What Causes Engine Vibration After Maintenance?

What is the motorcycle driving license category?

Motorcycle driving licenses are not categorized as C licenses, but rather as D, E, and F licenses. Below are the relevant introductions: 1. D License: The D license is a type of driving license (driver's license). The permitted vehicle types include ordinary three-wheeled motorcycles and the vehicle types permitted by E and F licenses. The D license allows driving three-wheeled motorcycles with an engine displacement greater than 50ml or a maximum design speed exceeding 50km/h, and it also permits driving other vehicle types covered by E and F licenses. 2. E License: The E license is a type of driving license (driver's license). The permitted vehicle types include ordinary two-wheeled motorcycles and the vehicle types permitted by the F license. It allows driving two-wheeled motorcycles with an engine displacement greater than 50ml or a maximum design speed exceeding 50km/h, as well as F license-permitted vehicles. 3. F License: The F license indicates that the holder is permitted to drive light motorcycles. According to the 'Regulations on the Application and Use of Motor Vehicle Driving Licenses,' motorcycles are described as those with an engine displacement of 50ml or less and a maximum design speed of 50km/h or less. No other vehicle types are permitted to be driven with this license.

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How to Repair Slightly Deformed Motorcycle Wheel Hubs?

Methods for repairing slightly deformed motorcycle wheel hubs: Use a gas welding torch to heat the wheel hub: After heating, gently tap along the original contour to gradually restore the deformed rim edge to its original shape. Use an angle grinder for grinding: Polish with a polishing disc and spray paint of the same color for cosmetic treatment. The wheel hub is a cylindrical metal component that supports the tire from the inside and is mounted on the axle. There are various types based on diameter, width, forming method, and material. For ordinary vehicle models, wheel hubs are less considered in terms of appearance, with good heat dissipation being a basic requirement. The process generally involves baking paint treatment, which means spraying first and then electric baking. This method is cost-effective, provides bright colors, and maintains durability for a long time. Even when the vehicle is scrapped, the color of the wheel hub remains unchanged.

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Can a car pass the emissions test without a catalytic converter?

Without a catalytic converter, the emissions test will definitely not be passed. If the catalytic converter is missing, the engine emission warning light on the instrument panel will illuminate, and the vehicle's exhaust emissions will significantly exceed the legal limits. Driving such a vehicle on the road may result in traffic violations being recorded, leading to fines and other penalties. Additionally, if the vehicle is due for its annual inspection, it will certainly fail the test without a catalytic converter. Components of a catalytic converter: A catalytic converter typically consists of four main parts: the shell, the vibration damping layer, the substrate, and the catalyst coating. Shell: Made of stainless steel to prevent oxidation and flaking, which could clog the substrate. Vibration damping layer: Composed of padding or wire mesh, it serves to seal, insulate, and secure the substrate. To protect the substrate from damage due to vibration or thermal deformation, the padding is made of expanded mica and aluminum silicate fibers, bonded together with adhesive. Substrate: Constructed from honeycomb-shaped ceramic materials, though many are also made of metal (including stainless steel). Catalyst: Composed of precious metals such as platinum, rhodium, and palladium, sprayed onto the substrate to form the purifying agent. Lifespan of a catalytic converter: The lifespan of a catalytic converter generally ranges between 80,000 to 100,000 kilometers. The actual lifespan depends on the vehicle's usage, fuel quality, and driving conditions.

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What is the tire size of the new CRV?

2021 Honda CRV comes with 3 tire specifications: Model 235/65R17: The 1.5T manual two-wheel drive classic version, comfort version, urban version, fashion version, and four-wheel drive luxury version of the 2021 Honda CRV use this 17-inch tire. The original tire brand is: YOKOHAMA, and the tread pattern is: GEOLANDAR G98. Model 235/60R18: The 1.5T four-wheel drive premium version, 2.0L two-wheel drive pure version, pure speed version, pure ride version, and four-wheel drive pure gallop version of the 2021 Honda CRV use this 18-inch tire. The original tire brand is: Michelin, and the tread pattern is: PRIMACY 3ST. In addition, there is also a tire brand: Bridgestone, and the tread pattern is: DUELER H/P 33. Model 235/55R19: The 1.5T four-wheel drive premium version, two-wheel drive and four-wheel drive black jazz version, 2.0L two-wheel drive pure version, four-wheel drive pure enjoyment version, and two-wheel drive and four-wheel drive black jazz version of the 2021 Honda CRV use this 19-inch tire. The original tire brand is: Michelin, and the tread pattern is: LATITUDE SPORT 3.

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How to Repair a Broken Headlight Tab?

Headlight tab repair can be divided into two scenarios. Broken mounting tab: If the internal glass or mechanical components are not damaged and the lighting function remains unaffected, the tab can usually be repaired by reattaching it. Most repair shops can handle this. Plastic parts can be welded back together. However, if internal components are damaged before repair, the headlight may not perform like new. Direct replacement: If the broken tab cannot be repaired or if it affects the internal lighting (beam) function, consider replacing the entire headlight. Unless it's a high-end vehicle where headlights cost thousands or tens of thousands (making repair worthwhile for internal components), we recommend purchasing a new one (especially for domestic vehicles) as it's both cost-effective and safer.

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What causes fogging inside a car's LED lights after washing?

There are several reasons why fogging occurs inside a car's LED lights after washing. Light structure design: The more regular the internal structure of the light and the larger the gaps between components, the faster the air circulation, making it less prone to fogging. Narrow areas have the opposite effect. Physical reasons: The presence of condensation nuclei inside the light, such as dust particles entering the lamp cavity, lens, or inner surface of the cover, creates conditions for water molecules in the air to condense due to the rough surfaces. Poor sealing of the assembly: During headlight modifications, inexperienced car owners may open and close the lights improperly, allowing moist air to enter the lamp cavity.

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What Causes Engine Vibration After Maintenance?

What is the motorcycle driving license category?

How to Repair Slightly Deformed Motorcycle Wheel Hubs?

Can a car pass the emissions test without a catalytic converter?

What is the tire size of the new CRV?

How to Repair a Broken Headlight Tab?

What causes fogging inside a car's LED lights after washing?

Are the headlights replaced at a 4S store genuine?

V6 Engine Firing Order?

Is a Compulsory Traffic Insurance Policy Required for Vehicle Inspection Now?

What is the difference between 4pr and 6pr motorcycle tires?