How to set the ignition timing of Qiaoge motorcycle? Is that so?

Turn the intake and exhaust camshafts to a horizontal position and fix the crankshaft pulley to the front cover.

Ignition timing means that when the compression stroke of the engine ends and the piston reaches the peak stroke, the ignition system provides high-voltage spark to the spark plug to ignite the compressed mixture in the cylinder to do work. This time is the ignition timing.

If the engine speed can't increase with the throttle opening, the engine is stuffy and the exhaust pipe has a "chug" sound, so it is too late to ignite; If the engine has a violent metal knocking sound, that is, deflagration (cylinder knocking), it is premature.

Extended data:

Ignition timing is a key parameter affecting the in-cylinder combustion process of gasoline engine, which directly determines the highest combustion pressure, pressure rise rate and highest combustion temperature in the cylinder, and affects the dynamic performance and emission of the whole engine. When a gasoline engine is fueled with methanol gasoline, the physical and chemical characteristics of methanol composition are different from those of gasoline, which will also change the temperature, pressure and composition change process in the in-cylinder combustion process, thus affecting the conventional emission generation process of the gasoline engine, and even producing unconventional emissions such as unburned methanol and formaldehyde. ?

The ignition system ignites the engine according to the working sequence of the engine cylinders. The best ignition time can make the engine get maximum power and minimum fuel consumption. In the engine cylinder, it takes a certain time (about a few thousandths of a second) from the start of ignition to complete combustion. In order to make the engine emit maximum power, the ignition time should not be at the end of the compression stroke, but should be advanced appropriately.

Baidu encyclopedia-ignition timing