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Views: 103 Author: Site Editor Publish Time: 2019-09-13 Origin: Site
Motorcycles, driven by gasoline engines, are two-wheeler or tricycles that are operated by steering the front wheels with handles. They are light and flexible and travel quickly. They are widely used for patrol, passenger and cargo transportation, etc.. They need to be inspected and adjusted during purchase and sale.
Firstly, the appearance inspection, the parts of the motorcycles should be intact, there is no missing parts, such as motorcycle stand, motorcycle wheel chock and motorcycle bolts. 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 customers should pick-up spare parts and tools according to the packing list. Then starting inspection, at normal temperature, the cold motorcycles starting is not more than three times, and the hot motorcycles 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.
(1) Front wheel brake. The front wheel brake is operated by the right handle and the free travel should be first checked. The free-travel refers to the stroke from the start of the handle to the start of the brake. Before the stroke is too small, the brake 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, so check the free travel of the brake pedal first.
(3) Clutch. The clutch is normally operated by the left handle 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 the belt by hand [press with 49 Newton (5 kg force)], the belt droops 10 to 20 mm.
(6) Carburetor 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, then check the free travel 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, it means that the free travel is too large.
(1) Instrument and witch arrangement
(2) Electrical circuit
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, 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 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. The motor coil, the lighting coil and the breaker assembly are fixed on it. When the flywheel rotates, the 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 types: battery ignition system, magnetic motor ignition system and transistor ignition system. In the ignition system, it can be divided into two types: contact condenser drode ignite and contactless condenser drode ignite. The condenser drode ignite 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, the magneto motor output current is the white wire, and the blue is the headlight line, etc. This is just a general usage for reference.
Founded in 2008, JIAXING JUJIE HARDWARE TOOL CO.,LTD is located in Jiaxing Zhejiang. It is a factory engaged in producing motorcycle bolts, motorcycle stand/lift and wheel chock, motorcycle tie down, motorcycle tool, plastic can and cnc parts. Get more information and details about our motorcycle tools, please contact us at any time.
