Analysis And solution upon Typical Carburetor fault (2)
Carburetor is a truthfulness mechanical device of motorcycle. It is as important as the heart for motorcycle engine. From a professional dwindling of view, its failure rate should be completely low. But in actual use, its failure rate isn’t low.
- Oil leakage
There are two kinds of oil leakage:
1.Rapid leak.
Overflow tube leak quickly, sometimes going on financial credit tube furthermore leak speedily which cause the fuel flow into the engine combustion chamber and the vehicle can’t start.
The cause are as follows:
1.1 There is some huge dirt stranded in float bowl.
1.2 Float oil leak.
1.3 Float can’t assume dexterously at the float pin.
The solution is:
Clean float needle and feeding pipe, if the float is damaged, next replace it. Or weld it after tidy out the oil inside the float.
2.Slow leak
There is a fall of leaking per several minutes after parking the motorcycle for hours. The cause of the trouble is that float or float needle is damaged suitably the seal is poor.
The answer is:
Replace attributed float needle and its component. If the problem nevertheless cannot be solved, then you can fix it once float needle restorer.
- Smoke fault
The motorcycle carburetor is like the front of motorcycle, whether the absorption is fine mainly depends on the stomach. so smoke is a kind of indigestion, afterward people have diarrhea. The main reason is that mix is too thick, the fuel consumption will be larger due to the black smoke, and it will also easily broken therectifier regulator and influent speedup.
There are two kinds of smoke fault.
1. Idling smoke
There is large amount of smoke as soon as idling, the exhaust noise is neutral and you compulsion to step upon the gas to start.
The causes are:
1.1 The idle orifice is too large.
1.2 The oil level of float chamber is too high.
1.3 The begin enriching valve is not closed.
1.4 There is a big clearance between oil needle and main nozzle.
The resolution:
A: correct a smaller idling jet.
B: become accustomed the culmination of the float, put oil level upon 2/5 of the float chamber, which is the
normal oil level. interest note that once initiation the cover to observe the oil level, the carburetor must remain stand, in stroke the fuel spill out which will cause the inaccurate judgment of the oil level.
C: There are three nice of starting enriching valve: the directory plunger valve, vacuum plunger valve and electric plunger valve. The directory plunger valve can be repaired easier, by cleaning the plunger or replacing the spring or wire. For the vacuum plunger valve, you dependence to check if there is any broken or leak of the valve or vacuum diaphragm. For the electric plunger valve, it is generally the aberration of electric heating unit or supply line, next you dependence to replace the electric heating unit.
D: If there is a large clearance in the midst of oil needle and main nozzle, new parts likechain and sprocket should be replaced.
2. High-speed smoke
There is large quantity of black smoke afterward the revolving zeal of motorcycle achieve four or five thousand, which shows the obvious deficiencies of the motorcycle at a tall speed.
The cause:
2.1 There is congestion at ventilate filter or inlet channel.
2.2 The place of main orifice is too large.
2.3 The clearance amongst main nozzle and oil needle is a too large.
2.4 The oil level is too high.
The solution:
A tidy air filter or replace paprt cartridge.
B Replace a smaller main orifice.
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Hope these will encourage you know more approximately your motorcycle carburetor.
Thanks for your become old and attention to motorcycle accessories.
