China Motorcycles Suppliers,Electric Bikes and Agricultural Appliances Manufacturers

For the classification of motorcycles, different countries have different classification methods. International standards (ISO3833-1977) divide motorcycles into two categories according to speed and weight: dual-purpose motorcycles and motorcycles. There are two general classification methods for Chinese motorcycles: one is divided into mopeds and motorcycles according to displacement and maximum design speed. The moped engine has a working volume of no more than 50 ml and a maximum design speed of no more than 50 km. Motorcycle refers to a two- or three-wheeled motorcycle with a working volume of more than 50 ml and a maximum design speed of more than 50 km. The other is divided into two categories: two-wheeled motorcycles, side tricycles and three-wheeled motorcycles according to the number and position of the wheels.

It is customary to categorize by application, structure and engine type and working volume. If you only work in the city, a short-distance travel tool, choose a miniature motorcycle or moped with a compact speed of no more than 50 kilometers. Need to travel frequently between urban and rural areas, can ride two people, should choose an ordinary motorcycle with an engine working volume of 125 ~ 250 ml. If the road conditions are poor, high speed driving or general competition is used, the off-road motorcycle is used.

Sports motorcycle
Sports motorcycles are also called sports motorcycles. The main idea of design is for people to take a leisure vacation. It is a fun means of transportation and a play tool for experiencing the joy of life. Sports motorcycles cover a wide range. The super sports motorcycles and travel motorcycles described below all have the function of sports motorcycles, so they can also be classified as sports motorcycles.

Road motorcycle
Motorcycles mainly used on paved roads are called road motorcycles. Road motorcycles can be divided into three categories, namely super sports motorcycles, travel motorcycles and American motorcycles. Since this type of motorcycle is mainly driven on a flat pavement, it is also called an urban motorcycle. The concept and scope of road motorcycles are also very ambiguous, and it may be better to call them ordinary motorcycles. In terms of structure, road motorcycles are only suitable for paving roads. Such motorcycles can achieve the best performance on paved roads. Conversely, there will be many difficulties when driving in no roads. Corresponding to the off-road motorcycles, classified by location, can also be divided into travel cross-country motorcycles and urban off-road motorcycles.

Superbike
Motorcycles generally value the comfort and ease of handling when driving. Super sports motorcycles are different, and it pays more attention to the high-speed driving performance of motorcycles. By riding this kind of motorcycle, the rider can fully feel the pleasure and fun of the engine, tire and road changes. Unlike the racing motorcycle, it pursues the youthful movement of the ride, rather than pursuing high speeds like a racing motorcycle. Without a certain high-speed performance to ensure that the rider is difficult to experience this pleasure, so the speed of the motorcycle must be increased. But once you can feel the thrill of riding, you don't have to increase the speed.

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The electrical circuit of a motorcycle is basically similar to that of a car. Electrical lines are divided into power supply, ignition, lighting, instrumentation and audio.

The power supply part is generally composed of an alternator (or powered by a magneto charging coil), a rectifier, and a battery. The magnetic motor for motorcycles has various structures depending on the model of the motorcycle. There are generally two forms of flywheel magneto and magnetic steel rotor magneto. Flywheel magneto motors are generally used on small displacement miniatures and mopeds. Within the flywheel, four magnetic steels are evenly distributed and rotate with the engine crankshaft. The stator frame is fixed on the crankcase with magnetic on it. The motor coil, the lighting coil, and the breaker assembly, when the flywheel rotates, the magnetic field lines of the magnetic field alternately pass through the coils, so that the coil generates induced alternating current. In the magnetic steel rotor type magneto motor, the structure is opposite to the above, six magnetic steels are evenly distributed on the circumference of the rotor, the magnetic steel and the rotor are die-cast together with an aluminum alloy, and the rotor is connected to the crankshaft by a key. Six sets of coils wound around the core are distributed in the stator. As the rotor rotates within the stator, the lines of magnetic force alternate through the stator coils to induce an alternating current.

The ignition mode of the motorcycle includes three kinds of battery ignition system, magnetic motor ignition system and transistor ignition system. In the ignition system, there are two types of contact capacitor discharge ignition and contactless capacitor discharge ignition. The contactless capacitor discharge is abbreviated as C.D.I. C.D.I actually refers to a combination circuit of a capacitor charging and discharging circuit and a thyristor switching circuit, commonly known as an electronic igniter.

