How many throttles are installed in the cylinder?

Throttle is divided into intake throttle and exhaust throttle. As the name implies, the intake is a throttle and the exhaust is a throttle.

The thread specification of the throttle valve is selected according to the cylinder, and the nozzle diameter of the speed regulating valve is selected according to the corresponding cylinder diameter. Generally, the openings of brand manuals have recommended diameters, so you can choose for reference. Avoid choosing too small a diameter of the air pipe, so that the cylinder cannot move or crawl.