This is the appropiate procedure to change a main jet without spilling fuel and refilling of the float chamber for an immediately re-start of the engine.
The following procedure can be applied for:
★ 125 Micro MAX
★ 125 Mini MAX
★ 125 Junior MAX
★ 125 MAX
★ 125 MAX DD2
Loosen the 2 crews of the intake flange and carburettor socket.
Connect a syringe (60 ml) with the left hole of the venting tube.
Turn the carburettor towards the seat in horizontal position.
In case a big seat is mounted, it might be necessary to remove the carburettor cap with the carburettor slide to be able to turn the carburettor in horizontal position.
Pull on the syringe and suck the fuel of the float chamber into the syringe.
Remove the carburettor plug screw, change the main jet and fit the carburettor plug screw again.
Turn the carburettor in upright position and tighten the two crews of the intake flange and carburettor socket.
If the carburettor cap and carburettor slide have been removed, they have to be mounted again.
Re-fill the float chamber by pressing the fuel in the syringe into the float chamber.
Ignition ON/OFF switch in position ON and press the start button – the engine will start immediately as the float chamber is already filled with fuel.