There are various colors of wires distributed in the motorcycle circuit. It is customary to use the red wire as the power "+" line, the black wire as the ground line "-" line, the orange line to the ignition coil wire, and the magneto motor output current as the white wire. Blue is the headlight line, etc. This is just a general usage for reference.

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1. Complete motorcycle inspection of motorcycles

First of all, the appearance inspection, the parts of the motorcycle should be intact, there is no missing parts, the paint layer, chrome plating, galvanized parts should be bright and shiny, without scratching and falling off. motorcycles should have product certification, product instruction manual, and pick-up spare parts and tools according to the packing list. Then start the inspection. At normal temperature, the cold start is not more than three times, and the hot motorcycle should be started once. There should be no abnormality and knocking sound when the engine is running, the idle speed is stable, and there is no leakage of gasoline or oil.

2. Inspection and adjustment of components

(1) Front wheel brake. The front wheel brake is operated by the right hand and the free travel is first checked. The free-travel stroke refers to the stroke from the start of the handle to the start of the brake. Before the stroke is too small, the brake shoe block and the front wheel brake drum cannot be completely disengaged, which affects the driving speed; if the stroke is too large, the braking efficiency cannot be braked in time.

(2) Rear wheel brake. The rear wheel brake is operated by the pedal. First, check the free travel of the brake pedal.

(3) Clutch. The clutch is normally operated by the left hand and its free travel is checked during adjustment.

(4) Rear shock absorber.

(5) Rear drive. The rear drive adjustment is mainly to check the tightness of the transmission chain (drive belt). The inspection position is in the middle position between the front and rear sprocket (pulley). Use the finger to move the chain up and down to see the distance between the upper and lower movements. The scooter is 10~ 20 mm, ordinary motorcycles are 20 to 30 mm. Triangular drive belt tightness, press by hand [press with 49 Newton (5 kg force)] belt, the belt droops 10 to 20 mm.

(6) motorcycleburetor idle speed. Idle speed is the lowest steady speed when the engine is unloaded. When the throttle handle is placed in the minimum position, the engine can keep running continuously. When adjusting, first start the engine, gradually turn the throttle handle, check the free stroke of the throttle handle, generally set to 2 ~ 6 mm, if the rotation does not exceed 2 mm, the engine speed will rise, indicating that the free travel is too small; If the stroke exceeds 6 mm and the engine speed does not increase, the free travel is too large.

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(1) Steering: The front wheel and the handlebar cooperate to control the driving direction of the motorcycle. The handlebar is mounted on the upper plate. When the handlebar rotates around the direction column, the upper and lower plates are rotated, and the front wheel is rotated by the front shock absorber. The right end of the handlebar is equipped with a throttle handle for controlling the opening of the carburetor throttle valve and a brake lever for controlling the front wheel brake; the left end is provided with a grip and a handle for controlling the clutch. Rear view mirrors and various electrical switches are also mounted on the left and right ends of the handlebars. The handlebars and brake levers control the front wheel brakes, clutches and carburetor through the cable. The cable has different specifications. The brake and clutch are 1×19 outer diameter ∮2～∮2.5mm single-strand steel wire rope. The carburetor uses 1×7 outer diameter ∮1.2～∮1.5mm single-strand steel wire rope.

(2) Braking: Generally, the front wheel brake is controlled by the hand brake lever, and the rear wheel brake is completed by the foot brake pedal. Motorcycle brakes are available in both mechanical drum brakes and hydraulic disc brakes. The structure of the drum brake is similar to that of a car or a tractor. The brake shoe is die-casted from aluminum alloy with a friction brake pad attached thereto. The brake cam is rotated by the brake arm and the brake shoe is pushed open to brake.

The brake consists of a fuel tank, a plunger valve oil pump (both on the handlebar), a hydraulic oil pipe, a brake caliper, and a brake disc. The brake misalignment is fixed together with the front fork guide and is a fixed part of the brake device. The brake disc is fixed to the wheel and rotates with the wheel. When braking, hold the brake lever and move the plunger valve to push the hydraulic oil along the hydraulic oil pipe into the two cylinders of the brake caliper. Under the action of the pressure oil, the cylinder pushes the friction plate to clamp the brake disc from both sides, generating a large frictional resistance, forcing the wheel to stop rotating. When the brake is released, the pressure in the hydraulic circuit quickly drops back, and the cylinder drives the friction plate to return to the original position to release the brake.

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