Idle black smoke

Failure phenomenon: When idling vehicle exhaust pipe smoke clear, exhaust sound dull (sometimes wonder muffler damage), we must increase the throttle to start to start. Reasons for failure are: (a) pilot jet is too large; (2) float chamber oil is too high; (3) Start motorcycle engine parts enriched valve is not closed; (4) with the gap needle and main jet hole is too large. Here is the solution: (1) replacing the smaller pilot jet. (2) adjust the float height, observed two-fifths of the oil level is normal oil level float chamber to the float chamber (note, open the lid when viewed under the oil level, the carburetor must be upright, to prevent the gasoline spread out, causing the oil level is not accurate judgment). (3) There are three start-enriched valve forms: manual plunger enriched valve, vacuum diaphragm plunger enriched valve, electric valve plunger enriched. Manual plunger valve repair enriched relatively simple, clean plunger through replacement return spring or cable solve the motorcycle engine types problem. Vacuum diaphragm check valve is mainly concentrated column Saiga vacuum, vacuum diaphragm rupture, leak. Electric plunger valve is usually enriched electrical heating element damage and power line failures, electrical heating element is damaged and must be replaced. (4) Oil needle and main jet holes with the gap is too large to be replaced standards for new accessories.

A brief history of motorcycles

Since 1885 the German carrier Daimler invention manufactured the world's first car with a gasoline engine-powered motorcycles, motorcycle development has gone through 100 years of vicissitudes. The original motorcycle, existing in the real shape of the Museum of Science and Technology in Munich, Germany, is a German Daimler on August 29, 1885 patented invention of the world's first motorcycle priority. Limited to 100 years ago, when the gasoline Triumph tiger cub motorcycle engine is still in the low-naive status, when the vehicle is still for the carriage technology manufacturing stage, the original motorcycles and modern motorcycles are very different in appearance, structure and performance. Mi motorcycle original frame is made of wood. Judging from wood, a carpenter from the processing. The wheel is made of wood. The outer layer covered with a metal wheel. The lower frame is? A square wooden frame on which the engine is placed on both sides of each wooden frame? Small supporting wheels, whose role is to prevent the dumping stationary. As such. This car is actually a four landing. Fan-cooled single-cylinder engine, the output power by two belts and gear reduction drive, driving the rear wheels forward. Made saddle seat, wrapped in a layer of leather. Its working volume of the engine cylinder 264mL, maximum power 0.37kW (7OOr / min), only one fifth of modern motorcycle engineering motorcycle simple. Speed ​​of 12km, not much faster than walking. Ding did not spring from other cushioning device, this car was known as the "shock of bone car", it is conceivable. In the 19th century stone street driving, simply worse than execution. Although the original motorcycle is so simple, but since a motorcycle to constant change, continuous improvement, only 100 years the descendants of hundreds of millions of units of modern motorcycle.

Idle black smoke

Failure phenomenon: When idling vehicle exhaust pipe smoke clear, exhaust sound dull (sometimes wonder muffler damage), we must increase the throttle to start to start. Reasons for failure are: (a) pilot jet is too large; (2) float chamber oil is too high; (3) Start enriched valve is not closed; (4) with the gap needle and main jet hole is too large. Here is the solution: (1) replacing the smaller pilot jet. (2) adjust the float height, observed two-fifths of the oil level is normal oil level float chamber to the float chamber (note, open the lid when viewed under the oil level, the carburetor must be upright, to prevent the gasoline spread out, causing the oil level is not accurate judgment). (3) There are three start-enriched valve forms: manual motorcycle engine parts plunger enriched valve, vacuum diaphragm plunger enriched valve, electric valve plunger enriched. Manual plunger valve repair enriched relatively simple, clean plunger through replacement return triumph cub motorcycle spring or cable solve the problem. Vacuum diaphragm check valve is mainly concentrated column Saiga vacuum, vacuum diaphragm rupture, leak. Electric plunger valve is usually enriched electrical heating element damage and power line failures, electrical heating element is damaged and must be replaced. (4) Oil needle and main jet holes with the gap is too large to be replaced standards for new accessories.

High-speed black smoke

High-speed black smoke, failure phenomenon as four or five thousand rpm or more obvious when the exhaust pipe smoke, 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 electric scooter motor 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 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 motorcycle engine types 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 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.