Mopeds made in China break down quite often, this depends not only on poor-quality parts, it is important to operate the moped correctly and monitor the condition of its parts. But many owners of Alpha mopeds are faced with a problem when their vehicle simply does not start. After reviewing most of the possible causes, the owner notices that there is no spark on the moped. Without a spark, the moped will not start, and there can be several reasons for the breakdown. Most of the reasons are quite banal and lie in minor breakdowns, but if all the steps below do not help, you will have to completely rebuild the moped or take it to a specialist. Diagnosis of lack of spark is carried out in several procedures below.
Checking the generator and its windings
It is the generator that allows you to produce a spark, so if the spark on the alpha moped disappears, look at the generator. First of all, look at all the contacts and wires adjacent to the generator. They can be either bare or broken off. After checking the contacts, diagnose condensates; they should work correctly on all mopeds.
In some cases, mechanical damage to the generator is possible; to do this, you will have to carefully inspect the winding for defects. If a problem is identified, it will be easier to replace the generator with a new one.
Photo report: How to check a scooter's generator?
Just like that, without minimal knowledge of electronics, at least at the school curriculum level (like mine) and a simple multimeter tester, you won’t be able to test the generator, don’t even dream about it. Before taking on such work, you should at least be able to use a tester and understand that current can be alternating or constant, know what an electrical impulse is and what resistance is. Do you know all this? Have you held a tester in your hands? If yes, then let's not hesitate.
Checking the functionality of the generator should begin with measuring the voltage that the generator itself must generate and transmit through wires to consumers. We look at where the wiring harness from the generator comes out of the engine - we move along it until we reach the connector with which the generator is connected to the on-board network of the scooter.
On the vast majority of scooters, the alternator connector looks something like the picture. In the common connector, there is one plug and two wires that are connected to the scooter’s on-board network through round terminals.
The plug combines the connectors of the two main windings of the generator: The working winding (yellow wire), which ensures the operation of the headlights, turn signals, lights and other consumers. And the control winding (white wire), the control winding provides voltage control in the main winding of the generator. That is, when the voltage in the operating winding of the generator increases above the specified limits, the relay-voltage regulator supplies current to the control winding of the generator, due to which the voltage in the operating winding of the generator drops to the specified limit. When the voltage drops, the reverse process occurs.
In this generator, the main windings are wound with thick copper wire on six coils.
The third winding of the generator, which is usually called high-voltage or inductive, and the magnetic induction sensor of the generator are connected to the scooter’s on-board network through round terminals.
High-voltage winding of the generator - ensures the generation of high alternating voltage (the voltage in this winding can reach 160 V or more), which directly enters the switch where it is rectified, then accumulated in the capacitor and at a certain moment in the form of a pulse is supplied to the ignition coil.
In this generator, the high-voltage winding is wound with a thin copper wire on two coils. The high-voltage winding coils are carefully insulated on the outside.
There are generators in which the high-voltage winding is wound on only one coil.
A small clarification: ignition systems in which a DC CDI type switch is installed, the high-voltage winding does not participate in the formation of a spark charge on the spark plug, so there is no point in checking it. Scooter manufacturers install a generator with a high-voltage winding, but do not use it (meaning ignition systems with a DC CDI switch). It's just wound on the generator and that's it. I will say more: due to the fact that the winding is not loaded with anything during operation of the generator, over time it simply burns out.
An example of a generator, on two coils of which a high-voltage winding that is not involved in operation is wound. I checked this winding - the tester showed an open circuit, which confirms the above.
The resistance of the generator's inducing winding is always greater than that of the other windings. The wire coming from the inducing winding of the generator is almost always red and black.
The magnetic induction sensor, when a special ledge on the generator rotor passes past it, generates an alternating pulse that opens a theristor through which the switch capacitor is discharged to the ignition coil.
