Motor Fine Tuning - Reely ROAD Ice Land ARR Bedienungsanleitung

6 S
ET
B
EARING
Overheating the engine and/or the clutch also has an effect on the bearings of the clutch bell.
Leaking and toughening of the bearing grease (running dry of bearing) as well as different expansion of the balls and
the ball bearing case in the case of excessive heat, can lead to a jamming of the balls. If the balls can no longer move
freely, there are frictional losses and therewith an additional heating up of the engine shaft.
6.1
E
NGINE FINE TUNING
After the run-in phase of the engine, you can start the fine tuning to increase the performance.
To that effect, optimize the mix preparation for idle speed and change-over at the idle speed mix adjusting screw and
with full throttle at the main nozzle needle.
This fine tuning is significantly simplified thanks to the carburettor of a new type with the material combination aluminum/
plastic. Carburettors made of metal only heat up a lot during operation which causes fuel parts to evaporate already in
the carburettor.
Thus, the carburettor setting selected with a cold engine does not remain constant during operation.
The small heat absorption of the synthetic material prevents this effect.
A
DJUST THE MAIN NOZZLE NEEDLE
- Start the engine and remove the plug connector. Let the engine warm up for approximately 1 min.
- Drive the model as usual. If it seems that the engine runs too rich, make the mix leaner by screwing in the main
nozzle needle by 1/16 rotations respectively, until the desired setting is reached.
- Make sure that the mix is not too lean.
A light white trail of smoke should always be visible coming out of the exhaust pipe.
For an even increased performance, you can change to a fuel with up to 30% nitromethane
.However, there is the danger that the engine would show no satisfactory road performance any more, if you
go back to a fuel with a lower percentage of nitromethane.
If you want to use a fuel with a high percentage of nitromethan continuously, we recommend however,
that you replace the present cylinder head washer with a 0.1 mm (thicker) washer, in order to reduce com-
pression.
If you do not reduce the compression, an overheating of the engine and a defective run can be the consequences!
A
DJUSTING THE IDLE SPEED MIX ADJUSTING SCREW
- Start the engine and adjust the main nozzle needle, as described above.
- Reduce the speed until the centrifugal clutch does not engage any more and that the wheels do not turn any more
when you lift the model off the ground.
- Let the engine cool down in idle speed for approximately 10 – 15 seconds.
- While you are holding the model with your hand, drive at full throttle once briefly and strongly.
Make sure not to touch moving parts!
- If the engine stalls as soon as you run at full throttle, then the idle speed mix is too lean.
- Enrich the mix by unscrewing the screw by 1/16 rotations while the engine is switched off.
- Restart the engine and repeat the procedure until the speed transition from idle speed to full throttle is effected
softly and spontaneously. A small delay in response is normal.
- If the engine smokes strongly during transition from idle speed to full throttle and sounds very rough,
then the mix is too rich.
- Make the mix leaner by screwing in the screw by 1/16 rotations while the engine is switched off.
- Restart the engine and repeat the procedure until the speed transition from idle speed to full throttle is effected
softly and spontaneously. A small delay in response is normal.
- Drive the engine as usual in order to get a feeling of how the engine reacts to load changes.
- Modify the setting until the performance characteristics correspond to your expectations.
© REELY 06/07
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FULL THROTTLE MIX
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