What are the troubleshooting methods for difficult hot-starting of motorcycles?

What does the engine oil grade 5w-40 mean?

The engine oil grade 5w-40 means that W stands for WINTER, indicating it is suitable for winter use. The number 5 before W represents the viscosity at low temperatures. The smaller the number, the better the fluidity at low temperatures and the stronger the cold resistance. The number 40 refers to the viscosity at 100°C. The larger the number, the higher the viscosity and the stronger the high-temperature resistance. The specific introduction of engine oil grades for cars is as follows: 1. Winter oil grades: The winter oil grades are: 0W, 5W, 10W, 15W, 20W, 25W. The symbol W stands for WINTER, and the smaller the number before W, the lower the low-temperature viscosity, the better the low-temperature fluidity, and the lower the applicable minimum temperature. 2. All-season oil grades: The all-season oil grades are: 5W-20, 5W-30, 5W-40, 5W-50, 10W-20, 10W-30, 10W-40, 10W-50, 15W-20, 15W-30, 15W-40, 15W-50, 20W-20, 20W-30, 20W-40, 20W-50. The smaller the number representing the winter part, and the larger the number representing the summer part, the higher the viscosity and the wider the applicable temperature range.

111

Share

What to Do When the Car Makes a Squeaking Noise When the Air Conditioner is Turned On?

Solutions for the squeaking noise when the car's air conditioner is turned on are as follows: 1. Adjust the compressor's position bolt: The air conditioner pulley and belt may slip, producing a sharp friction noise during the process. Check if there is oil on the belt causing the slip, and clean it if necessary. If not, adjust the compressor's position bolt to tighten the belt, increasing friction. 2. Adjust the belt tension: If the noise is due to a loose belt, press the belt to check its tension. If it's too loose, tighten it. If the belt is worn out, replace it. 3. Replace the tensioner pulley: A damaged belt tensioner pulley can also cause noise, so it should be replaced. 4. Clean the blower and ventilation ducts: Foreign objects in the blower or ventilation ducts can also produce noise, so they should be cleaned.

112

Share

What is the Difference Between an Engine and a Transmission?

Transmissions and engines mainly have the following differences: 1. The transmission changes the gear ratio to expand the torque and speed of the drive wheels. 2. The engine is the power source of a car. Most car engines are thermal power devices, referred to as heat engines. Below are related introductions to transmissions and engines: 1. The transmission mainly refers to the car's gearbox, which is divided into manual and automatic types. Manual transmissions primarily consist of gears and shafts, achieving speed and torque changes through different gear combinations. 2. The car engine is the device that provides power to the car, serving as the heart of the vehicle. It determines the car's power, fuel efficiency, stability, and environmental friendliness.

112

Share

Which gear is M1?

M1 refers to the first gear in manual mode. It is commonly used when going up or down slopes, entering underground parking garages, in heavy traffic, or when following other vehicles. When shifted into M mode, the transmission switches to manual operation, requiring the driver to manually change gears. The gear shift lever will have symbols indicating plus and minus; pushing the lever toward the plus symbol shifts up one gear, while pushing it toward the minus symbol shifts down one gear. Common automatic transmission gear positions include P, N, R, D, L, S, and M, which stand for: P (Park), N (Neutral), R (Reverse), D (Drive), L (Low, also known as Hill Climb), S (Sport, also known as Sport Mode).

106

Share

How to Spray Windshield Washer Fluid in a Bora Car?

The method to spray windshield washer fluid in a Bora car is to pull the lever on the right side of the steering wheel upwards. It is important to note that in winter, the selection of windshield washer fluid should be based on its antifreeze performance. Choose a fluid with a freezing point at least 10 degrees Celsius below the local temperature to prevent the fluid from freezing and causing issues such as a malfunctioning washer pump. The Bora is equipped with two types of engines: a 1.5-liter naturally aspirated engine and a 1.4-liter turbocharged engine. It features a MacPherson independent front suspension and a torsion beam rear suspension. The car's dimensions are 4562 mm in length, 1793 mm in width, and 1468 mm in height, with a wheelbase of 2614 mm.

120

Share

How to Turn Off the Auto Start-Stop Function in the New BMW 5 Series?

The method to turn off the auto start-stop function in the new BMW 5 Series is to simply press the auto start-stop button. The auto start-stop button is located in front of the gear lever, marked with a circle containing the letter 'A' and the word 'OFF' beside it. Mid-to-high-end models are equipped with both auto start-stop and auto hold functions, eliminating the need to press the brake pedal, thus reducing foot fatigue and improving the vehicle's fuel economy. The new BMW 5 Series is available in two versions: a fuel-powered version and a plug-in hybrid version, and offers two exterior packages: the M Sport package and the Luxury package. The car's dimensions are 4998mm in length, 1901mm in width, and 1559mm in height, with a wheelbase of 3070mm.

114

Share