What is the principle behind the whistling sound of a motorcycle engine?

1 Answers
JoelLynn
07/29/25 10:08pm
When the engine is at low RPM, the exhaust pressure in the backpressure pipe is relatively high, allowing the expelled exhaust gases to be directed into a curved pipe, which produces a whistling sound. Additional information about motorcycles is as follows: Definition: A motorcycle is a two- or three-wheeled vehicle powered by a gasoline engine, steered by handlebars that control the front wheel. It is lightweight, agile, and fast, widely used for patrolling, passenger and cargo transport, and also serves as sports equipment. Broadly, motorcycles are categorized into street bikes, road racing motorcycles, off-road motorcycles, cruisers, and touring bikes, among others. Basic components: A motorcycle consists of five main parts: the engine, transmission system, running gear, steering and braking systems, and electrical instrumentation equipment.
Was this review help?
20
1
Share
More Forum Discussions

What does an engine speed of 1700 mean?

An engine speed of 1700 means 1700 revolutions per minute. The vehicle speed varies at 1700 rpm in different gears. First gear: In first gear, the engine speed is around 1000-1500 rpm, and the vehicle speed is 10 kilometers per hour. Second gear: In second gear, the engine speed is around 1500-2000 rpm, and the vehicle speed reaches 30 kilometers per hour. Third gear: In third gear, the engine speed is around 1500-2000 rpm, and the vehicle speed reaches 40 kilometers per hour. Fourth gear: In fourth gear, the engine speed is around 1500-2000 rpm, and the vehicle speed reaches 50-70 kilometers per hour. Fifth gear: In fifth gear, the engine speed is around 1500-3000 rpm, and the vehicle speed reaches 80-120 kilometers per hour.
11
3
Share

What transmission does the Audi A3 use?

Audi A3 mainly has the following two models, and different models use different transmissions. They are: 1. The Audi A3-1.4T model uses a Volkswagen EA211-coded 1.4T displacement engine with a maximum torque of 250N·m, paired with a DQ200-coded dry dual-clutch transmission that also has a maximum torque limit of 250N·m. 2. The Audi A3-2.0T model uses a Volkswagen EA888-coded 1.8T displacement engine with a maximum torque of 300N·m, paired with a DQ380-coded wet dual-clutch transmission that has a maximum torque limit of 380N·m.
7
3
Share

Where to Install ETC?

ETC is generally installed on the right side of the rearview mirror inside the car, on the windshield above the passenger seat. The installation requirements are as follows: 1. The height should be no less than 1.2 meters and no more than 2.5 meters; 2. The installation angle should be between 30 and 90 degrees; 3. For small vehicles such as cars and minivans, the OBU device should be installed in the upper middle part of the front windshield, while for large vehicles like trucks and buses, it should be installed in the lower middle part; 4. For vehicles with built-in or aftermarket explosion-proof film, since the film contains metal ions that may interfere with microwave communication signals, the ETC should be installed on the microwave sunroof strip or a rectangular area of 8 to 10 centimeters should be cut out of the explosion-proof film; 5. If the car windshield is too thick or has been modified, it may cause ETC signal transmission failure, and professional assistance from a repair shop should be sought.
1
4
Share

What are the causes of engine cylinder scoring?

There are several reasons for engine cylinder scoring: 1. Hard objects falling into the combustion chamber. 2. Intake or exhaust valve spring breakage, causing the valve to drop into the cylinder. 3. Replacement pistons with incorrect geometric dimensions during major overhaul. 4. Excessive thickness of replacement connecting rod bearings or gaskets during major overhaul. 5. Failure to form an oil film between the cylinder wall and piston rings/piston, resulting in poor lubrication or even dry friction. Engine cylinder scoring refers to noticeable longitudinal mechanical scratches and abrasions on the cylinder wall within the piston ring's movement range. In severe cases, it can lead to adhesive wear, causing difficulties in engine starting or spontaneous stalling. Cylinder scoring is a major engine failure.
9
4
Share

How to reset the maintenance light on a Zotye T700?

The method to reset the maintenance light on a Zotye T700: 1. Turn off the ignition switch; 2. Simultaneously press and hold both buttons on the instrument panel; 3. Turn the key to the position where all instrument lights illuminate; 4. Wait until the wrench light turns off; 5. Release both buttons, including the mileage reset button; 6. Turn off the ignition switch and then turn it back on; 7. The maintenance reset is now complete. The Zotye T700 is a mid-to-large-sized SUV, measuring 4748 mm in length, 1933 mm in width, and 1697 mm in height, with a wheelbase of 2850 mm. The Zotye T700 is equipped with two engines: a 1.8L turbocharged engine and a 2.0L turbocharged engine.
17
4
Share

Do New Cars Need Break-in Oil During the Break-in Period?

New cars do not require break-in oil during the break-in period as it has little effect. Below is an introduction to break-in additives for new cars: 1. Break-in additives for new cars are engine break-in additives, which are lubricating additives with cleaning and dispersing properties. They are used in engines during the break-in period to prevent issues such as cylinder scuffing, bearing seizure, and early wear. 2. During the break-in period of a new car, it is necessary to quickly bring the various friction surfaces of the engine into good working condition. Generally, high-quality break-in additives consist of antioxidants, corrosion inhibitors, and viscosity improvers, providing certain protective effects for the engine. In contrast, inferior products are mostly simple anti-wear agents that reduce friction, which can prolong the break-in period and is not beneficial for the break-in of a new car.
2
0
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.