2011 loncin 125 that will not idel on start up

Automatic choke issue. In hot weather the engine doesn't need the choke. When the engine cools it does. In winter the engine cools much faster. As it is fuel injected and electronically controlled, you will probably need a dealer service. However, there is a quick trick, to trick the computer. In summer grab a big handful of throttle as you start it. This introduces a lot more air and less fuel.

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check for a faulty pinion gear or solenoid on the starter.
it is moving to close the big terminals but not pulling the pinion gear into mesh with the ring gear
could be that the pivot pin has fallen out

Whaty is your issue?

You have replaced it all except the problem part. The stator is a very weak part on most Chinese brands. The signal generator (coil outside the flywheel usually goes first. If you have a "peak reading volt meter this coil should put out 2-5 volts dc at cranking speed. It should also have some resistance reading(guessing in the 130 ohm range) when checked across the two leads with an ohmmeter. A dead one (open circuit) will have no reading at all.

tail light brown stop lights red

The easiest way to tell is to wait until the engine is warm and then put the lever in the opposite position. If the engine struggles, it is in the "choke on" position.

that is the idel screw that you were pionting at.
can you get a better picture of were he popping is coming from?
Sounds to me that you have a head gasket leaking and if the head gasket is leaking the bike wont idel.

The motor is based on the Honda 50/70/90 motor. I'm not certain of the oil capacity but I do know this- The dipstick is not screwed in to check the oil level. Unscrew it, wipe it and dip it into the crankcase (don't screw it in)for the correct oil reading. Honda states oil capacities of between .8 and 1.0 liters.Should be pretty close but don't overfill it.Good luck!

contact a mci loncin dealer they will know or will find what plug is needed.