The quality of the engine is the key to determining the quality of motorcycle net wheels. When selecting, first observe whether the engine and the frame are on the same centerline, and then step on the starter lever in neutral. If no sound is heard, it means that the engine cylinder is OK. Turn on the power supply, turn on the fuel tank switch, and start on-site to check the engine start and gear shift conditions. A good engine can be started by stepping on the starter shift lever 2-3 times, and does not turn off under idling conditions, there is no noise, and the acceleration is very sensitive .
Afterwards, the gear-in check was carried out, and the gears were gradually shifted from low-speed gears to high-speed gears. The gear-engagement was smooth, and there was no collision sound of gears in each gear when shifting, and the exhaust pipe nut did not leak, even if the quality was good. Finally, observe the color of the smoke from the muffler, light cyan is the best.
