Two must-see tips for motorcycle maintenance
Some of the motorcycle owners always ignore small parts as soon as undertaking the keep for their motorcycle, and later it will leave some problems or environment issues for the motorcycle even after repaired and fake the sustain life.
Here we will discuss more or less some misery which is easy to be ignored in the process of motorcycle maintenance, later circuit, oil, gas or mechanical parts.
1.Minimum ignition speed
In general, magneto ignition system has minimum ignition promptness and it can ensure that the ignition system can pull off tall voltage ignition at low engine speed. However, most repairman will usually sever the spark plug upon the fault engine and get the arcing tests on high-pressure damping cap bearing in mind there is a ignition failure. These methods are simple and simple and have been widely adopted by them. But some engine failure afterward difficult to start, is due to ignition coil and the electronic igniter like a high ignition speed.
Such as Honda CH125 water-cooled scooter, its minimum ignition promptness is 300 r/min. If the minimum ignition sham reduces, the minimum ignition swiftness increase, and it sometimes even dependence to achieve more than 400 r/min to ignite. If the repairman yet use easy arcing tests as above, next they may be fooled by some untrue atmosphere and even mislead. This is because there is no compression resistance in the cylinder in the same way as the piston runs up and beside without spark plug in the engine; the begin zeal is above 400 r/min, which is much vanguard than in imitation of enthusiasm when the spark plug.
Therefore, past using the spark plug or ignition coil to ignite, make distinct to install a spark plug in the engine, or it is even improved to use electronic tachometer to ham it up begin speed. If using the old-fashioned battery concerning 12 V, the start enthusiasm is in relation to 300 r/min to 350 r/min, the spark is weak, even though using the new battery above 13.5 V, the begin quickness is more than 400 r/min, the spark is blue and white, next we can acquire a preliminary conclusion: the minimum ignition enthusiasm is too high. Then, you obsession to test the achievement of each electric equipment of ignition system, and replace the ignition coil and electronic igniter for contrast test, which can eliminate the failure.
2. The ignition triggers gap or the ventilate gap
The ignition system of motorcycle engine generally adopts the flywheel rotor type, even if magnet and flywheel are united into one and form as a ration of the engine flywheel, and steadfast magnets swing together in imitation of the flywheel and form a magnetic field, next there will be induced current in the resolved coil, at the same grow old play a part a role of mechanical excitement storage and release. Four-stroke engine use non-contact ignition system, the start coil of magneto is at the outside of the flywheel rotor, where there is a long-lasting magnets, like the rotor rotating, start coil will induce pulse current and have enough money get going signal to electronic ignition device (CDI).
In order to ensure that the ignition system has a strong ignition activate signal, while it will not interfere activate poles and flywheel rotor, thus there is put into action gap a propos 0.40 mm to 0.80 mm surrounded by the activate pole and the flywheel rotor. In general, the gap can be adjusted by the mounting hole or oval hole on start pole. Due to the error at manufacturing, or reassemble after repair, or trigger pole wear and tear, the ignition activate gap may get bigger, correspondingly affecting engine ignition behave in stand-in degrees. Besides, there is next expose gap with cylindrical stator and flywheel magnetic, under usual circumstances, unilateral ventilate gap should be no greater than 0.75 mm, in order to ensure the magneto ignition and charging system appear in normally.
For a 125 type motorcycle, driving more than 43000 kilometers, after the stator component was untouched for the magneto fault and then electric begin can’t produce an effect while the pedal begin is normal. Then, repairman will check both static and operating of battery voltage, which turns to be normal, overrunning clutch, start circuit and relay are as well as normal, later check thelawn starter circuit, carbon brush and correspondingly on, they are all normal. remove the spark plug, put it upon the high-pressure damping hat and reach electric start check, the spark is dark red, and after changing a spark plug, electric begin is still not working. next you craving to replace the stator coil, and surgically remove the ventilation cover, check the get going gap in the middle of flywheel and get going pole, there are immediately not quite 2.0 mm. Realigns the get going to pleasing 0.50 mm, reinstall the parts, then electric start can acquit yourself rich now.
You can be seen from the examples above, repairman didn’t adjust the activate gap according to the rule bearing in mind varying the stator component, the ignition start gap will be too large. behind applying the pedal start, because recoil inertia is big, it can barely reach begin speed; and in the same way as electric start, because starter readiness is relatively low, the large gap will reduce the pulse signal, the spark is not strong plenty to start. And the other motorcycle can’t be started because the let breathe gap is too big amid cylindrical stator and the flywheel rotor magnetic cylinder wall, which will seriously operate the ignition proceed of magneto.
In a word, past preserve the failure of ignition system, don’t ignore the ignition activate gap and let breathe gap.
Hope this will urge on you to acquire an effect braking mannerism and know more approximately your motorcycle accessories.
Thanks for your attention.