Ignition coil
And finally, the last, but one of the most important reasons for the lack of a spark, is the ignition coil, or rather its breakdown. With the proper knowledge, you will have to check the functionality of the ignition coil; to do this, you need to connect a low-power light bulb to it, which should check the current supply from the coil.
In most cases, you can fix the lack of a spark yourself; fortunately, the design of mopeds such as Alpha is quite simple, the design is created in such a way that all parts are visible and can be quickly replaced. Also, the cost of spare parts for Alpha mopeds is low, which is a big plus. But if you cannot find the cause of the breakdown yourself, we recommend turning to professionals.
Checking the spark plug for serviceability
First of all, to determine the serviceability of a spark plug, know where to find it. As a rule, to do this you need to remove the plastic, for this you need to have a screwdriver. Let's assume that there are no problems with this, let's move on to the reason. The first and main check of the condition of a candle is its appearance. It should look working and in good working order, this is not difficult to determine. Minor soot is allowed. But if the spark plug is melted or black, then it is clear that it is faulty and the spark cannot flow.
To determine the cause of carbon deposits on spark plugs, you need to determine whether it is wet or dry? Has the candle turned black on one side or all at once? The answers to these questions will give you the direction in which you need to “dig.” You can find out why candles turn black here.
Alfa moped no spark
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- Publicado em 14 Out 2014
- After work we were going to go home, but my friend’s moped didn’t start. He unscrewed the spark plug, there was no spark, replaced it with another one, the same result. Since it was one o’clock in the morning, he pushed his moped to my garage, and I drove him home ( he lives in a neighboring village). In the morning I decided to see what the reason was. First, I checked all the contacts, then I rang the armor wire with a multimeter, then I changed the coil (I have it in stock). There was still no spark, then I changed the switch (I removed it from my moped) , but the spark never appeared. But when I checked, the current from the armored wire began to flow and I decided to try to install my own spark plug, as it turned out the whole problem was in the chip from the switch, the contacts went loose there, but when the spark disappeared, the owner changed the spark plug to a non-sparking one working. His second spare one was also not working. In the end, of course, I found a malfunction, but it could have been found faster. I concluded for myself that in any case it is necessary to check the functionality of the spark plug (even if they only installed another one before your eyes)) ), well, the owner didn’t draw any conclusions and I’m waiting for him again in my garage soon))). Naturally, not everything was included in the video, since it would have turned out to be a very long video, so I had to cut something out.
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- Moped (Product Category)Auto Show (Event)moped alphamoped deltaalpha rulitchina rulitalfa 120km/hrotates for alfemoped alpha tuningmoped alpha repairchinese moped alfairbis viragoalpha phantomirbis virago
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The third reason is the generator
If after replacing the ignition coil and switch the spark does not appear, then we check the generator. Here we need a multimeter. We set the device to the diode position, remove the generator chip and begin the test. Two wires are responsible for the spark:
- blue with a white stripe is a hall sensor;
- black with a red stripe is the coil on the generator.
Generator chip
Check the hall sensor. We connect the probe from the device to the blue wire with a white stripe. And we connect the other probe to engine ground. Numbers should appear on the device, indicating that the hall sensor is working.
We do the same work with the coil on the generator. If the numbers are displayed on the device, then the coil on the generator is working. If nothing happens on the device, then you will have to change the generator or hall sensor.
Comentários • 37
hello, I hope you can help me, I changed the central wiring on the alpha moped, I also changed the spark plug in the place with the armor wire and I have no sparks and the current doesn’t flow anywhere except from the ignition coil and that’s all what could be the reason
damn what to do please tell me I was riding an alpha 71kb moped and it started to stall and stalled and would not start again and I changed the spark plug and cleaned the corberator and it still did not start. And when you start it with your foot, sometimes it can shoot out of the pipe. Please tell me how to make a moped
Dmitry If the carburetor is in order and there is a spark, but the moped does not start, look at the valve head.
I can't start, can you help me?)
Why the hell are there extraneous sounds on the video, and so essentially nothing is said, so there are also extraneous sounds on the video.
