1. Start after preheating to save fuel. The normal preheating time is not less than 10~20 minutes in winter, and usually not less than 3~5 minutes in other seasons. When the engine is cold started, the lubricating oil film has not been formed in the cylinder, and there is direct contact between the friction pair metals. Forced starting without preheating not only makes the cylinder, piston, valve and other parts in a dry friction state, but also uses 60% of its power for the motion resistance of the cooler, which greatly increases the fuel.

2. The correct way to start: start from the first gear, and then shift to the second gear when the engine crankshaft speed is above 3000 rpm. When the vehicle speed reaches above 30km/h and the engine speed is 3000r/min, shift into the third gear, accelerate to the fourth gear, and drive at an economical speed of about 50 km/h. When the engine speed reaches 6000r/min, shift into the fifth gear.

3. Skillful use of gear can save fuel. When climbing a long slope or poor road conditions, it is necessary to properly select gears and shift gears in time. It is best to use a low gear with a small throttle opening. And the fewer stages, the more fuel-efficient.

Driving at an economical speed is the most fuel-efficient. The fuel consumption curve of the engine at different speeds is fishhook-shaped. The fuel consumption of the low-speed and high-speed sections of the fishhook curve is higher, and the middle-speed section is the bottom fuel consumption area. At this time, the vehicle speed becomes the economical vehicle speed.

5. refuel evenly, don't "violently" refuel. It will take some time to reach a stable speed after slamming on the accelerator. During this period, the fuel consumption will increase greatly, which is more than twice the steady speed. Every time you step on the accelerator, you will consume 5~ 10mL more fuel and 20~30mL more fuel. In addition, after the vehicle is started, if the vehicle is lifted to 60km/h by slow acceleration, it will save fuel by 8~ 10mL compared with rapid acceleration.

Extended data:

Maintenance of scooter;

1. Scooters save fuel mainly by developing good driving habits. If you don't accelerate too fast, don't drive too fast or too slow, you'd better accelerate the car first, then make full use of the inertia of the car and drive at a medium speed with a small throttle.

2. Don't blow empty oil, keep the tire pressure reasonable, check that the brakes are not too tight, and clean the air filter in time. Generally, the air filter should be checked at the same time every time the oil is changed. If it is too dirty, it must be replaced in time.

3. The cleaning frequency of air filter is every 2000km/ time, because the air filter position of scooter is lower than that of straddle-type vehicle, and the air intake direction is generally horizontal (generally upward when riding a bicycle), so the air filter is dirtier than riding a bicycle during driving.

I have seen the spark plugs changed every 20,000 kilometers: CR6E, CR7E, CR8E, CR9E. The number in the middle represents the calorific value. If you have an engine with high compression ratio, I suggest you use a spark plug with high heat value. This can improve power and save fuel.

Reference: Baidu Encyclopedia: Motorcycle Engine