11.88 | 12.31 | 12.88 |
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20 | - | 11.29 | 11.70 | 12.24 | |
Pinion |
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22 | - | 10.26 | 10.63 | 11.13 | |
| 21 | - | 10.75 | 11.14 | 11.66 |
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| 23 | - | 9.82 | 10.17 | 10.64 |
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| 24 | - | 9.41 | 9.75 | 10.20 |
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| 25 | 8.27 | 9.03 | 9.36 | 9.79 |
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| 26 | 7.95 | 8.68 | 9.00 | - |
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| 27 | 7.66 | 8.36 | 8.66 | - |
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| 28 | 7.38 | 8.06 | 8.35 | - |
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| 29 | 7.13 | 7.78 | 8.07 | - |
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| 30 | 6.89 | 7.53 | - | - |
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Stock
Included Optional
Usable Range
High Speed, Hard Surfaces Only
Not Recommended
-Does Not Fit
RAPTOR • 21