Thank you very much helped
How much does armor wire cost?
help, I have no spark on my Verkhovina moped, what should I do?
Vitya Shapeev haha me too)
Hello everyone, take a look at my channel, I make different videos
Please give me some advice on why the Alpha moped does not have a spark, but it starts and there is a spark from the foot, the starter is spinning.
sprint 150cc spark not working
Where are you, I'll get you a motorcycle
Hello, how much does it cost to put a step on an Alfa moped?
Hello, I wanted to ask you, so I bought a 50 cc engine from an Alpha or Delta! And what do I need to buy to start it, what kind of wiring, so that it just starts from the kickstarter, basically from the stand!
Hello, I have such a problem. In the left cover, the coil was screwed onto 2 bolts, it turned out that 1 bolt was unscrewed and broke inside, there is a small hole on the magnet. I replaced the generator coil, ignition coil, and switch. Still no spark. Don't know what the problem is?
Denis, I have a spark, but it’s weak (it seems so to me). When starting with electric ignition, there is no such a confident sound (grinding), but a barely audible scrolling of the coil. What could this be?
Please tell me why there is no spark at the spark plug? I replaced the ignition coil, switch, and generator with new ones, still no =(.
I have the same problem((
Most likely the central wire (which fits the spark plug) needs to be replaced.
I have the same problem
Hello, I have a Trophy moped, such a problem happened when I turn on the turn signals they don’t blink and the dashboard doesn’t show that they are working either, what’s the matter, did I change the turn signals, maybe something wrong with the electronics?
+Denis Valerievich Thank you!
Most likely the turn signal relay has failed.
What about licenses for mopeds, are they already issued? Who knows what?
Andrey Samunin From the age of 16 you can take category A1 (up to 125 cubic meters) and category M (up to 50 cubic meters), and category A (No restrictions) from the age of 18.
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Do the spare parts from this site come normally and how long does it take to wait?
Hello, please tell me the website of the online store from which you order spare parts
+Denis Valerievich Thank you very much
Denis Valerievich, I didn’t drive all summer, because of a non-working spark plug, and as luck would have it, I bought new ones, but as it turned out, they weren’t working and they were fucked all summer, when it dawned on me to check the spark plugs themselves, they turned out to be pierced into the body, and there were NJK candles, although they weren’t expensive, I thought that this wouldn’t particularly affect their performance, but it turned out that it did.
+Denis Valerievich, apparently he didn’t know that it wasn’t working, so I already bought three candles and everything from one batch turned out to be bad, later I read similar cases with exactly the same candles that I bought. At first there was no spark at all on the new spark plug, after prolonged attempts to get a spark, it eventually made its way, and soon disappeared without a trace after a short period of work.
It happens that a spark plug and a new one don’t work; I’ve come across some of these. But there weren’t new ones in stock, and I don’t understand why I should carry a spark plug that doesn’t work with me)).
conclusions
From the article you learned why there is no spark on a 4t scooter and the reasons for such a malfunction. The cost of repair work may vary depending on the cost of the parts, but it is always more profitable to do the work yourself. And now you know what to do if the spark suddenly disappears; what to pay attention to. Be careful when troubleshooting, pay attention to details, refer to reference books for accurate data. Only if all conditions are met will you succeed!
The scooter today is a very relevant, popular, convenient and practical means of transportation for people of various age categories. For many, this technique is the only means of transportation, while for others it serves as a device for riding and entertainment. In any case, every Chinese or Japanese 4-stroke scooter may have problems, both mechanical and electronic. Today, various electronic problems often occur on scooters. Since modern technology has many built-in electronic systems, some of them may malfunction, which in most cases can be fixed on your own without visiting a workshop, where you will have to pay the craftsmen sometimes a large sum for repairs. To save money and time, it is better to service your scooter yourself. So, what should you do if there is no spark on your 4T scooter?
