High-speed black smoke

Symptoms for more than four or five thousand rpm the exhaust pipe smoke clear, vehicle speed power is clearly insufficient. Fault: (1) air filter or clogged air intake passage; (2) main jet cross-sectional area is too large; (3) the main nozzle hole and needle with too much space; (4) the oil level is too high. Solution: (1) clean or replace the air filter paper Filter; (2) replacement of small cross-sectional electric scooter motor area of the main jet. Here to talk about the disassembly and adjustment of the carburetor. First remove the carburetor and air filter, clean or replace the filter filter, open the carburetor main jet cleaning inspection, pilot jet, the amount of air holes, adjust the float chamber oil level to normal, the oil needle transferred last card of a cell, and then refitted the carburetor and air filter, start the vehicle, the car preheat 2min-3min, plunger height adjustment screw to adjust the idle speed minimum, and then adjust the idle air screw to adjust the engine speed up , and then to adjust the idle speed adjustmentelectric motorcycle scooter screw plunger minimum, and then adjust the idle air adjusting screw to speed up, repeatedly adjusted several times, until the lowest position of the plunger, and the engine speed up and running smoothly, that is adjusted to the optimum position. Slow fuel door, the engine speed should be smooth rise, the throttle should be no sense in any block opening, otherwise the needle to remove the card downward adjustments until satisfied.

Motorcycles change

9O's early 19th century to the 20th century, the early motorcycle due to the time taken by new inventions and new technologies, such as inflatable rubber tires, ball bearings, clutch and transmission, front suspension motorcycle engineering shock absorber system, spring seat, etc., which makes the motorcycle car began to have practical value, in the factory production, becomes a commodity, which is the second generation of motorcycles, known as commodities on behalf of the motorcycle. As 1912, the United States produced X -8A Harry single-cylinder motorcycle. Had not yet resolved transmission and drive system, but with a large belt drive pulley attached to the rear wheel, the brake by pulling the handle brake shoes to brake. At that time it did not solve the problem after the shock front shock absorbers have a simple shock collar device attached to the fork on. After the 20th century, after the 1930s, with advances in science and technology, motorcycle production also uses a suspension system to avoid condensation shock, mechanical ignition triumph cub motorcycle system, mechanical drum brakes, chain drive and so on. Make motorcycle again climbed to a new level, motorcycles gradually matured, widely used in transportation, competition and military aspects. This is the third phase of motorcycle - the mature stage. 1936, the United States has been able to create a Harley motorcycle high level. The car uses 1000mL, OHV, 27.93kW V-twin engine, a top speed of 150km / h.

High-speed black smoke

Symptoms for more than four or five thousand rpm the exhaust pipe smoke clear, vehicle speed power is clearly insufficient. 

Fault: (1) air filter or clogged air intake passage; (2) main jet cross-sectional area is too large; (3) the main nozzle hole and needle with too much space; (4) the oil level is too high. 

Solution: (1) clean or replace the air filter paper Filter; (2) replacement of small cross-sectional area of ​​the main jet. 

Here to talk about the disassembly and adjustment of the carburetor. First remove the carburetor and air filter, clean or replace the filter filter, open the carburetor main jet cleaning electric scooter motor inspection, pilot jet, the amount of air holes, adjust the float chamber oil level to normal, the oil needle transferred last card of a cell, and then refitted the carburetor and air filter, start the vehicle, the car preheat 2min-3min, plunger height adjustment screw to adjust the idle speed minimum, and then adjust the idle air screw to adjust the engine speed up , and then to adjust the idle speed Motorcycle spare part adjustment screw plunger minimum, and then adjust the idle air adjusting screw to speed up, repeatedly adjusted several times, until the lowest position of the plunger, and the engine speed up and running smoothly, that is adjusted to the optimum position. Slow fuel door, the engine speed should be smooth rise, the throttle should be no sense in any block opening, otherwise the needle to remove the card downward adjustments until satisfied.

Knowledge of the spark plug

1, the functions and features of the spark plug The role of the spark plug ignition coil high-voltage pulse generated by the introduction of a combustion chamber, an ignition spark generated by the electrode mixture, combustion is completed. Spark plug type generally consists of three parts numbers or letters. Digital representation of the thread in front of the diameter, as the number 1, indicating that the thread Motorcycle spare parts diameter is 10mm, the middle letters of the spark plug is screwed into the length of the cylinder portion; last digit indicates the type of heat: 1,2,3-heat, 5,6 for medium-sized, seven more for cold type. Spark plug "gap" is the main work of the technical indicators, the gap is too large, high-voltage ignition coil and distributor hard to skip generated, resulting in difficulty starting the engine; if the gap is too small, it will lead to a weak spark, but easy to leakage occur. 2, inspection of the spark plug 1) Remove: the high pressure points on the line in order to remove the spark plug and put a mark in the original position to avoid installation dislocation. Note electric motorcycle motor beforehand to remove dust and debris at the spark plug hole in the demolition to prevent debris falling into the cylinder. Stuck with a spark plug when removing spark plug, turn the sleeve to remove it, and in turn lined up. 2) Check: spark plug electrodes normal gray color, such as black electrode burned along with coke, then there is a fault. Check the spark plug and the cylinder can be turned on, in contact with a central high-voltage spark plug terminal, then turn the ignition switch, observe the high-voltage arcing position. Position as arcing spark plug gap, then the role of a good spark plug, otherwise, it will take new ones. 3, the spark plug electrode gap adjustment Spark plug gap were different kinds of models, generally should be between 0.7 ~ 0.9mm, check the size of the gap, can spark plug or thin gauge sheet metal were. If the gap is too big, can handle screwdriver to gently tap the outer electrode to the gap normal; gap is too small, you can use pliers or a metal sheet is inserted electrodes pulled out.