Jetting Method and Adjusting the carburetor

Because still there and even many who do not know about the carburetor jetting, I try to review more complete.
Done by setting the carburetor adjustment on:
1 The size of the pilot jet
2 The size of the main jet
3, the jet needle clip position
4 Setting the air openings
5. Settings stationary
At 3/4 throttle to full the role is skepticism needle and main jet. So that would add top speed, replace the main jet. Just buy a new main jet size larger, continue to replace the old plug. Thread size and shape should be the same, the difference is the size of the hole in the middle. So there is no problem of mutually MJ / PJ screw shape and the same origin.

For the air-screw setting, its function to regulate fuel ratio with the incoming air. The more dry the mixture can be more efficient. However, the consequences of its rapid engine heat. If it is too dry can not even bike path. The optimum settings are indicated by a red brick color plugs. That means the setting is just right dah results would be economical and powerful. If you want quick acceleration, the setting is made rich. The effect is wasteful and how to shift the position of the clip down.

So the first set MJ, PJ and clip position. Standard clip position is the middle. To be economical, the clip can go up to the second position from the top. If the highest, worry too economical. If it is too dry, overheat easily block and piston-ring might get caught speeding when worn.
Furthermore, adjusting the air openings to the gasoline-air mixture optimum result. The sign is the optimum mix of red brick plug color (almost perfect combustion).
The way conventional carburetor tuning air openings:
1 round stationary screw clockwise until a stationary high (± 2500 rpm).
Stationary screw rotate clockwise causing skepticism raised. Just by opening the gas, open the gas causes the greater venturi and the engine rev up. Why should high first? Since the air openings will be closed later discharged, if skepticism is not enough then lifted so the engine dies. So skepticism should be quite lifted first.

clockwise, →, RPM up

Stationary screw. Clockwise rotation causes the higher stationary. Rotation in the opposite direction caused the idling / stationary lower.
2 Turn the screw clockwise air openings to enter the fixed (closed).
During playing, idling / stationary will decrease. When the engine so dead, open the air screw 2 turn, back to the first step and add idling.

clockwise, →, fuel mixture becomes richer
RPM mark down quickly

Rotary screw air openings clockwise until it locks stuck, but do not be tightened.
3 Turn the screw counterclockwise air aperture (opening), slowly.
Observe its stationary sound (sound exhaust / engine), stationary will increase as the air screw slowly opened. Play continues slowly, and stop when stationary does not want to ride anymore. For the average standard conditions - average being 1.5 - 2 rounds. If you want more acceleration and durable machine, create a richer fuel mixture slightly. The way rotary screw air openings as much as ¼ clockwise rotation again.

rotate counter-clockwise until the highest RPM

4, Round stationary screw counterclockwise until the stationary down.
Choose a suitable stationary. Stationary enough / high responsive but cause engine fuel consumption, less stationary / low lead gasoline efficient but less so resposif (less power). It's finished his carburetor jetting.
If you have opened many stationary screw or until they run out but do not want to idle it down, it was a sign of her needle hanging. Usually caused by setting the distance play no gas cable.

Throttle cable can be set to free play distance throttle on the steering wheel. Try to think - think there is a distance of 2-10 mm of free play her. If there is no worry of her free range of engine RPM does not go down even though its stationary screw rotation is fixed to the left. If it happens later his accident-prone.