First you need to determine the reason why the spark disappeared. The first thing you should check is the spark plug, since this part fails for various reasons, and in order to avoid trivial problems that can be corrected in a couple of minutes, you need to replace the spark plug with another one.
If after replacement there is still no spark, you need to “dig” further. Now let's examine the wiring, which is responsible for power supply and spark generation. It quite often happens that when shaking on potholes, the wires become disconnected at the connections, and of course such a break will lead to the fact that not only will the spark disappear on the scooter, but other electrical appliances may not work. If you find a disconnected wire lying aimlessly on the frame or under the trim, then you should definitely find its true purpose; in all likelihood, it is this wire that can cause the lack of spark. It is also worth checking the components and boards that produce the spark; as a rule, they are not repaired, but replaced with new ones or high-quality used parts taken from disassembly.
There are cases when the spark on a 4t scooter sometimes disappears, how can you find and fix the breakdown with such symptoms? If the spark disappears from time to time, then you need to check the reliability of the contacts and examine the tightness of the wiring. If any connection that is responsible for supplying current to the spark supply unit has poor contact or moisture gets in, the spark will be supplied unstably, and at times may disappear altogether. To eliminate this problem, you should check the electrical wiring, thoroughly clean and insulate all connectors so that the contact is reliable and sealed. You can use electrical tape and sealant for this.
If you were driving and suddenly the spark on your 4T scooter disappeared on the road, what should you do in this case? Of course, you can simply pick up and tow the scooter to a service station, or fix the problem yourself, right on the road. You won’t have to disassemble much; it’s enough to remove the main part of the cladding to see the wires that feed the spark supply unit.
Some scooter models have protection against short circuits, so it's worth finding the fuse box and checking for any blown fuses. If you find a melted one and you don’t have a replacement, you can use foil or one strand of thin copper wire.
Sometimes it happens when a very weak spark on a 4t scooter leads to deterioration in engine performance, difficulties appear when starting, and when cold the scooter does not want to start at all. In this case, you need to check the main board, where the current pulse and the high-voltage coil are produced. Most motorcycle owners, as a rule, simply replace these parts and if the problem disappears, then they leave everything as is and ride until something fails again. Practice shows that this is the most effective and fastest way to eliminate such a breakdown as a weak spark.
Very often, foreign technology fails domestic motorcycle enthusiasts, who often encounter a problem when there is no spark on a 4T scooter from China, and many people don’t know what to do in this case. But in reality, everything is not so complicated, it is enough to change the main parts responsible for supplying the spark, check the wiring and the problem will be solved very quickly, the main thing is to be assertive and a little patience to find and fix the problem of the Chinese scooter.
If you don’t know why the spark disappeared on a 4t scooter, then you should dig a little deeper into the “insides” of your scooter, and you will definitely find the reason, which can only be hidden in the wiring and components responsible for creating the spark. In the case when there is no spark on a Chinese 4t scooter, you don’t need to immediately go to the station where you can be ripped off, it’s better to understand the system yourself and you should definitely enjoy the process of finding the problem and fixing it, and then you will be proud of the repaired equipment. Now you know when a bad spark occurs on a 4t scooter, what to do in such cases. The main thing in repair is to focus on the design of the system, understand its operating principle, and then the problem will become clear as two times two.
Tags: no spark spark on the scooter
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The reason that there is no spark on the scooter can be due to several malfunctions. In this article we will look at how to find them, where to start searching and what to do next.
First, let's understand that the lack of spark on a 2t or 4t scooter has almost identical reasons.
Ignition installation instructions
It is very important to correctly set the spark moment to ignite the fuel in a vehicle - the operation of the engine depends on it.
The instructions are as follows:
- disassemble the crankcase and make notes of the lower and upper positions of the piston;
- unscrew the spark plug and then turn the shaft until a spark appears, make a mark on the crankcase;
- you need to set the torque so that ignition occurs 2-3 mm below the top point of the piston;
- Loosen the alternator bolts and follow your moped's instructions to adjust the commutator.
